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Medicago root nodule microbiomes: insights into a complex ecosystem with potential candidates for plant growth promotion

Martínez-Hidalgo, Pilar (author)
Departments of Molecular, Cell and Developmental Biology, UCLA, 621 Charles E. Young Drive, CA, Los Angeles, United States; Universidad Rey Juan Carlos, calle Tulipán s/n, Móstoles, Madrid, Spain
Humm, Ethan A. (author)
Departments of Molecular, Cell and Developmental Biology, UCLA, 621 Charles E. Young Drive, CA, Los Angeles, United States
Still, David W. (author)
Department of Plant Science, California State Polytechnic University, CA, Pomona, United States
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Shi, Baochen (author)
Molecular and Medical Pharmacology, UCLA, CA, Los Angeles, United States
Pellegrini, Matteo (author)
Departments of Molecular, Cell and Developmental Biology, UCLA, 621 Charles E. Young Drive, CA, Los Angeles, United States; Molecular Biology Institute, UCLA, CA, Los Angeles, United States
de la Roca, Gabriela (author)
Departments of Molecular, Cell and Developmental Biology, UCLA, 621 Charles E. Young Drive, CA, Los Angeles, United States
Veliz, Esteban (author)
Departments of Molecular, Cell and Developmental Biology, UCLA, 621 Charles E. Young Drive, CA, Los Angeles, United States; Department of Plant Biology, University of California-Davis, CA, Davis, United States
Maymon, Maskit (author)
Departments of Molecular, Cell and Developmental Biology, UCLA, 621 Charles E. Young Drive, CA, Los Angeles, United States
Bru, Pierrick (author)
Departments of Molecular, Cell and Developmental Biology, UCLA, 621 Charles E. Young Drive, CA, Los Angeles, United States
Huntemann, Marcel (author)
DOE Joint Genome Institute, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, CA, Berkeley, United States
Clum, Alicia (author)
DOE Joint Genome Institute, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, CA, Berkeley, United States
Palaniappan, Krishnaveni (author)
DOE Joint Genome Institute, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, CA, Berkeley, United States
Varghese, Neha (author)
DOE Joint Genome Institute, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, CA, Berkeley, United States
Mukherjee, Supratim (author)
DOE Joint Genome Institute, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, CA, Berkeley, United States
Reddy, T.B.K. (author)
DOE Joint Genome Institute, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, CA, Berkeley, United States
Daum, Chris (author)
DOE Joint Genome Institute, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, CA, Berkeley, United States
Ivanova, Natalia N. (author)
DOE Joint Genome Institute, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, CA, Berkeley, United States
Kyrpides, Nikos C. (author)
DOE Joint Genome Institute, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, CA, Berkeley, United States
Shapiro, Nicole (author)
DOE Joint Genome Institute, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, CA, Berkeley, United States
Eloe-Fadrosh, Emiley A. (author)
DOE Joint Genome Institute, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, CA, Berkeley, United States
Hirsch, Ann M. (author)
Departments of Molecular, Cell and Developmental Biology, UCLA, 621 Charles E. Young Drive, CA, Los Angeles, United States; Molecular Biology Institute, UCLA, CA, Los Angeles, United States
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Departments of Molecular, Cell and Developmental Biology, UCLA, 621 Charles E Young Drive, CA, Los Angeles, United States; Universidad Rey Juan Carlos, calle Tulipán s/n, Móstoles, Madrid, Spain Departments of Molecular, Cell and Developmental Biology, UCLA, 621 Charles E. Young Drive, CA, Los Angeles, United States (creator_code:org_t)
2021
2021
English.
In: Plant and Soil. - : Springer. - 0032-079X .- 1573-5036.
Related links:
