专利摘要:
Biologically pure culture of bradyrhizobia japonicum, bradyrhizobium strain, composition, and method for enhancing plant growth according to the present invention, unpublished isolates of bacterial strains have been shown to possess unique properties. These bacterial strains are plant growth promoting rhizobacteria (pgpr), have a better competitive advantage in legume plant colonization, and improve the full performance of leguminous plant growth. In addition, the present invention discloses a novel method for evaluating and selecting bacterial strains which exhibit the aforementioned beneficial characteristics.
公开号:BR112013024609B1
申请号:R112013024609-0
申请日:2012-03-30
公开日:2018-11-27
发明作者:Yaowei Kang;Jessica Smith;Shawn Semones;Kristi Woods
申请人:Novozymes Biologicals, Inc.;
IPC主号:
专利说明:

(54) Title: COMPOSITION, E, METHOD TO INTENSIFY PLANT GROWTH (73) Holder: NOVOZYMES BIOLOGICALS, INC., Companhia Norte Americana. Address: 5400 Corporate Circle, Salem, Virginia 24153, UNITED STATES OF AMERICA (US) (72) Inventor: YAOWEI KANG; JESSICA SMITH; SHAWN SEMONES; KRISTI WOODS.
Control Code: 576709991F532D51 351DEA8E427142C2
Validity Period: 20 (twenty) years from 03/30/2012, subject to legal conditions
Issued on: 11/27/2018
Digitally signed by:
Alexandre Gomes Ciancio
Substitute Director of Patents, Computer Programs and Topographies of Integrated Circuits
1/58 “COMPOSITION, AND, METHOD TO INTENSIFY PLANT GROWTH”
SEQUENCE LIST REFERENCE [0001] This application contains a sequence listing in computer readable form. The computer-readable form is incorporated by reference here.
REFERENCE TO A DEPOSIT OF BIOLOGICAL MATERIAL [0002] This application contains a reference to a deposit of biological material, the deposit of which is incorporated by reference. For complete information, see table 1.
FIELD OF THE INVENTION [0003] The present invention relates to isolated bacterial strains, and to a method of selecting bacterial strains with enhanced competitiveness and performance characteristics.
BACKGROUND OF THE INVENTION [0004] In order to maintain healthy growth, plants must extract a variety of elements from the soil in which they grow. These elements include nitrogen and so-called micronutrients (for example, copper, iron and zinc), but many soils are deficient in such elements or contain them only in forms that cannot be easily absorbed by plants (it is generally believed that elements essential oils cannot be easily absorbed by plants, unless they are present in the form dissolved in the soil). Nitrogen is an essential element for most plants, as it plays a role in the synthesis of amino acids, proteins, nucleotides, nucleic acids, chlorophyll, coenzymes and in the overall growth and health of the plant. To counteract such deficiencies, sources of deficient elements are commonly applied to soils in order to improve growth rates and yields obtained from crop plants. For example, nitrate and / or ammonium
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2/58 is often added to the soil to counteract a lack of available nitrogen.
[0005] In the field of crop science, it is well known that many cultivated crops require that the soil provide relatively large amounts of nitrogen to the plant. The notable exceptions for those plants that require nitrogen through the soil are the plants of the vegetable family.
[0006] Specifically, leguminous plants are exclusive to non-leguminous plants for their ability to fix atmospheric nitrogen in ammonia. The ability to fix atmospheric nitrogen in a usable nitrogen source for the plant eliminates the need for the plant to obtain nitrogen from the soil. Nitrogen fixation, however, requires a symbiotic relationship between the leguminous and bacterial plant native to the soil. One of the most extensively studied partners in this symbiotic relationship are bacteria that belong to the genus Bradyrhizobium or Rhizobium. Gresshoff, P. (1999). Identification of Plant Genes Involved in Plant-Microbe Interactions. Stacey G & Keen, T. (Ed.), Plant-Microbe Interactions (4th ed.) (Ch. 6). St. Paul: APS Press.
[0007] Symbiosis is usually achieved through a complex bidirectional signal exchange between the plant and the microbe and the microbe and the plant. Typically, plant factors, such as flavonoids and substances like flavonoids, induce colonization of bacteria in the root node of the leguminous plant. (Gresshoff, 1999). Once the bacteria have colonized the root nodule, the bacteria cause morphological changes in the plant, namely, curling and the development of the root hair of a new root organ - the nodule. (Gresshoff, 1999). The nodule allows the establishment of a new physiological environment in the nodule, inducing bacteria to differentiate in a nitrogen fixing endosymbiont, or bacteroid, for the colonized plant. (Gresshoff, 1999).
[0008] Rhizobial motility and chemotaxis are well known
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3/58 are important attributes for the competitiveness of the strain. For example, Althabegoiti, et al., 2008, FEMS Microbiol. Lett. 282: 115-123 discuss deriving a spontaneous mutant strain USDA 110 with greater motility that improves nodulation when compared to its wild type strain. Additionally, Maier, et al., 1990, Appl. Environ. Microbiol. 56 (8): 23412346 discuss the role of molybdenum during the biological nitrogen fixation process. Additionally, Alves, et al., 2003, Plant and soil 252: 1-9 discuss soybean inoculants used in Brazil and the importance of competitiveness for effective nitrogen fixation. Finally, Bloem, J.F., et al., 2001, Bio Fértil. Soils 33: 181-189 report the importance of competitiveness in the selection of the strain. In the study, the researchers used genetic engineering methods to place a reporting gene (GUS) in their index strain as a way to determine the competitiveness of the strains. (Bloem, et al. 2001). As the study (Bloem, et al. 2001) required extensive use of chemical staining and microscopy technology, the reported method remains an impractical approach to classifying large samples of microbes.
[0009] It is an objective of the present invention to provide a supercompetitive isolate (s) of bacteria of the genus Bradyrhizobia to colonize leguminous plants that perform (s) the ability to colonize commercially available strains, for example, USDA strain Commercial 532C. It is additionally an objective of the present invention to provide a supercompetitive isolate (s) of bacteria of the genus Bradyrhizobia to colonize leguminous plants capable of enhancing the effectiveness in promoting leguminous plant growth, in comparison with commercial strains available, for example, commercial USDA 532C strain. SUMMARY OF THE INVENTION [0010] In order to improve the overall health of the plant and the availability of a usable nitrogen source for plants, there is a
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4/58 need for bacterial strains that are superior in plant colonization and that increase overall plant growth. The isolated strains of the present invention realize these benefits.
[0011] The present invention relates to strains isolated from bacteria with at least the following improved characteristics compared to commercially available strains, for example, commercial USDA 532C strain, in which improved characteristics include, but are not limited to:
The. intensified competitiveness to colonize a plant; and
B. effectiveness in promoting intensified plant growth.
[0012] The present invention relates to biologically pure culture (s) of strain (s) Bradyrhizobia japonicum the strain with the accession number (also deposited as NRRL B-59571);
the strain with the access number (also deposited as NRRL B-59572);
the strain with the access number (also deposited as NRRL B-59565);
the strain with the access number (also deposited as NRRL B-59567);
the strain with the access number (also deposited as NRRL B-59566);
the strain with the access number (also deposited as NRRL B-59568);
the strain with the access number (also deposited as NRRL B-59570);
the strain with the access number (also deposited as NRRL B-59569);
the strain with the number of access to ao ao ao ao ao ao ao NRRL B-50592 deposit NRRL B-50593 deposit NRRL B-50586 deposit NRRL B-50588 deposit NRRL B-50587 deposit NRRL B-50587 deposit NRRL B-50589 deposit NRRL B- 50591 NRRL deposit B-50590 NRRL deposit B-50594
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5/58 (also deposited as NRRL B-50493);
the strain with the access number to the NRRL B-50726 deposit;
the strain with the access number to the NRRL B-50727 deposit;
the strain with the access number to the NRRL B-50728 deposit;
the strain with the access number to the NRRL B-50729 deposit; and the strain with the NRRL deposit number B-50730, or a combination of at least two or more of the strains previously deposited.
[0013] The present invention also relates to isolated bacterial strain (s) of the present invention which includes strain (s) that are (are) closely related to any of the previous strains based on 16S rDNA sequence identity, and which are at least 95% identical to any of the previous strains based on the 16S rDNA sequence identity.
[0014] The present invention further relates to a method of enhancing plant growth, comprising applying to the plants, plant seeds, or plants involving the soil or plant seeds a composition comprising at least one of the strains of the present invention or a combination of at least two or more of the strains previously deposited.
[0015] The invention additionally relates to compositions comprising one or more strains of the present invention, including an agronomically acceptable carrier.
BRIEF DESCRIPTION OF THE DRAWINGS [0016] Figure IA is an image of a PCR gel showing a unique nucleotide primer specific to USDA 532C.
[0017] Figure 1B is an image of a PCR gel showing specificity of the 209 nucleotide primer using USDA 532C and native strains.
[0018] Figure 2A is an image of a PCR gel showing
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6/58 USDA 532C Bradyrhizobia japonicum strain as the competitively dominant strain for soy nodulation.
[0019] Figure 2B is an image of a PCR gel showing non-USDA 532C Bradyrhizobia japonicum strains as the competitively dominant strain for soy nodulation.
[0020] Figure 3A is a DNA fingerprint dendrogram of isolated strains and USDA 532C:
138 - NRRL B-50589 (also deposited as NRRL B59568);
- NRRL B-50586 (also deposited as NRRL B59565);
pl40 - USDA 532C;
184 - NRRL B-50594 (also deposited as NRRL B50493);
142 - NRRL B-50590 (also deposited as NRRL B59569);
130 - NRRL B-50587 (also deposited as NRRL B59566);
- NRRL B-50588 (also deposited as NRRL B59567);
198 - NRRL B-50592 (also deposited as NRRL B59571);
135 - NRRL B-50591 (also deposited as NRRL B59570); and
- NRRL B-50593 (also deposited as NRRL B59572).
[0021] Figure 3B is a DNA fingerprint dendrogram of isolated strains and USDA 532C:
138 - NRRL B-50589 (also deposited as NRRL B
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59568);
- NRRL B-50586 (also deposited as NRRL B59565);
140 - USDA 532C;
184 - NRRL B-50594 (also deposited as NRRL B50493);
142 - NRRL B-50590 (also deposited as NRRL B59569);
130 - NRRL B-50587 (also deposited as NRRL B59566);
- NRRL B-50588 (also deposited as NRRL B59567);
198 - NRRL B-50592 (also deposited as NRRL B59571);
135 - NRRL B-50591 (also deposited as NRRL B59570);
- NRRL B-50593 (also deposited as NRRL B59572);
318 - NRRL B-50727,
278 - NRRL B-50726,
727 - NRRL B-50730,
370 - NRRL B-50728; and
518- NRRL B-50729.
DETAILED DESCRIPTION OF THE INVENTION [0022] The present invention relates to strains isolated from bacteria with at least the following improved characteristics compared to the commercially available strains, for example, commercial USDA 532C strain, where improved characteristics include, but are not limited to:
The. intensified competitiveness to colonize a plant; and
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B. effectiveness in promoting intensified plant growth.
[0023] "Bacterial strain (s)" as used herein means bacterial strains that are diazotrophic. That is, bacteria that are symbiotic nitrogen fixing bacteria. Non-limiting examples of bacterial strains as used herein include, but are not limited to, bacteria of the genus Rhizobium spp. (for example, R. cellulosilyticum, R. daejeonense, R. etli, R. galegae, R. gallicum, R. giardinii, R. hainanense, R. huautlense, R. indigoferae, R. leguminosarum, R. loessense, R. lupini, R. lusitanum, R. mongolense, R. miluonense, R. sullae, R. tropici, R. undicola, and / or R. yanglingense), Bradyrhizobium spp. (for example, B. bete, B. canariense, B. elkanii, B. iriomotense, B. japonicum, B. jicamae, B. liaoningense, B. pachyrhizi, and / or B. yuanmingense), Azorhizobium spp. (for example, A. caulinodans and / or A. doebereinerae), Sinorhizobium spp. (for example, S. abri, S. adhaerens, S. americanum, S. abo ris, S. fredii, S. indiaense, S. kostiense, S. kummerowiae, S. medicae, S. meliloti, S. mexicanas, S . morelense, S. saheli, S. terangae, and / or S. xinjiangense), Mesorhizobium spp (M. albiziae, M. amorphae, M. chacoense, M. ciceri, M. huakuii, M. loti, M. mediterraneum, M. pluifarium, M. septentrionale, M. temperatum, M. tianshanense). In a particular embodiment, bacterial strain (s) of the invention additionally include (s) Bradyrhizobium japonicum strains with deposit accession numbers NRRL B-50592 (also deposited as NRRL B-59571), NRRL B-50593 (deposited also as NRRL B59572), NRRL B-50586 (also deposited as NRRL B-59565), NRRL B-50588 (also deposited as NRRL B-59567), NRRL B-50587 (also deposited as NRRL B-59566), NRRL B -50589 (also deposited as NRRL B-59568), NRRL B-50591 (also deposited as NRRL B-59570); NRRL B-50590 (also deposited as NRRL B59569); NRRL B-50594 (also deposited as NRRL B-50493); NRRL
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B-50726; NRRL Β-50727; NRRL Β-50728; NRRL Β-50729; NRRL Β50730, or a combination of at least two or more of the strains previously deposited, including two of the previous strains, at least three of the previous strains, at least four of the previous strains, at least five of the previous strains, at least six of the previous strains at least seven of the previous strains, at least eight of the previous strains, at least nine of the previous strains, at least ten of the previous strains, at least eleven of the previous strains, at least twelve of the previous strains, at least thirteen of the previous strains, up to and including all previous strains.
[0024] The terms "commercially available strain (s)" mean commercially available bacterial strains, for example, USDA 532C, USDA 110, USDA 123, USDA 127, USDA 129, etc. Cregan, P.B., et al., 1989, Appl. and Enviro. Microbiol. 55 (10): 2532-2536.
[0025] As used herein, “intensified competitiveness” and / or “intensified nodulation” must mean bacterial strain (s) having a dominant percentage nodule occupation, for example, at least 50%, at least 55%, at least 60%, at least 65%, at least 70%, at least 75%, at least 80%, at least 85%, at least 85%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, up to 100% nodule occupation. “Intensified competitiveness” was determined according to the detailed test (s) described below (See Materials and Methods: “Primary Classification Protocol” and “Competition Study Protocol”).
[0026] As used herein, the term "nodule" is defined to include, but is not limited to, specific nodules, indeterminate nodules, or a combination thereof. Examples of determined nodules and indeterminate nodules are well known in the art and described in Denison, R. F., 2000, The Amer. Naturalist. 156 (6): 567-576. Determined nodules are
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10/58 found in the species Glycine, Lotus, or Phaseolus and are round and spherical in shape. (Denison, 2000) Certain nodules grew only for a limited period of time - typically a few weeks. (Denison, 2000) Unlike the determined nodules, indeterminate nodules are found in Medicago, Trifolium, and Pisium species, have an elongated shape and grow continuously. (Denison, 2000) [0027] "Node occupation" is a term known in the art. McDermott T.R. & Graham, P.H., Appl. and Environ. Microbiol. 55 (10): 2493-2498. As used herein, “nodule occupation” means the percentage of nodules occupied by a bacterial strain (s) other than a commercially available Bradyrhizobium strain, for example, USDA 532C, and / or the number of nodules containing a particular bacterial strain (s) other than a commercially available Bradyrhizobium strain, for example, USDA 532C, divided by the total number of nodules containing all bacterial strains. “Nodule occupation” was determined according to the detailed test (s) described below (See Materials and Methods: “Primary Classification Protocol” and “Competition Study Protocol”) and can be determined from an analysis of plant nodules obtained from both greenhouse and field samples. As an example, percentage nodule occupation = A / (A + B) where A is the number of nodules containing a particular bacterial strain (s) other than a commercially available Bradyrhizobium strain, for example, USDA 532C, and B is the number of nodules containing a commercially available Bradyrhizobium strain, for example, USDA 532C. It is well known in the art that, despite a rare exception, a single nodule will contain only one bacterial strain. Johnston, A.W.B., et al., 1974, J. Gen. Microbiol 87: 343-350; Dunham, D. H. & Baldwin, I.L., 1931, Soil Science 32: 235-249; Johnson, H.W., et al., 1963, Agrono. J. 55: 269-271; Dudman, W.F. & Brockwell, J., 1968, J. Agricul. Res. 19: 739-747; Nicol, H. & Thorton, H.G., 1941, Proc. Roy. Soc. B 130,
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32-59; Hughes, D.Q., & Vincent, J.M., 1942, Proc. Of the Linnenan Soc. Of New South Wales 67: 142-152; and Vincent, J.M. & Waters, L.M., 1953, J. Gen. Microbiol. 9: 357-370.
[0028] As used herein, "effectiveness in promoting enhanced growth" includes at least an increased plant yield measured in terms of bushels / acre, increased fruit number, increased root number, increased root length, root mass increased, increased root volume, increased foliage area, increased plant support, increased plant vigor, and / or increased nitrogen fixation capacity (N2). 'Effectiveness in promoting intensified growth ”was determined according to the detailed test (s) described below (See Materials and Methods:“ Primary Classification Protocol ”and“ Performance of the study protocol ”) and it can be determined from an analysis of plants obtained from both greenhouse and field samples.
[0029] As used herein, "increased fruit number" means a total number of soybean pods increased in a soybean foot and / or a total increased dry weight of soybean pods in a soybean foot.
[0030] As used herein, “total dry weight” means the weight of plant material (for example, plant fruit, plant pods, plant roots, plant nodules, total plants, partial plants, etc.) after incubation at 80 ° C for a specified period of time, for example, at least 4 hours, at least 8 hours, at least 12 hours, at least 24 hours, at least 48 hours, etc., or any period of time necessary for dry the plant matter. It should be understood that drying times for the purpose of determining “total dry weight” depend on many factors. Non-limiting factors that can impact the drying time include the material to be dried, the mass of the material to be dried, the amount of material to be dried, and / or combinations thereof. Incubation can be performed on any temperature-controlled device used in the technique. With
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For the purposes of this invention, “total dry weight” was determined with an Eppendorf Innova® 42R incubator.
[0031] The terms "increased nitrogen fixation capacity (N2)" as used here mean that isolated bacteria can increase nitrogen fixation (N2). According to the “Performance Study Protocol” provided below (Materials and Methods), the relative nitrogen fixation capacity (N2) of bacteria can be quantified by measuring the total nitrogen content of the plant using standard nitrogen quantification methods known by versed in the technique (for example, the Kjeldahl method, etc.). See Takahashi, M., et al., 2007. Uptake, Assimilation, and Novel Metabolism of Nitrogen Dioxide in Plants, p. 109118. In N. Willey (ed.), Phytoremediation: Methods and Reviews, vol. 23. Human Press, New York; Bremner, J. M. 1965. Total nitrogen, p. 1149-1178. In C.A. Black (ed.), Methods of soil analysis, vol. 2. American Society for Agronomy, Madison; Schank, S.C., et al., 1981, App. And Enviro. Microbiol., 41 (2): 342-345.
[0032] In yet another aspect of the present invention, the isolated bacterial strain (s) has an increased temperature tolerance. “Increased temperature tolerance” means the temperature range over which the isolated bacterial strain (s) are (are) capable of growing, for example, at maximum and minimum temperatures at which strain (s) ) Isolated Bradyrhizobium (s) can grow. In one aspect, “increased temperature tolerance” was determined according to the “Temperature Profile Protocol” discussed below (Materials and methods).
[0033] In yet another aspect of the present invention, the isolated bacterial strain (s) is (are) naturally resistant to glyphosate. In one aspect, "increased temperature tolerance" was determined according to the "Glyphosate Resistance Profile Protocol" discussed below (Materials and methods).
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13/58 [0034] In another aspect, the isolated bacterial strain (s) of the present invention includes (s) strain (s) that are (are) closely related to any one of the previous strains based on the 16S rDNA sequence identity. See Stackebrandt E, et al., “Report of the ad hoc committee for the re-evaluation of the species definition in bacteriology”, Int J Syst Evol Microbiol. 52 (3): 1043-7 (2002) regarding the use of 16S rDNA sequence identity to determine relationships in bacteria. In one embodiment, at least one strain is at least 95% identical to any of the previous strains based on the 16S rDNA sequence identity, at least 96% identical to any of the previous strains based on the 16S rDNA sequence identity, at least at least 97% identical to any of the previous strains based on the 16S rDNA sequence identity, at least 98% to any of the previous strains based on the 16S rDNA sequence identity, at least 98.5% identical to any of the strains previous ones based on the 16S rDNA sequence identity, at least 99% identical to any of the previous strains based on the 16S rDNA sequence identity or at least 99.5% identical to any of the previous strains based on the 16S sequence identity rDNA.
[0035] In another embodiment, the present invention includes a method to isolate bacterial strain (s) with intensified competitiveness to occupy the nodules of a leguminous plant and effectiveness in promoting intensified growth of leguminous plant. As used herein, the terms "isolate, isolate, isolating, and / or isolated, etc." they mean that the referenced material is removed from the environment in which it is normally found. The method includes, among other things:
The. obtain a bacterial strain (s) from a soil sample;
B. subjecting the bacterial strain (s) and a commercially available strain to a leguminous plant;
ç. select the bacterial strain (s) that is (are) most
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14/58 competitive (s) than the commercially available strain to occupy the nodules of a leguminous plant;
d. analyze the selected bacterial strain (s) that is (are) more competitive than the commercially available strain to occupy the nodules of a leguminous plant for the strain (s) bacterial (s) with effectiveness in promoting intensified growth of leguminous plants; and
and. isolate the bacterial strain (s) with effectiveness in promoting intensified growth of leguminous plants.
[0036] In one aspect, the isolated bacterial strain (s) is (are) strains of the genus BradyrhizobiA. In yet another aspect, the method further includes the step of classifying the Bradyrhizobium strain (s) against a specific nucleotide primer unique to a commercially available strain of Bradyrhizobia, for example, the commercial USDA 532C strain.
[0037] In yet another aspect, the method includes isolating a culture of Bradyrhizobia japonicum selected from the group consisting of:
the strain with the access number to the NRRL B-50592 deposit (also deposited as NRRL B-59571);
the strain with the access number to the NRRL B-50593 deposit (also deposited as NRRL B-59572);
the strain with the access number to the NRRL B-50586 deposit (also deposited as NRRL B-59565);
the strain with the access number to the NRRL B-50588 deposit (also deposited as NRRL B-59567);
the strain with the access number to the NRRL B-50587 deposit (also deposited as NRRL B-59566);
the strain with the access number to the NRRL B-50589 deposit (also deposited as NRRL B-59568);
the strain with the NRRL deposit number B-50591
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15/58 (also deposited as NRRL B-59570);
the strain with the access number to the NRRL B-50590 deposit (also deposited as NRRL B-59569);
the strain with the access number to the NRRL B-50594 deposit (also deposited as NRRL B-50493);
the strain with the access number to the NRRL B-50726 deposit;
the strain with the access number to the NRRL B-50727 deposit;
the strain with the access number to the NRRL B-50728 deposit;
the strain with the access number to the NRRL B-50729 deposit; and the strain with the NRRL B-50730 deposit accession number, or a combination of at least two or more of the aforementioned deposited strains, including more than two, such as at least three of the previous strains, at least four of the previous strains , at least five of the previous strains, at least six of the previous strains, at least seven of the previous strains, at least eight of the previous strains, at least nine of the previous strains, at least ten of the previous strains, at least eleven of the previous strains, at least twelve of the previous strains, at least thirteen of the previous strains, even one including all of the previous strains.
[0038] In yet another aspect, the method includes isolating bacterial strain (s) with increased temperature tolerance. See Materials and Methods: “Temperature Profile Protocol”.
[0039] Still in addition, the method includes isolating a bacterial strain (s) with natural resistance to glyphosate. See Materials and Methods: “Glyphosate Profile Resistance Protocol”.
[0040] In another preferred aspect, the method includes isolating selected bacterial strain (s) of the genus consisting of Rhizobium and Bradyrhizobium capable of increasing the nodulation of a leguminous plant. Composition [0041] The present invention includes a composition
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16/58 comprising at least one of the isolated bacterial strain (s) of the present invention or a combination of at least two or more of the previously deposited strains, including more than two, such as at least three of the previous strains, at least four of the previous strains, at least five of the previous strains, at least six of the previous strains, at least seven of the previous strains, at least eight of the previous strains, at least nine of the previous strains, at least ten of the previous strains, at least eleven of the previous strains, at least twelve of the previous strains, at least thirteen of the previous strains, even one including all the previous strains and an agronomically suitable carrier.
[0042] In some embodiments, the composition may be an inoculant composition. As used herein and in the art, the terms "inoculant composition" generally refer to compositions or materials that introduce compatible bacterial strains both on an external surface of the seeds and in the seed groove.
[0043] The composition may comprise one or more agronomically acceptable carriers. In examples where multiple agronomically acceptable carriers are used, the agronomically acceptable carriers may be the same or different. As used here in conjunction with carrier, the terms "agronomically acceptable" refer to any material that can be used to distribute the assets to a seed, soil or plant, and preferably whose carrier can be added (to the seed, soil or plant ) without having an adverse effect on plant growth, soil structure, soil drainage or the like. Suitable carriers include, but are not limited to, wheat straw, cereal bran, milled wheat straw, peat powders or granules, plaster based granules, and clays (for example, kaolin, bentonite, montmorillonite). Formulations such as liquid powder, peat or humectant, will be suitable for seed coating. When used to coat seeds, the material
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17/58 can be mixed with water, applied to the seeds and dried naturally. Still another example of other carriers includes cereal bran moistened, dried, sieved and applied to the seeds before coating with an adhesive, for example, gum arabic. In modalities that imply the formulation of assets, the agronomically acceptable carrier can be watery. If a liquid carrier is used, the liquid carrier (for example, water) will typically include growth medium to grow the bacterial strains. Non-limiting examples of suitable growth medium for bacterial strains include mannitol yeast extract, glycerol yeast extract, or any medium known to those skilled in the art as compatible and / or providing growth nutrients for bacterial strains.
[0044] Also encompassed by the compositions of the present invention are compositions including one or more signal molecules. Non-limiting examples of plant signal molecules include nodulation factors (i.e., lipo-chito-oligosaccharide), chito-oligosaccharides, chitinous compounds, flavonoids, jasmonic acid or its derivatives, linoleic acid or its derivatives, linoleic acid or its derivatives , carricines, or combinations thereof.
[0045] Lipo-chito-oligosaccharide compounds (LCO's), also known in the art as symbiotic Nod signals or Nodulation factors, consist of an oligosaccharide backbone of N-acetyl-D-glucosamine residues (“GIcNAc”) Pl , 4-linked with an N-linked condensed grease chain on the non-reduction terminal. LCO's differ in the number of GIcNAc residues in the backbone, in the length and degree of saturation of the acyl grease chain, and in the substitution of reducing and non-reducing sugar residues. An example of an LCO is presented below as formula I:
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in which:
G is a hexosamine that can be replaced, for example, by an acetyl group in nitrogen, a sulfate group, an acetyl group and / or an ether group in an oxygen,
Ri, R2, R3, R5, Ró and R7, which can be identical or different, represent H, CH3 CO—, C x H y CO— where x is an integer between 0 and 17, and y is an integer between 1 and 35, or any other acyl group such as, for example, a carbamyl,
R4 represents a mono, di or tri unsaturated aliphatic chain containing at least 12 carbon atoms, and n is an integer between 1 and
4.
[0046] LCOs can be obtained (isolated and / or purified) from bacteria such as Rhizobia, for example, Rhizobium spp., Bradyrhizobium spp., Sinorhizobium spp. and Azorhizobium spp. The LCO structure is characteristic for each such bacterial species, and each strain can produce multiple LCO's with different structures. For example, specific LCOs of
5. meliloti were also described in U.S. patent 5,549,718 having formula II:
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w
HC - ^ (CH 2 ) 5
ch 3 in which R represents H or CH 3 CO— en is equal to 2 or 3.
[0047] Even more specific LCOs include NodRM, NodRM-1, NodRM-3. When acetylated (the R = CH 3 CO—), they become AcNodRM-1, and AcNodRM-3, respectively (US patent 5,545,718).
[0048] LCOs of Bradyrhizobium japonicum are described in US patents 5,175,149 and 5,321,011. In general, they are pentasaccharide phytohormones comprising methylfucose. Numerous of these BCOs derived from B. japonicum are described: BjNod-V (Ci 8: i); BjNod-V (A c , C. 8: i), BjNod-V (C16: i); and BjNod-V (A or Ci 6: o), with V indicating the presence of five N-acetylglycosamines; Ac an acetylation; the number after C indicating the number of carbons in the fatty acid side chain; and the number after the number of double bonds.
[0049] LCO's used in compositions of the invention can be obtained (i.e., isolated and / or purified) from the bacterial strains that produce LCO's, such as the strains of Azorhizobium, Bradyrhizobium (including B. japonicum), Mesorhizobium, Rhizobium (including R leguminosarum), Sinorhizobium (including S. melilotí), and genetically bacterial strains
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20/58 modified by engineering to produce LCO's.
[0050] Also encompassed by the present invention are compositions using LCOs obtained (i.e., isolated and / or purified) from a mycorrhizal fungus, such as fungi of the Glomerocycota group, for example, Glomus intraradicus. The structures of representative LCOs obtained from these fungi are described in WO 2010/049751 and WO 2010/049751 (the LCOs described therein also referred to as Myc factors).
[0051] Additionally encompassed by the compositions of the present invention is the use of synthetic LCO compounds, such as those described in WO 2005/063784, and recombinant LCO’s produced through genetic engineering. The basic naturally occurring LCO structure may contain modifications or substitutions observed in naturally occurring LCO’s, such as those described in Spaink, Crit. Rev. Plant Sci. 54: 257288 (2000) and D'Haeze, et al., Glycobiology 72: 79R-105R (2002). Precursor oligosaccharide molecules (COs, which as described below are also used as plant signal molecules in the present invention) for the construction of LCOs can also be synthesized by genetically engineered organisms, for example, as in Samain, et al ., Carb. Res. 502: 35-42 (1997); Samain, et al., J. Biotechnol. 72: 33-47 (1999).
[0052] LCO's can be used in various forms of purity and can be used alone or in the form of a culture of bacteria or fungi producing LCO. Methods for providing substantially pure LCO's include simply removing microbial cells from a mixture of LCOs and the microbe, or continuing to isolate and purify the LCO molecules through LCO solvent phase separation followed by HPLC chromatography as described, for example, in US patent 5,549,718. Purification can be improved by repeated HPLC, and the purified LCO molecules can be lyophilized for long-term storage.
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21/58 [0053] Chito-oligosaccharides (COs) are known in the art as N-acetyl glucosamine β-1-4 linked structures identified as chitin oligomers, also as N-acetylquito-oligosaccharides. CO's have unique and different side chain decorations that make them different from the chitin molecules [(CsHhNOs) !!, CAS No. 1398-61-4], and chitosan molecules [(C5H1 iNO ^ n, CAS No. 9012- 76-4]. Representative literature describing the structure and production of COs is as follows: Van der Holst, et al., Current Opinion in Structural Biology, 77: 608616 (2001); Robina, et al., Tetrahedron 55: 521-530 (2002); Hanel, et al., Plant 252: 787-806 (2010); Rouge, et al. Chapter 27, T Molecular Immunology of Complex Carbohydrates in Advances in Experimental Medicine and Biology, Springer Science; Wan, et al., Plant Cell 27: 1053-69 (2009); PCT / F100 / 00803 (9/21/2000); and Demont-Caulet, et al., Plant Physiol. 720 (7): 83-92 (1999 COs can be synthetic or recombinant. Methods for preparing recombinant COs are known in the art. See, for example, Samain, et al. (Supra.); Cottaz, et al., Meth. Eng. 7 (4) : 311-7 (2005) and Samain, etal., J. Biotechnol. 72: 33-47 (1999).
[0054] Compositions of the present invention may also include chitinous compounds (other than COs), flavonoids, jasmonic acid, linoleic acid and linoleic acid and its derivatives, and carricins.
[0055] Chitin and chitosans, which are the main components of the cell walls of fungi and the exoskeletons of insects and crustaceans, are also composed of residues of GIcNAc. Chitinous compounds include chitin, (IUPAC: N- [5 - [[3-acetylamino-4,5-dihydroxy-6- (hydroxymethyl) oxan2yl] methoxymethyl] -2 - [[5-acetylamino-4,6-di -hydroxy-2- (hydroxymethyl) oxan-3yl] methoxymethyl] -4-hydroxy-6- (hydroxymethyl) oxan-3-yl] ethanamide), and chitosan, (IUPAC: 5-amino-6- [5-amino- 6- [5-amino-4,6-dihydroxy-2 (hydroxymethyl) oxan3-yl] oxy-4-hydroxy-2- (hydroxymethyl) oxan-3-yl] oxy-2 (hydroxymethyl) oxane-3, 4diol). These compounds can be obtained commercially, for example, by
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Sigma-Aldrich, or prepared from insects, crustacean shells, or fungal cell walls. Methods for the preparation of chitin and chitosan are known in the art, and have been described, for example, in U.S. Patent 4,536,207 (preparation of crustacean shells), Pochanavanich, et al., Lett. Appl. Microbiol. 35: 17-21 (2002) (preparation of fungal cell walls), and U.S. patent 5,965,545 (preparation of crab shells and commercial chitosan hydrolysis). Deacetylated chitins and chitosans can be obtained that range from less than 35 to more than 90% deacetylation, and cover a wide spectrum of molecular weights, for example, low molecular weight chitosan oligomers less than 15kD and 0.5 chitin oligomers at 2kD; practical grade chitosan with a molecular weight of about 15kD; and high molecular weight chitosan up to 70kD. Chitin and chitosan compositions formulated for seed treatment are also commercially available. Commercial products include, for example, ELEXA® (Plant Defense Boosters, Inc.) and BEYOND ™ (Agrihouse, Inc.).
[0056] Flavonoids are phenolic compounds with the general structure of two aromatic rings connected by a bond of three carbons. Flavonoids are produced by plants and have many functions, for example, as beneficial signaling molecules, and as protection against insects, animals, fungi and bacteria. Classes of flavonoids include chalcones, anthocyanidins, coumarins, flavones, flavonols, flavonones, and isoflavones. See Jain, et al., J. Plant Biochem. & Biotechnol. 77: 1-10 (2002); Shaw, et al., Environmental Microbiol. 77: 1867-80 (2006).
Representative flavonoids that can be used in compositions of the present invention include genistein, daidzein, formononetine, naringenin, hesperetin, luteolin and apigenin. Flavonoid compounds are commercially available, for example, from Natland Intemational Corp., Research Triangle Park, NC; MP Biomedicals, Irvine, CA; LC Laboratories, Wobum MA. Flavonoid compounds can be
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23/58 isolated from plants or seeds, for example, in the manner described in U.S. patents 5,702,752; 5,990,291; and 6,146,668. Flavonoid compounds can also be produced by genetically engineered organisms, such as yeast, in the manner described in Ralston, et al., Plant Physiology 737: 1375-88 (2005).
[0058] Jasmine acid (JA, [1 R- [la, 2P (Z) JJ-3-oxo-2- (pentenyl acid) cyclopentanoacetic) and its derivatives, linoleic acid ((Z, Z) 9,12- octadecadienico) and its derivatives, and linoleic acid ((Ζ, Ζ, Ζ) 9,12,15-octadecatrienoic acid) and its derivatives, can also be used in compositions of the present invention. Jasmine acid and its methyl ester, methyl jasmonate (MeJA), collectively known as jasmonates, are compounds based on octadecanoid that occur naturally in plants. Jasmine acid is produced by the roots of wheat seedlings, and by fungal microorganisms such as Botryodiplodia theobromae and Gibbrella fujikuroi, yeast (Saccharomyces cerevisiaè), and pathogenic and non-pathogenic strains of Escherichia coli. Linoleic acid and linoleic acid are produced in the course of biosynthesis of jasmonic acid. Jasmonates, linoleic acid and linoleic acid (and their derivatives) are reported to induce expression of the Nod gene or production of LCO by rhizobacteria. See, for example, Mabood, Fazli, Jasmonates induce the expression of Nod genes in Bradyrhizobium japonicum, May 17, 2001; and Mabood, Fazli, Linoleic and acid linoleic induce the expression of genes Nod in Bradyrhizobium japonicum, USDA 3, May 17, 2001.
[0059] Used derivatives of linoleic acid, linoleic acid, and jasmonic acid that can be used in compositions of the present invention include esters, starches, glycosides and salts. Representative esters are compounds in which the carboxyl group of linoleic acid, linoleic acid, or jasmonic acid has been replaced with a —COR group, where R is a group — OR1, in which R 1 is: an alkyl group, such as an alkyl group -Ci-Cg no
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Branched or branched, for example, a methyl, ethyl or propyl group; an alkenyl group, such as an unbranched or branched C2-C8 alkenyl group; an alkynyl group, such as an unbranched or branched C2-C8 alkynyl group; an aryl group, for example, with 6 to 10 carbon atoms; or a heteroaryl group, for example, with 4 to 9 carbon atoms, where the heteroatoms in the heteroaryl group can be, for example, N, O, P, or S. Representative starches are compounds in which the carboxyl group of linoleic acid , linoleic acid, or jasmonic acid has been replaced with a —COR group, where R is an NR 2 group R 3 , in which R 2 and R 3 are independently: hydrogen; an alkyl group, such as an unbranched or branched C1-6 alkyl group, for example, a methyl, ethyl or propyl group; an alkenyl group, such as an unbranched or branched C2-C8 alkenyl group; an alkynyl group, such as an unbranched or branched alkynyl-C2Cs group; an aryl group, for example, with 6 to 10 carbon atoms; or a heteroaryl group, for example, with 4 to 9 carbon atoms, where the heteroatoms in the heteroaryl group can be, for example, N, O, P, or S. Esters can be prepared by known methods, such as nucleophilic addition acid-catalyzed, in which the carboxylic acid is reacted with an alcohol in the presence of a catalytic amount of a mineral acid. Starches can also be prepared by known methods, such as by reacting the carboxylic acid with the appropriate amine in the presence of a coupling agent such as dicyclohexyl carbodiimide (DCC), under neutral conditions. Suitable linoleic acid, linoleic acid, and jasmonic acid salts include, for example, base addition salts. Bases that can be used as reagents to prepare metabolically acceptable base salts of these compounds include those derived from cations such as alkali metal cations (for example, potassium and sodium) and alkaline earth metal cations (for example, calcium and magnesium) . These salts can be easily prepared by mixing a solution of acid
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25/58 linoleic, linoleic acid, or jasmonic acid with a solution of the base. The salt can be precipitated from the solution and collected by filtration or it can be recovered by other means, such as by evaporation of the solvent.
[0060] Carricins are 4H-vinyl pyrones, for example, 2Hfuro [2,3-c] pyran-2-ones including their derivatives and analogues. Examples of these compounds are represented by the following structure:
on what; Z is O, S or NR5; R1, R2, R3, and R4 are each independently H, alkyl, alkenyl, alkynyl, phenyl, benzyl, hydroxy, hydroxyalkyl, alkoxy, phenyloxy, benzyloxy, CN, CHOR, COOR =, halogen, NR6R7, or NO2; and R5, Rô, and R7 are each independently H, alkyl or alkenyl, or a biologically acceptable salt thereof. Examples of biologically acceptable salts of these compounds may include acid addition salts formed with biologically acceptable acids, examples of which include hydrochloride, hydrobromide, sulfate or bisulfate, phosphate or hydrogen phosphate, acetate, benzoate, succinate, fumarate, maleate, lactate, citrate, tartrate, gluconate; methanesulfonate, benzenesulfonate and ptoluenesulfonic acid. Additional biologically acceptable metal salts may include alkali metal salts, with bases, examples of which include the sodium and potassium salts. Examples of compounds covered by the structure that may be suitable for use in the present invention include the following: 3-methyl-2H-bore [2,3-c] pyran-2-one (where Ri = CH3, R2, R3, R4 = H) , 2H-hole [2,3c] pyran-2-one (where Ri, R2, R3, R4 = H), 7-methyl-2H-hole [2,3-c] pyran-2-one (where Ri, R2, R4 = H, R3 = CH3), 5-methyl-2H-bore [2,3-c] pyran-2-one (where R1, R2, R3 = H, R4 = CH3), 3,7-dimethyl -2H-hole [2,3-c] pyran-2-one (where Ri,
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R.3 = CH3, R2, R4 = H), 3,5-dimethyl-2H-bore [2,3-c] pyran-2-one (where R1, R4 = CH3, R2, R 3 = H), 3,5,7-trimethyl-2H-hole [2,3-c] pyran-2-one (where Ri, R3, R4 = CH3, R 2 = H), 5-methoxymethyl-3-methyl-2H-hole [2,3-c] pyran-2-one (where Ri = CH3, R2, R 3 = H, R4 = CH 2 OCH 3 ), 4-bromo-3,7-dimethyl-2H-bore [2,3 -c] pyran2-one (where Ri, R3 = CH3, R2 = Br, R4 = H), 3-methylfuro [2,3-c] pyridin-2 (3H) -one (where Z = NH, Ri = CH3 , R2, R3, R4 = H), 3,6-dimethylfuro [2,3-c] pyridin-2 (6H) one (where Z = N — CH3, Ri = CH3, R2, R3, R4 = H). See, US patent 7,576,213. These molecules are also known as carricins. See Halford, supra.
[0061] Compositions of the present invention may additionally include an agriculturally / agronomically beneficial agent. Non-limiting examples of such agents that can be used in the practice of the present invention include herbicides, fungicides and insecticides.
[0062] Suitable herbicides include bentazone, acifluorfen, chlorimuron, lactofen, clomazone, fluazifop, glufosinate, glyphosate, setoxidime, imazetapyr, imazamox, fomesafe, flumichlorac, imazaquin, and cletodim. Commercial products containing each of these compounds are readily available. Herbicide concentration in the composition will generally correspond to the marked usage rate for a particular herbicide.
[0063] A fungicide as used here and in the technique, is an agent that kills or inhibits fungal growth. As used herein, a fungicide exhibits activity against a particular species of fungi if treatment with the fungicide results in killing or inhibiting the growth of a fungal population (for example, in the soil) relative to an untreated population. Effective fungicides according to the invention will adequately exhibit activity against a wide range of pathogens, including, but not limited to, Phytophthora, Rhizoctonia, Fusarium, Pythium, Phomopsis or Selerotinia and Phakopsora and combinations thereof.
[0064] Commercial fungicides may be suitable for use in
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27/58 the present invention. Suitable commercially available fungicides include PROTÉGÉ, RIVAL or ALLEGIANCE EL or LS (Gustafson, Plano, TX), WARDEN RTA (Agrilance, St. Paul, MN), APRON XL, APRON MAXX RTA or RFC, MAXIM 4FS or XL (Syngenta, Wilmington , DE), CAPTAN (Arvesta, Guelph, Ontario) and PROTREAT (Nitragin Argentina, Buenos Aires, Argentina). Active ingredients in these and other commercial fungicides include, but are not limited to, fludioxonil, mefenoxam, azoxystrobin and metalaxyl. Commercial fungicides are best used according to the manufacturer's instructions at the recommended concentrations.
[0065] As used herein, an insecticide exhibits activity against a particular species of insect if treatment with the insecticide results in the killing or inhibition of an insect population relative to an untreated population. Effective insecticides according to the invention will adequately exhibit activity against a wide range of insects including, but not limited to, beetles, caterpillars, larvae, corn root larvae, corn seed larvae, flea beetles, bedbugs, aphids, beetles. leaf, and stink bugs.
[0066] Commercial insecticides may be suitable for use in the present invention. Suitable commercially available insecticides include CRUISER (Syngenta, Wilmington, DE), GAÚCHO and PONCHO (Gustafson, Plano, TX). Active ingredients in these and other commercial insecticides include thiamethoxam, clothianidin, and imidacloprid. Commercial insecticides are best used according to the manufacturer's instructions at the recommended concentrations.
[0067] Compositions of the present invention are also intended to include the use of one or more phosphate solubilizing agents. As used herein, phosphate solubilizing agents include, but are not limited to, phosphate solubilizing microorganisms. As used here, “micro
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28/58 phosphate solubilizing organism ”is a microorganism that is capable of increasing the amount of phosphorus available to a plant. Phosphate solubilizing microorganisms include fungal and bacterial strains. In one embodiment, the phosphate solubilizing microorganism is a spore-forming microorganism.
[0068] Non-limiting examples of phosphate solubilizing microorganisms include species of a genus selected from the group consisting of Acinetobacter, Arthrobacter, Árthrobotrys, Aspergillus, Azospirillum, Bacillus, Burkholderia, Candida Chryseomonas, Enterobacter, Eupenicillium, Exiguobacterium, Klebsiella , Microbacterium, Mucor, Paecilomyces, Paenibacillus, Penicillium, Pseudomonas, Sawn, Stenotrophomonas, Streptomyces, Streptosporangium, Swaminathania, Thiobacillus, Torulospora, Vibrio, Xanthobacter, and Xanthomonas.
[0069] Non-limiting examples of phosphate-solubilizing microorganisms are selected from the group consisting of Acinetobacter calcoaceticus, Acinetobacter spp., Arthrobacter spp., Árthrobotrys oligospora, Aspergillus sp. Bacillus circulans, Bacillus licheniformis, Bacillus subtilis, Burkholderia cepacia, Burkholderia vietnamiensis, Candida krissii, Chryseomonas luteola, Enterobacter aerogenes, Enterobacter asburiae, Enterobacter spp., Enterobacter taylorae, Eupenicillium spychobacterium sp. ., Mucor ramosissimus, Paecilomyces hepialid, Paecilomyces marquandii, Paenibacillus macerans, Paenibacillus mucilaginosus, Pantoea aglomerans, Penicillium expansum, Pseudomonas corrugato, Pseudomonas fluorescens, Pseudomonas lutea, Pseudomonas poea, Pseudomonas, Pseudomonas, Pseudomonas, Pseudomonas, scens, Stenotrophomonas maltophilia, Streptomyces sp., Streptosporangium spp., Swaminathania
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29/58 salitolerans, Thiobacillus ferrooxidans, Torulospora globosa, Vibrio proteolyticus, Xanthobacter agilis, and Xanthomonas campestris.
[0070] In one embodiment, the phosphate solubilizing microorganism is a strain of the Penicillium fungus. Strains of the Penicillium fungus that can be used in the practice of the present invention include P. bilaiae (formerly known as P. bilaii), P. albidum, P. aurantiogriseum, P. chrysogenum, P. citreonigrum, P. citrinum, P. digitatum, P. frequentas, P. fuscum, P. gaestrivorus, P. glabrum, P. griseofulvum, P. implicatum, P. janthinellum, P. lilacinum, P. minioluteum, P. montanense, P. nigricans, P. oxalicum, P. pinetorum, P. pinophilum, P. purpurogenum, P. radicans, P. radicum, P. raistrickii, P. rugulosum, P. simplicissimum, P. solitum, P. variabile, P. velutinum, P. viridicatum, P. glaucum, P. fussiporus, and P. expansA.
[0071] In another embodiment, the species of Penicillium phosphate solubilizing microorganism is P. bilaiae, P. gaestrivorus, and / or a combination of these. In yet another modality, the P. bilaiae strains are selected from the group consisting of ATCC 20851, NRRL 50169, ATCC 22348, ATCC 18309, NRRL 50162 (Wakelin, et al., 2004. Biol Fertile Soils 40: 36-43) and the P. gaestrivorus strain is NRRL 50170 (See, Wakelin, supra.).
[0072] According to compositions of the invention, it is envisaged that more than one phosphate solubilizing microorganism can be used, such as at least two, at least three, at least four, at least five, at least 6, including any combination of Acinetobacter, Arthrobacter, Arthrobotrys, Aspergillus, Azospirillum, Bacillus, Burkholderia, Candida Chryseomonas, Enterobacter, Eupenicillium, Exiguobacterium, Klebsiella, Kluyvera, Microbacterium, Mucor, Paecilomyces, Streptomone, Paenibacillone, , Swaminathania, Thiobacillus, Torulospora, Vibrio, Xanthobacter, and Xanthomonas, including
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30/58 a species selected from the following group: Acinetobacter calcoaceticus, Acinetobacter spp., Arthrobacter spp., Arthrobotrys oligospora, Aspergillus niger, Aspergillus spp., Azospirillum halopraeferans, Bacillus amyloliquefaciens, Bacillus atrophaisus, Bacillusisillisillis, Bacillusillis, Bacillusillis cepacia, Burkholderia vietnamiensis, Candida krissii, Chryseomonas luteola, Enterobacter aerogenes, Enterobacter asburiae, Enterobacter spp., Enterobacter taylorae, Eupenicillium parvum, Exiguobacterium spp., Klebsiella spp. , Paenibacillus macerans, Paenibacillus mucilaginosus, Pantoea aglomerans, Penicillium expansum, Pseudomonas corrugato, Pseudomonas fluorescens, Pseudomonas lutea, Pseudomonas poae, Pseudomonas putida, Pseudomonas stutzeri, Pseudomonas stutzeri, Pseudomonas, Tritium, trivium, trivium a spp., Swaminathania salitolerans, Thiobacillus ferrooxidans, Torulospora globosa, Vibrio proteolyticus, Xanthobacter agilis, and Xanthomonas campestris.
[0073] In another embodiment, the present invention includes a method of enhancing plant growth, comprising applying to plants, plant seeds, or plants involving the soil or plant seeds one or more of the bacterial strain (s) (s) of the present invention (including a composition comprising at least one (s) of the isolated bacterial strain (s) of the present invention and an agronomically acceptable carrier. One or more bacterial strains may comprise only a bacterial strain or a combination of at least two or more of the strains of the present invention, including more than two, such as at least three of the previous strains, at least four of the previous strains, at least five of the previous strains, at least six of the previous strains, at least seven of the previous strains, at least eight of the strains
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31/58 previous, at least nine of the previous strains, at least ten of the previous strains, at least eleven of the previous strains, at least twelve of the previous strains, at least thirteen of the previous strains, up to one including all the previous strains.
Applications [0074] The methods of the invention include a treatment step to apply at least one of the isolated strains and / or compositions comprising at least one of the isolated strains to seeds, seedlings, roots, plants, soils, or combinations thereof. "Treat" or "treatment", as the terms are used here and in the technique, refer to any application that results in contact of seeds, seedlings, roots, or plants with an effective amount of a composition or components for treatment to increase competitiveness to colonize a plant and effectiveness in promoting plant growth.
[0075] The effective amount and / or appropriate application rates vary according to the type of soil, the type of plants, the amounts of the micronutrient source present in or added to the soil, etc. and an adequate rate can be observed without difficulty by simple trial and error experiments for each particular case. Typically, the rate for applying at least one of the isolated strains and / or compositions comprising at least one of the isolated strains falls within the range of 1 χ 10 2 - 1 χ 10 8 colony forming units (cfu) per seed (when coated seeds are used). In a specific modality, the application rate falls in the range of 1 χ 10 4 - 1 χ 10 5 colony forming units (cfu) per seed (when coated seeds are used. In a granular carrier, the application rate falls in the range of 1 χ 10 8 - 1 χ 10 13 cfu per hectare In a specific modality, the application rate in a granular carrier falls in the range of 2 χ 10 11 - 6 χ 10 11 cfu per hectare, although the inoculant compositions and / or compositions used in accordance with the present invention
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32/58 may include a mixture / combination of at least two or more different bacterial strains, it is the total number of colony forming units in the combined mixture that is referred to throughout the specification. The effective amount of LCO and / or CO used in a composition of the invention for treating a seed is directly expressed in units of concentration and generally ranges from about IO "5 to about 10 14 M (molar concentration), and in some embodiments from about IO "IO 5 to about 11 M, and in some other embodiments from about IO" 7 to about IO "8 M. Expressed in weight units, the effective amount generally ranges from about 1 to about 400 pg / short yard (cwt) of seed, and in some modalities from about 2 to about 70 pg / cwt, and in some other modalities, from about 2.5 to about 3.0 pg / cwt of seed.
[0076] For seed treatment purposes indirectly, that is, furrow treatment, the effective amount of LCO or CO generally ranges from 1 pg / acre to about 70 pg / acre, and in some modalities, from about 50 pg / acre to about 60 pg / acre. For purposes of application to plants, the effective amount of LCO or CO generally ranges from 1 pg / acre to about 30 pg / acre, and in some embodiments, from about 11 pg / acre to about 20 pg / acre.
[0077] The treatment can be carried out directly, that is, by application directly on seeds, seedlings, roots, or plants (including foliage), or it can be carried out indirectly, that is, by application on the soil (including in the furrow).
[0078] As will be understood, treatment with each component can be performed sequentially or simultaneously. For example, if a liquid carrier is used, the components can be cosuspended in a commercially treated mixing tank and subsequently applied to the seeds by any suitable coating process, for example, film coating. In the film coating process, a sludge is sprayed onto the seeds in a
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33/58 continuous coating process. Alternatively, for example, if a dust or dust carrier is used, the components can be applied sequentially. Consequently, the treatment may also include foliar application and / or application of the compositions in the furrow.
[0079] Non-limiting examples of plants to be treated by isolated strains and / or compositions comprising at least one of the isolated strains include leguminous crops. Non-limiting examples of leguminous crops include, but are not limited to, plants such as soy, alfalfa, peanuts, peas, lentils, beans, and clover. As will be perceived, the term tillage includes any material from the plant that can be harvested.
Culture [0080] The present invention relates to a biologically pure culture of strain / sj Bradyrhizobia japonicum the strain with the access number to the NRRL B-50592 deposit (also deposited as NRRL B-59571);
the strain with the access number to the NRRL B-50593 deposit (also deposited as NRRL B-59572);
the strain with the access number to the NRRL B-50586 deposit (also deposited as NRRL B-59565);
the strain with the access number to the NRRL B-50588 deposit (also deposited as NRRL B-59567);
the strain with the access number to the NRRL B-50587 deposit (also deposited as NRRL B-59566);
the strain with the access number to the NRRL B-50589 deposit (also deposited as NRRL B-59568);
the strain with the access number to the NRRL B-50591 deposit (also deposited as NRRL B-59570);
the strain with the access number to the NRRL B-50590 deposit (also deposited as NRRL B-59569);
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34/58 the strain with the access number to the NRRL B-50594 deposit (also deposited as NRRL B-50493);
the strain with the access number to the NRRL B-50726 deposit; the strain with the access number to the NRRL B-50727 deposit; the strain with the access number to the NRRL B-50728 deposit;
the strain with the access number to the NRRL B-50729 deposit; and the strain with the access number to the NRRL B-50730 deposit.
[0081] As used herein, the term biologically pure culture means a culture essentially without biological contamination and with genetic uniformity in such a way that different subcultures taken from it will exhibit substantially identical genotypes and phenotypes (for example, cultures have a purity of at least 60%, at least 65%, at least 70%, at least 75%, at least 80%, at least 85%, at least 90%, at least 91%, at least 92%, at least 93%, at least least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, up to 100% pure). Such cultures can be used for large-scale fermentation or for other commercial purposes. Consequently, mutants, transconjugants, recombinants, and genetically engineered variants that are derived from strains Bradyrhizobium japonicum with deposit accession numbers NRRL B-50592 (also deposited as NRRL B-59571), NRRL B50593 (also deposited as NRRL B -59572), NRRL B-50586 (also deposited as NRRL B-59565), NRRL B-50588 (also deposited as NRRL B-59567), NRRL B-50587 (also deposited as NRRL B-59566), NRRL B-50589 (also deposited as NRRL B-59568), NRRL B-50591 (also deposited as NRRL B-59570); NRRL B-50590 (also deposited as NRRL B-59569); NRRL B-50594 (also deposited as NRRL B50493); NRRL B-50726; NRRL B-50727; NRRL B-50728; NRRL B-50729; NRRL B-50730, and their cultures are within the scope of the invention.
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35/58 [0082] In one embodiment, the crop is a strain with the access number to the NRRL B-50592 deposit (also deposited as NRRL B59571). In another modality, the crop is a strain with the access number to the NRRL B-50593 deposit (also deposited as NRRL B-59572). In another modality, the crop is a strain with the access number to the NRRL B-50586 deposit (also deposited as NRRL B-59565). In another modality, the crop is a strain with the access number to the NRRL B-50588 deposit (also deposited as NRRL B-59567). In another modality, the crop is a strain with the access number to the NRRL B-50587 deposit (also deposited as NRRL B-59566). In another modality, the crop is a strain with the access number to the NRRL B-50589 deposit (also deposited as NRRL B-59568). In another modality, the crop is a strain with the access number to the NRRL B-50591 deposit (also deposited as NRRL B-59570). In another modality, the crop is a strain with the access number to the NRRL B-50590 deposit (also deposited as NRRL B-59569). In another modality, the crop is a strain with the access number to the NRRL B-50594 deposit (also deposited as NRRL B50493). In another modality, the crop is a strain with the access number to the NRRL B-50726 deposit. In another modality, the crop is a strain with the access number to the NRRL B-50727 deposit. In another modality, the crop is a strain with the access number to the NRRL B-50728 deposit. In another modality, the crop is a strain with the access number to the NRRL B-50729 deposit. In another modality, the crop is a strain with the access number to the NRRL B-50730 deposit.
Biological Material Deposit [0083] The following biological material was deposited under the Budapest Type American Culture Collection (ATCC) Treaty, 10801 University Blvd., Manassas, VA 20108, USA, and the Microbial Genomics and Bioprocessing Research Unit (NRRL ) National Center for Agricultural
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Utilization Research 1815 N. University Street, Peoria, IL 61604, USA and given the following accession number:
Table 1: Biological Material Deposit
Identification Access number Deposit Date Bradyrhizobia japonicum NRRL B-50592 NRRLB-59571 November 09, 2011March 08, 2011 Bradyrhizobia japonicum NRRL B-50593NRRL B-59572 November 09, 2011March 08, 2011 Bradyrhizobia japonicum NRRL B-50586NRRL B-59565 November 09, 2011March 08, 2011 Bradyrhizobia japonicum NRRL B-50588NRRL B-59567 November 09, 2011March 08, 2011 Bradyrhizobia japonicum NRRL B-50587NRRL B-59566 November 09, 2011March 08, 2011 Bradyrhizobia japonicum NRRL B-50589NRRL B-59568 November 09, 2011March 08, 2011 Bradyrhizobia japonicum NRRLB-50591NRRL B-59570 November 09, 2011March 08, 2011 Bradyrhizobia japonicum NRRL B-50590NRRL B-59569 November 09, 2011March 08, 2011 Bradyrhizobia japonicum NRRL B-50594NRRL B-50493 November 09, 2011March 08, 2011 Bradyrhizobia japonicum NRRL B-50726 March 09, 2012 Bradyrhizobia japonicum NRRL B-50727 March 09, 2012 Bradyrhizobia japonicum NRRL B-50728 March 09, 2012 Bradyrhizobia japonicum NRRL B-50729 March 09, 2012 Bradyrhizobia japonicum NRRL B-50730 March 09, 2012
* NRRL indicates deposit with Agricultural Research Service Culture
Collection, Peoria, IL.
[0084] The strain was deposited under conditions that guarantee that access to the crop will be available pending this patent application the one determined by the Commissioner of Patents and Trademarks to be entitled to that under 37 C.F.R. §1.14 and 35 U.S.C. §122. The deposit represents a pure culture of the deposited strain. The deposit is available as required by foreign patent laws in countries where counterparties to the order in question or its product are deposited. However, it must be understood that the availability of a deposit does not constitute a license to practice the invention in question to the detriment of the patent rights guaranteed by government action.
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37/58 [0085] The following examples are included for illustrative purposes only and are not intended to limit the scope of the invention.
EXAMPLES
Materials and methods
Medium [0086] YEM Agar (YEMA): (10 g / L of D-mannitol; 0.50 g / L of oxide yeast extract; 0.10 g / L of NaCl; 0.50 g / L K2HPO4; 0.20 g / L of MgSO4'7H2O; 12.0 g / L of Agar; pH ~ 6.8).
[0087] Liquid YEM: (10 g / L of D-mannitol; 0.50 g / L of oxide yeast extract; 0.10 g / L of NaCl; 0.50 g / L of K2HPO4; 0.20 g / L MgSO 4 -7H 2 O; pH ~ 6.8).
DNA Isolation Protocol [0088] For strains grown on the plates, a 1 pL loop of each strain of the plates was added individually in 100 pL of PrepMan® Ultra DNA isolation solution from applied biosystems. The solution was heated to 100 ° C for 10 minutes. Isolated DNA was used for PCR analysis.
[0089] For DNA isolated from the nodules, nodules were removed with forceps from the soybean roots and rinsed in diH 2 O. The nodules were placed individually in 100 μL of PrepMan® Ultra DNA isolation solution from the applied biosystems, broken apart, and heated at 100 ° C for 10 minutes using a 96-well PCR plate also from the applied biosystems. Disposable toothpicks were used to break open nodules to avoid cross contamination. Isolated DNA was used for PCR analysis.
PCR Protocol [0090] Polymerase chain reactions (PCR) were performed using Veriti® 96 well Fast Thermal Cycler applied biosystems. PCRs were adjusted for each strain. 2 pL of DNA was added to 0.5 pL of a 3 'nucleotide primer, 0.5 pL of a nucleotide primer
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5 ', 0.5 pL of Taq Polymerase (New England Biolabs, Inc.) and 21.5 pL of Platinum Blue PCR Supermix® (Invitrogen). The PCR mixture was heated to 94 ° C for 4 minutes. After denaturation, PCR was performed for 35 cycles with the following program: 94 ° C for 1 minute, 68 ° C or temperature (s) dependent on the nucleotide primer annealing for 1 minute, and extension of the reaction to 72 ° C for 1 minute. After the PCR program ended, 5 pL of PCR mix was run on a Lonza® FlashGel® system.
Strain Isolation Protocol [0091] In isolated strains, nodules were sterilized on the surface with 10% household bleach for 2 minutes. The nodules were rinsed in sterile water and then placed in a microcentrifugal tube with 250 µL of sterile water. Nodules were ground with sterile toothpicks and Rhizobium strains were released into the water. Two loops of 10 μL of water were streaked for single colonies on the YEMA plates. All plates were wrapped with Parafilm® and grown at 30 ° C in an Eppendorf Innova® 42R incubator. The growth time differed by isolate. Primary Classification Protocol [0092] Strains were first classified by two different protocols, that is, the “Soil Field Soil Protocol (Field Treated with USDA 532C)” and the “Untreated Field Protocol (Control)”. Each Protocol is described.
Soybean Field Soil Protocol (USDA 532C Treated Field) [0093] USDA 532C-coated soybean seeds were planted in various soils in all soybean growing regions in the United States, for example, South Dakota, South Dakota North, Georgia, Iowa, Nebraska, Illinois, Indiana, Texas, Kansas, Minnesota, etc. Soybean seeds treated with USDA 532C Bradyrhizobium japonicum were grown on these soils, harvested, and soybean nodules were analyzed using
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39/58 PCR analysis directly. Forty (40) nodules were collected from each soil sample. Individual soybean nodules were loaded into a single 96-well microtiter plate well. DNA from those individual soybean nodules was isolated directly from the nodules based on the procedure described above (See Materials and Methods: DNA Isolation Protocol).
[0094] PCR analysis using USDA 532C specific nucleotide primer 209 was performed directly on the 96 well plate (See Materials and Methods: PCR Protocol). The amplification of 209 nucleotide primer (0.9kb band) of the 40 nodules was calculated to determine the percentage of amplification. If the 0.9kb DNA amplification is less than or equal to 30% (that is, more than or equal to 70% of the PCR was negative for amplification of the 209 nucleotide primer), then the soil sample contained strains Bradyrhizobium japonicum with greater competitiveness than the USDA 532C strain. Soy nodules with less than or equal to 30% amplification contained native strains identified as more competitive than USDA 532C based on the procedure described (See Materials and Methods: Strain Isolation Protocol).
[0095] If more than 30% of soybean nodules were colonized by USDA 532C Bradyrhizobia japonicum strain, then the soil was considered unsuitable for isolation of unprecedented strain and the soil sample was completed. Untreated Field Protocol (Control) [0096] Nodules were obtained from USDA 532C untreated soybean fields in the following states: Arkansas, Georgia, Illinois, Indiana, Iowa, Oklahoma, Nebraska, Kansas, Missouri, and Texas. Strains Bradyrhizobium japonicum were isolated directly from these nodules by the Protocol described above (See Materials and Methods: Strain Isolation Protocol). Isolated strains were placed in direct competition with USDA 532C Bradyrhizobia japonicum strain for the “Competition Study Protocol” (See
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Materials and Methods: Competition Study Protocol). Isolated strains that occupied more than 70% of soy nodules when compared to the USDA 532C Bradyrhizobia japonicum strain, were selected for performance evaluation (See Materials and Methods: Performance Study Protocol). Competition Study Protocol [0097] Optical densities were determined. (Nanodrop® ND1000 Spectrophotometer) A 1: 1 USDA 532C inoculum ratio for each isolated strain was obtained. USDA 532C was diluted or concentrated to an optical density of 0.5 to 600 nm and 0.5 mL of USDA 532C inocula was set aside for each isolate. All strains isolated were either concentrated or diluted to an optical density of 0.5 to 600 nm using the following calculation: (0.5 of USDA 532C optical density) x (USDA 532C 0.5 mL) = (optical density of isolated strain) x (mL of isolated strain). 0.5 mL of USDA 532C was added to 0.5 mL of each isolate as separate treatments. Soybean seeds were coated with the inoculum mixture at a rate of 0.5 mL of inoculum mixture per 12 soybean seeds. The seeds were left to soak for 30 minutes. 5 of the 12 treated soybean seeds were planted in a Fafard® 3B Potting mixture in a 1 gallon pot. Gloves were used to plant the seeds and were changed between treatments. After planting, the remaining 7 treated soybean seeds were discarded.
[0098] During germination, pots were reduced to 3 plants. The plants were grown for 6-7 weeks in a greenhouse and cross contamination during the irrigation process was avoided. Temperatures ranging from approximately 23 ° C - 32 ° C. Irrigation was carried out based on "need". Nodules were collected from each treatment and used for DNA isolation and PCR analysis with USDA 532C specific nucleotide primer 209. See Materials and Methods: DNA Isolation Protocol and PCR Protocol.
Performance Study Protocol
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41/58 [0099] The performance study is a comparison of direct strain to strain performance between a single and commercially available isolated strain USDA 532C Bradyrhizobium japonicum. The isolated strain and the control strain (USDA 532C Bradyrhizobium japonicum strain) were streaked simultaneously on separate YEMA plates. The isolated strain and the control strain were separately inoculated in 5 mL of liquid YEM medium to obtain an initial optical density of 0.03 to 600 nm in each inoculum tube. (Nanodrop® ND1000 Spectrophotometer) the isolated strain and the control strain were incubated separately at 30 ° C for 3 days. After incubation, the inoculum for the isolated strain and the control strain was further diluted or concentrated to a final optical density of 0.5 to 600 nm in each inoculum tube (Nanodrop® ND1000 Spectrophotometer) to obtain a test treatment (strain isolated) and a control treatment (control strain. USDA 532C strain of Bradyrhizobium japonicum).
[00100] 0.75 mL of the test treatment was added to 32 soybean seeds. The treated seeds were left to soak for 30 minutes. After 30 minutes, 2 seeds were planted in 15 separate pots (4 ”x4” x6 ”) in a Fafard® 3B Potting mixture. Gloves were used to plant the seeds and were changed between treatments. After planting, the remaining 2 treated soybean seeds were discarded. This process was repeated for the control treatment.
[00101] In germination, the pots of the test and control treatments were reduced for a single plant. The plants were grown for 8-10 weeks in a greenhouse and cross contamination during the irrigation process was avoided. Temperatures ranging from approximately 23 ° C to 32 ° C. Irrigation was carried out on a “to the extent necessary” basis. After 8-10 weeks, pods were harvested and dried overnight at 80 ° C. Analysis with JMP® statistical software (SAS Institute, Inc.) was used to determine statistically significant performance improvement compared to strain
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USDA 532C Bradyrhizobium japonicum.
Temperature Profile Protocol [00102] Strains isolated from Bradyrhizobium japonicum were streaked on the YEMA plates (10 g / L of D-mannitol; 0.50 g / L of oxide yeast extract; 0.10 g / L of NaCl ; 0.50 g / L K2HPO4; 0.20 g / L MgSO4'7H2O; 12.0 g / L Agar; pH ~ 6.8) and incubated at 30 ° C and 35 ° C respectively for 7 days . The isolated strains were analyzed for their ability to grow isolated colonies.
Glyphosate Resistance Profile Protocol [00103] Strains isolated from Bradyrhizobium japonicum were streaked into 1 mM glyphosate, and 2 mM glyphosate, YEMA plates (10 g / L D-mannitol; 0.50 g / L Extract oxoid yeast; 0.10 g / L NaCl; 0.50 g / L K2HPO4; 0.20 g / L MgSO4'7H2O; 12.0 g / L Agar; pH ~ 6.8). The plates were incubated at 30 ° C for 7 days and the strains were analyzed for their ability to grow isolated colonies.
Antibiotic Profile Protocol [00104] Strains isolated from Bradyrhizobium japonicum were streaked in T in gentamicin (50 mg / L) YEMA, chloramphenicol (50 mg / L) YEMA, polymyxin B (100 mg / L) YEMA, carbenicillin ( 100 mg / L) YEMA, neomycin (50 mg / L) YEMA, and nalidixic acid (50 mg / L) YEMA. The plates were incubated at 30 ° C for 7 days and the strains were analyzed for their ability to grow isolated colonies.
Diversilab® PCR Protocol [00105] Diversilab® PCR was adjusted using the Diversilab Pseudomonas Kit® by BioMerieux. This kit contained proprietary nucleotide primers designed to amplify various portions of the genome to produce a fingerprint of multiple DNA amplifications. Each strain has a unique fingerprint and percentage similarity between strains can be determined using Diverilab software.
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43/58 [00106] The PCR was consequently configured. 2 pL of DNA was added to 18.0 pL of MM1 Re-PCR, 2.0 pL of nucleotide primer mixture, 0.5 pL of Taq Polymerase (New England Biolabs, Inc.) and 2.5 pL of buffer Taq Polymerase (New England Biolabs, Inc.) for a total volume of 25 µl. The PCR was heated to 94 ° C for 2 minutes and then run for 35 cycles according to the following: 94 ° C for 0.5 minutes, then 50 ° C for 0.5 minutes, and finally 70 ° C for 1.5 minutes. After the end of the 35 cycles, the total reaction was maintained at 70 ° C for 3 minutes. After the PCR analysis was completed, the PCR product was run on the Agilent® 2100 Series Bioanalyzer. Diversilab® DNA Reagents & Supplie Kit by BioMerieux was used to load PCR product onto the Diversilab® System chips. The kit was maintained according to the instructions. Before use, the case was adjusted to room temperature for 30 minutes before loading the Diversilab® chip. The Diversilab® chip was loaded in full accordance with all protocols and instructions provided. Upon completion of the loading of the Diversilab® chip, the chip was loaded onto the Agilent® 2100 Series Bioanalyzer and the analysis performed until completion.
Example 1
Exclusive nucleotide initiator project for USDA 532C Bradyrhizobium commercial strain [00107] A genetic identification method was developed to assess the competitiveness of USDA 532C Bradyrhizobium japonicum strain against commercial strains in the field. A nucleotide primer specific to USDA 532C has been identified and PCR technology has been used to efficiently assess the competitiveness of USDA 532C in the field.
[00108] USDA 532C complete genome sequencing was performed on Novozymes Davis. It was observed that twenty-five different DNA fragments had low homology with public sequences of
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Bradyrhizobium japonicum. DNA was isolated from B. japonicum strains (USDA 532C, P152, Brl73, Brl87, P190 and P194) grown on the plates according to the procedure described above (See Materials and Methods: DNA Isolation Protocol). Additional sequence analysis was performed on those twenty-five DNA fragments. Putative exclusive nucleotide primers for the USDA 532C strain were chosen and used for classification of a USDA 532C specific nucleotide primer by PCR against some representative Bradyrhizobium japonicum strains. After the PCR evaluation, a single nucleotide primer unique to USDA 532C was identified and was designated as p209.
[00109] The sequence of the 209 nucleotide primer was as follows:
SEQ ID NO: 1 - P209p5-TTGGGTTGAGCATGCCCACCCGGACGG, SEQ ID NO: 2 - P209p3-GTCTCAGTTGCCGAGCCCACGGCGC Specificity of the nucleotide primer [00110] The twenty-five nucleotide primers were individually tested for positive US2 identification. The nucleotide primers were further tested for specificity of USDA 532C by PCR using USDA 532C and 5 different native strains of B. japonicum (P152, Brl73, Brl87, P190, and P194) for comparison. Genome sequencing indicated that Br 187 and USDA 532C were genetically the same.
Table 2: Summary of nucleotide primer classification
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Initiator ofnucleotide USDA 532C P152 Brl73 Brl87 P190 P194 PCR temperature 787 - - - - - - 65 1114 + + + + + + 65 1181 + + + + + + 64 943 + + + + + + 60 1073 + + + + + + 65 125 + + 68 209 * + + 68 487 + + 68 567 + + 58 744 + + 65 811 + + 65 989 + + 69 1073 + + 69 989 a + + 64 893 + + 64 2254 + + + + 68 607 + + + + 68 389 + + + + 60 728 + + + + 65 869 + + + + 62 1424 ++ + + + 65 1181 + + + + + + 60 989 b ++ + + + 65 895 ++ + + + 65 943 +- + + - 64 * nucleotide primer 209 presented the clearest strands and was chosen for further evaluation.
[00111] Table 2 summarizes the observations (“+” indicates a positive identification of a PCR amplification band in the gel, indicates no DNA amplification).
[00112] Referring to Figure IA, isolated 209 nucleotide primer has been shown to be specific for USDA 532C and Brl87. Additional genetic testing has shown that USDA 532C and strain P187 Bradyrhizobium japonicum are identical (results not shown). The contents of the well (left to right) indicate the following native strains USDA 532C, P152, Brl73, Brl87, Brl90, Brl94, and the control scale. See figure IA.
[00113] The specificity of 209 nucleotide primer was tested against native strains P152, Brl73, Brl87, Brl90, Brl94, and USDA 532C. See figure 1B. PCR with nucleotide primer 209 was performed for 100 strains obtained from untreated beds in field experiments according to the previous method (See Materials and Methods: Untreated Field Protocol (Control)). USDA 532C Bradyrhizobium japonicum strain was not added to these beds. Of the strains tested, only 3
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46/58% of native strains could be amplified to a specific 0.9Kb band for nucleotide primer 209. These results demonstrated that nucleotide primer 209 could be used for specific detection of USDA 532C.
Example 2
Analysis and Isolation of Unpublished Strains [00114] Nucleotide primer 209 was used as a marker to indicate the presence or absence of colonization by USDA 532C Bradyrhizobia japonicum strain in soybean root nodules. Bands (ie, a 0.9Kb band) indicating the presence of 209 nucleotide primer represent a positive identification of USDA 532C Bradyrhizobia japonicum strain. See figure 2A. Figure 2A is an example of an example where the USDA 532C Bradyrhizobia japonicum strain is the dominant competitive strain for colonizing soybean nodules when compared to other native Rhizobial strains. In figure 2B, the number of bands indicating positive identification for nucleotide primer 209 and, therefore, the presence of USDA 532C Bradyrhizobia japonicum strain, is reduced compared to the total number of bands present for nucleotide primer 209 in figure 2A. Figure 2A and Figure 2B demonstrate that the presence or absence of 209 nucleotide primer can be used to determine whether USDA 532C is the dominantly competitive strain in the nodules of a soybean foot.
[00115] Isolated strains Bradyrhizobium japonicum were selected from the nodules according to both classification protocols (See Materials and Methods: Primary Classification Protocol). The selected strains were isolated from the nodules according to the isolation procedure (See Materials and Methods: Strain Isolation Protocol). Example 3 Head to Head Competition Evaluation
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47/58 [00116] All isolated strains were placed in a classification program designed to directly challenge the isolate's competitiveness against USDA 532C Bradyrhizobium japonicum strain in terms of nodule colonization capacity (See Materials and Methods: Competition Study Protocol ).
[00117] USDA 532C-specific isolated nucleotide primer 209 was used as a marker to indicate the presence or absence of colonization by USDA 532C Bradyrhizobia japonicum strain in soybean root nodules. Positive identification for nucleotide primer 209 indicated colonization of USDA 532C Bradyrhizobia japonicum strain in the nodules of the soybean root. On the contrary, the absence of bands indicating positive identification for nucleotide primer 209 indicated colonization of a native strain in the root nodules of soybean plants other than USDA 532C Bradyrhizobia japonicum. Isolated strains that showed colonization greater than 70% of the analyzed nodules were chosen for a second evaluation for confirmation. Strains were submitted to at least two rounds of competition evaluation. Through this procedure, more than 1,000 isolates were classified in terms of intensified competitiveness.
Example 4
Performance Evaluation [00118] The performance study is a direct strain-by-strain comparison of strains isolated to USDA 532C. Best performance was measured as a function of Dry Pod Weight (g). See Materials and Methods: Performance Study Protocol. Results are provided in Tables 3A - 3D
Table 3 A: Intensified Performance as a function of Dry Pod Weight (g)
Strain Percent Colonization Dry Pod Weight (g) NRRLB- 59571 85 5.92 NRRL B-59567 80 6.12 NRRL B-59572 85 6.05 NRRL B-59565 80 5.87 USDA532-C - 5.72
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48/58 [00119] Percent colonization was confirmed in triplicate studies and increased dry weight of pod was confirmed in duplicate studies for all strains.
Table 3B: Intensified Performance as a Function of Dry Pod Weight (g)
Strain Colonization percentage Dry weight pod (g) NRRL B- 50493 75 4.86 NRRL B-59570 80 5.30 USDA532-C - 5.45
[00120] Percent colonization was confirmed in triplicate studies and increased dry weight of pod was confirmed in duplicate studies for all strains.
Table 3C: Intensified Performance as a Function of Dry Pod Weight (g)
Strain Percent Colonization Dry pod weight (g) NRRL B-59566 85 5.30 NRRL B-59569 85 5.50 NRRL B-59568 95 5.69 USDA532-C - 4.69
[00121] Percent colonization was confirmed in triplicate studies and increased dry weight of pod was confirmed in duplicate studies for all strains.
Table 3D: Intensified Performance as a function of Dry Pod Weight (g)
Strain Colonization percentage Dry pod weight (g) NRRL B-50726 95 5.79 NRRL B-50727 85 5.02 NRRL B-50728 83 5.78 NRRL B-50729 83 5.94 NRRL B-50730 * 90 5.94 USDA532-C - 5.45
[00122] Percent colonization and increased dry weight of pod were confirmed in duplicate studies for all strains except NRRL B-50730 * which had only one test round.
[00123] Commercially available USDA 532C strain was used as a control for each assessment. Results from tables 3A-3D indicate that all but one of the isolated strains performed better when compared to the control, USDA 532C.
Example 5
Characterization Study
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49/58 [00124] Isolated strains Bradyrhizobium japonicum were additionally characterized based on temperature, glyphosate resistance, and antibiotic profiles (See Materials and Methods: Temperature Profile, Resistance Glyphosate Profile and Antibiotic Profile Protocols). Results provided in table 4.
Table 4: Characterization of Isolated Strains as a Function of
Temperature Profile, Glyphosate Resistance, and Antibiotic Resistance
Treatment NRRL B59565 NRRL B59572 NRRL B59567 NRRL B59566 NRRL B59570 NRRL B59568 NRRL B59569 NRRL B50493 NRRL B59571 USDA 532C 30 ° C + + + + + + + + + + 35 ° C + -+ + + - + - - 1.0 mM glyphosate + -- - + + + - - 2.0 mM glyphosate - - - + - - + - - Gentamycin + -- + - + + - - + Chloramphenicol + -+ + + + + - + Polymyxin B + + + + + + + + + + Carbenicillin + -- - - + - + - + Neomycin + - + + - - + + - + + Nalidixic acid - -+ - - + - - -
[00125] Table 4 summarizes the results (“+” indicates growth with isolated colonies, indicates no growth, and indicates few isolated colonies / minimal and sporadic growth). The results indicate that strains NRRL B-59570, NRRL B-59568, NRRL B-59565, NRRL B-59566 and NRRL B-50493 are tolerant to temperatures of substantially 35 ° C. The results further indicate that strains isolated NRRL B-59569, NRRL B-59568, NRRL B-59565, and NRRL B-50493 are naturally resistant to glyphosate. Strains NRRL B-59566 and NRRL B-59569 were found to have resistance to nalidixic acid.
Example 5
Development of DNA fingerprint [00126] Superior performance isolates were placed through DNA fingerprint analysis Diversilab® (See Materials and Methods: Diversilab® PCR Protocol). DNA was isolated from each strain according to the methods discussed (See Materials and Methods: DNA Isolation Protocol). Isolated DNA was used for PCR analysis.
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50/58 [00127] Results for the Diversilab DNA fingerprint analysis are shown in figures 3A - 3B. Results demonstrate that the isolated strains are unique strains and different strains than USDA 532C.
[00128] The present invention is described, at least in part, by the following numbered paragraphs:
1. A biologically pure culture of Bradyrhizobia japonicum selected from the group consisting of:
the strain with the access number to the NRRL B-50592 deposit; the strain with the access number to the NRRL B-50593 deposit;
the strain with the access number to the NRRL B-50586 deposit; the strain with the access number to the NRRL B-50588 deposit;
the strain with the access number to the NRRL B-50587 deposit; the strain with the access number to the NRRL B-50589 deposit;
the strain with the access number to the NRRL B-50591 deposit; the strain with the access number to the NRRL B-50590 deposit;
the strain with the access number to the NRRL B-50594 deposit; the strain with the access number to the NRRL B-50726 deposit;
the strain with the access number to the NRRL B-50727 deposit; the strain with the access number to the NRRL B-50728 deposit;
the strain with the access number to the NRRL B-50729 deposit; and the strain with the access number to the NRRL B-50730 deposit.
2. The strains of Bradyrhizobium of paragraph 1, in which the said strains are capable of promoting nitrogen fixation in a plant.
3. The strains of Bradyrhizobium from either of paragraphs 1-2, wherein said strains are tolerant to growth at a temperature of substantially 35 ° C.
4. The strains of Bradyrhizobium from any one of paragraphs 1-3, in which said strains are selected from the group consisting of:
the strain with the access number to the NRRL B-50591 deposit;
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51/58 the strain with the access number to the NRRL B-50589 deposit;
the strain with the access number to the NRRL B-50586 deposit;
the strain with the access number to the NRRL 50594 deposit; and a combination of at least two or more of the strains.
5. The strains of Bradyrhizobium from any of paragraphs 1-4, wherein said strains of Bradyrhizobium are naturally resistant to glyphosate.
6. The strains of Bradyrhizobium in paragraph 5, in which said strains are selected from the group consisting of:
the strain with the access number to the NRRL B-50590 deposit;
the strain with the access number to the NRRL B-50594 deposit; and a combination of at least two or more of the strains.
7. The strains of Bradyrhizobium from any one of paragraphs 1-6, in which said strains have intensified competitiveness to colonize a plant.
8. The strains of Bradyrhizobium of any of paragraphs 1-7, in which said strains are effective in promoting intensified growth of the plant.
9. The strains of Bradyrhizobium in any of the paragraphs
1-8, where intensified competitiveness includes at least 51% nodule occupation, for example, at least 55%, at least 60%, at least 65%, at least 70%, at least 75%, at least 80% at least 85%, at least 85%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97% , at least 98%, at least 99%, or 100% nodule occupation.
10. The strains of Bradyrhizobium of any of paragraphs 1-9, where effectiveness in promoting enhanced plant growth includes at least an increased plant yield measured in
Petition 870180133353, of 9/24/2018, p. 57/67
52/58 bushels / acre terms, increased fruit number, increased root number, increased root length, increased root mass, increased root volume, increased foliage area, increased plant support, increased plant vigor, and / or increased nitrogen fixation capacity (N2) when compared to a commercially available strain, for example, USDA 532C.
11. The strains of Bradyrhizobium from any of paragraphs 1-10, in which enhanced effectiveness in promoting soybean growth includes an increase in the total dry weight of soybean pods in said soybean foot when said total dry weight of soybean pods it is compared to the total dry weight of soybean pods in a soybean leg subjected to a commercially available strain, for example, commercial USDA 532C strain.
12. A composition comprising a strain of Bradyrhizobia japonicum selected from the group consisting of:
the strain with the access number to the NRRL B-50592 deposit; the strain with the access number to the NRRL B-50593 deposit;
the strain with the access number to the NRRL B-50586 deposit; the strain with the access number to the NRRL B-50588 deposit;
the strain with the access number to the NRRL B-50587 deposit; the strain with the access number to the NRRL B-50589 deposit;
the strain with the access number to the NRRL B-50591 deposit; the strain with the access number to the NRRL B-50590 deposit;
the strain with the access number to the NRRL B-50594 deposit; the strain with the access number to the NRRL B-50726 deposit;
the strain with the access number to the NRRL B-50727 deposit; the strain with the access number to the NRRL B-50728 deposit;
the strain with the access number to the NRRL B-50729 deposit;
the strain with the access number to the NRRL B-50730 deposit; and a combination of at least two or more of the strains and a carrier
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53/58 agronomically suitable.
13. The composition of paragraph 12, wherein said composition includes one or more signal molecules.
14. The composition of paragraph 13, wherein the plant signal molecule is a lipo-chito-oligosaccharide (LCO).
15. The composition of any of paragraphs 13-14, where the LCO is synthetic.
16. The composition of any of paragraphs 13-15, wherein the LCO is recombinant.
17. The composition of any of paragraphs 13-16, where the LCO is naturally occurring.
18. The composition of any of paragraphs 13-17, in which the LCO is obtained from a species of Rhizobia selected from Rhizobium spp., Bradyrhizobium spp., Sinorhizobium spp. and Azorhizobium spp.
19. The composition of any of paragraphs 13-18, in which the LCO is obtained from Bradyrhizobium japonicum.
20. The composition of any of paragraphs 13-19, in which the LCO is obtained from a mycorrhizal arbuscular fungus.
21. The composition of paragraph 13, in which the signal molecule of the plant is a chitinous compound.
22. The composition of paragraph 22, wherein the chitinous compound is a chito-oligomer (CO).
23. The composition of any of paragraphs 21-22, where CO is synthetic.
24. The composition of any of paragraphs 21-23, wherein the CO is recombinant.
25. The composition of any of paragraphs 21-24, where CO is naturally occurring.
26. The composition of paragraph 13, in which the signal molecule of
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54/58 plant is a flavonoid.
27. The composition of paragraph 13, in which the signal molecule of the plant is jasmonic acid or a derivative thereof.
28. The composition of paragraph 13, wherein the signal molecule of the plant is linoleic acid or a derivative thereof.
29. The composition of paragraph 13, wherein the signal molecule of the plant is linoleic acid or a derivative thereof.
30. The composition of paragraph 13, in which the signal molecule of the plant is a carricine.
31. The composition of any of paragraphs 12-30, wherein the composition includes at least two different plant signal molecules.
32. The composition of any of paragraphs 12-31, wherein the composition includes at least one agronomically beneficial agent.
33. The composition of paragraph 32, where the agronomically beneficial agent is an herbicide, insecticide or fungicide.
34. The composition of paragraph 33, wherein the agronomically beneficial agent is at least one phosphate solubilizing microorganism.
35. The composition of paragraph 34, wherein at least one phosphate solubilizing microorganism comprises a strain of the Penicillium fungus.
36. The composition of paragraph 35, wherein at least one phosphate solubilizing microorganism comprises a strain of P. bilaiae.
37. The composition of paragraph 36, in which the P. bilaiae strain is selected from the group consisting of NRRL 50162, NRRL 50169, ATCC 20851, ATCC 22348, and ATCC 18309.
38. The composition of paragraph 34, in which at least one phosphate solubilizing microorganism comprises a strain of
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55/58
P. gaestrivorus.
39. The composition of paragraph 38, in which the P. gaestrivorus strain is NRRL 50170.
40. A method for isolating selected bacterial strain (s) of the genus consisting of Rhizobium and Bradyrhizobium with intensified competitiveness to colonize a leguminous plant and effectiveness in promoting intensified growth of leguminous plant comprising:
The. obtain a bacterial strain (s) from a soil sample;
B. subjecting said bacterial strain (s) and a commercially available strain (s), for example a commercial USDA 532C strain, to a leguminous plant;
ç. selecting the so-called bacterial strain (s) which is (are) more competitive than the commercially available strain to occupy the nodules of a leguminous plant;
f. analyze the selected bacterial strain (s) that is (are) more competitive than the commercially available strain to occupy the nodules of a leguminous plant for those bacterial strain (s) ) with an effectiveness in promoting intensified growth of leguminous plants; and
d. isolate said bacterial strain (s) with effectiveness in promoting intensified growth of leguminous plants.
41. The bacterial strain isolated from paragraph 40, wherein said bacterial strain is a Bradyrhizobium spp.
42. The Bradyrhizobium strain isolated from paragraph 41, in which the said Bradyrhizobium spp. is a Bradyrhizobium japonicum strain.
43. The Bradyrhizobium strain isolated from any of paragraphs 41-42, wherein said strain is a Bradyrhizobia japonicum strain selected from the group consisting of:
the strain with the access number to the NRRL B-50592 deposit;
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56/58 the strain with the access number to the NRRL B-50593 deposit;
the strain with the access number to the NRRL B-50586 deposit;
the strain with the access number to the NRRL B-50588 deposit;
the strain with the access number to the NRRL B-50587 deposit;
the strain with the access number to the NRRL B-50589 deposit;
the strain with the access number to the NRRL B-50591 deposit;
the strain with the access number to the NRRL B-50590 deposit;
the strain with the access number to the NRRL B-50594 deposit;
the strain with the access number to the NRRL B-50726 deposit;
the strain with the access number to the NRRL B-50727 deposit;
the strain with the access number to the NRRL B-50728 deposit;
the strain with the access number to the NRRL B-50729 deposit;
the strain with the access number to the NRRL B-50730 deposit; and a combination of at least two or more of the strains.
44. The method of any of paragraphs 40-43, in which the isolated Bradyrhizobia japonicum strain is capable of fixing nitrogen in a plant.
45. The method of any of paragraphs 40-44, wherein the isolated Bradyrhizobia japonicum strain is tolerant to a growth temperature of substantially 35 ° C.
46. The method of paragraph 45, in which the isolated Bradyrhizobia japonicum strain is selected from the group consisting of:
the strain with the access number to the NRRL B-50591 deposit;
the strain with the access number to the NRRL B-50589 deposit;
the strain with the access number to the NRRL B-50586 deposit;
the strain with the access number to the NRRL 50594 deposit; and a combination of at least two or more of the strains.
47. The method of any of paragraphs 40-46, in which the Bradyrhizobia japonicum strain has a natural resistance to glyphosate.
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57/58
48. The method of paragraph 47, in which the isolated Bradyrhizobia japonicum strain is selected from the group consisting of:
the strain with the access number to the NRRL B-50590 deposit;
the strain with the access number to the NRRL B-50594 deposit; and a combination of at least two or more of the strains.
49. A method of enhancing plant growth, comprising treating a seed, seedling, root, plant, soil, or combinations thereof with a composition as defined in any of paragraphs 1-39.
50. The method according to paragraph 49, in which the seed, seedling, root, or plant is leguminous.
51.0 method according to paragraph 50, in which the seed, seedling, root, or plant is a seed, seedling, root, or soybean plant.
52. The method of any of paragraphs 49-51, in which said composition is added to the soil in an amount of 1 χ 10 8 to 1 χ 10 13 colony formation units per hectare, preferably 2 χ 10 11 a 6 x 10 11 colony formation units per hectare.
53. The method according to any of paragraphs 49-52, wherein said composition is introduced as a seed coat comprising 1 χ 10 2 to 1 χ 10 8 , preferably 1 χ 10 4 to 1 χ 10 5 training units colony per seed.
[00129] The invention described and claimed here should not be limited in scope by the specific modalities disclosed here, since these modalities are intended to illustrate the various aspects of the invention. Any equivalent modality must be within the scope of this invention. However, several modifications of the invention in addition to those shown and described here will become apparent to those in the art from the previous description. Such modifications must also be within the scope of the appended claims. In the event of a conflict, the present disclosure including definitions will prevail.
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58/58 [00130] Several references are cited here, the disclosures of which are incorporated by the reference in its entirety.
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1/2
权利要求:
Claims (11)
[1]
1. Composition, characterized by the fact that it comprises a strain of Bradyrhizobia japonicum selected from the group consisting of:
the strain with the access number to the NRRL B-50592 deposit;
the strain with the access number to the NRRL B-50593 deposit;
the strain with the access number to the NRRL B-50586 deposit;
the strain with the access number to the NRRL B-50588 deposit;
the strain with the access number to the NRRL B-50587 deposit;
the strain with the access number to the NRRL B-50589 deposit;
the strain with the access number to the NRRL B-50591 deposit;
the strain with the access number to the NRRL B-50590 deposit;
the strain with the access number to the NRRL B-50594 deposit;
the strain with the access number to the NRRL B-50726 deposit;
the strain with the access number to the NRRL B-50727 deposit;
the strain with the access number to the NRRL B-50728 deposit;
the strain with the access number to the NRRL B-50729 deposit;
the strain with the access number to the NRRL B-50730 deposit; and a combination of at least two or more of the strains and an agronomically suitable carrier, the carrier consisting of a peat-based powder or granule.
[2]
Composition according to claim 1, characterized in that said composition includes one or more signal molecules.
[3]
Composition according to claim 2, characterized by the fact that the signal molecule of the plant is a lipo-chito-oligosaccharide, a chitinous compound, a flavonoid, or a carricine.
[4]
Composition according to claim 2, characterized by the fact that the signal molecule of the plant is jasmonic acid, linoleic acid, lionolenic acid or a derivative thereof.
[5]
Composition according to any one of claims 1 to 4, characterized by the fact that the composition includes at least
Petition 870180133353, of 9/24/2018, p. 65/67
2/2 less an agronomically beneficial agent.
[6]
Composition according to claim 5, characterized by the fact that the agronomically beneficial agent is at least one phosphate solubilizing microorganism.
[7]
7. Method for enhancing plant growth, characterized by the fact that it comprises treating a seed, seedling, root, plant, soil, or combinations thereof with a composition as defined in any one of claims 1 to 6.
[8]
8. Method according to claim 7, characterized by the fact that the seed, seedling, root, or plant is leguminous.
[9]
9. Method according to claim 8, characterized in that the seed, seedling, root, or plant is a soybean seed, seedling, root or plant.
[10]
Method according to any one of claims 7 to 9, characterized in that said composition is added to the soil in an amount of 1 x 10 8 to 1 x 10 13 colony forming units per hectare, preferably 2 x 10 11 to 6 x 10 11 colony formation units per hectare.
[11]
Method according to any one of claims 7 to 10, characterized in that said composition is introduced as a seed coating comprising 1 x 10 2 to 1 x 10 8 , preferably 1 x 10 4 to 1 x 10 5 colony forming units per seed.
Petition 870180133353, of 9/24/2018, p. 66/67
1/4
FIGURE 1A
FIGURE 1B
2/4
FIGURE 2B
3/4
Diuersilsb ο 5.4 PC «612
Sample ID key
138
P140
184
142
130
198
135
60 - SO 90 100% similarity
FIGURE 3A
4/4
Sample ID key
PC «70 $
142
13 »
138
318
278
727
378
138
518
145
184
135
II
FIGURE 3B
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公开号 | 公开日
CA2831919A1|2012-10-04|
US9586870B2|2017-03-07|
BR112013024609A8|2018-01-23|
US20150239789A1|2015-08-27|
AU2012236248B2|2015-07-09|
US20120252672A1|2012-10-04|
US8999698B2|2015-04-07|
JP2014515607A|2014-07-03|
KR20140030155A|2014-03-11|
JP2016041737A|2016-03-31|
JP6068599B2|2017-01-25|
CN103648284B|2016-09-21|
CN103648284A|2014-03-19|
EP2690959B1|2016-03-23|
RU2017103899A|2019-01-18|
AU2012236248A1|2013-09-26|
KR101729123B1|2017-05-02|
EP2690959A1|2014-02-05|
JP2017063793A|2017-04-06|
ZA201306998B|2014-05-28|
AU2015210432B2|2017-03-30|
ES2573779T3|2016-06-10|
KR101869299B1|2018-07-20|
AR085925A1|2013-11-06|
JP5837678B2|2015-12-24|
RU2013148585A|2015-05-10|
KR20170048600A|2017-05-08|
JP6220040B2|2017-10-25|
US20160374349A1|2016-12-29|
WO2012135704A1|2012-10-04|
AU2015210432A1|2015-09-03|
US9975816B2|2018-05-22|
JP6581161B2|2019-09-25|
US20180237354A1|2018-08-23|
RU2611199C2|2017-02-21|
CA2831919C|2020-02-25|
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法律状态:
2018-06-26| B06A| Notification to applicant to reply to the report for non-patentability or inadequacy of the application [chapter 6.1 patent gazette]|
2018-10-09| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
2018-11-27| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 30/03/2012, OBSERVADAS AS CONDICOES LEGAIS. |
优先权:
申请号 | 申请日 | 专利标题
US201161470145P| true| 2011-03-31|2011-03-31|
US61/470,145|2011-03-31|
US201261583413P| true| 2012-01-05|2012-01-05|
US61/583,413|2012-01-05|
PCT/US2012/031584|WO2012135704A1|2011-03-31|2012-03-30|Competitive and effective bradyrhizobium japonicum strains|
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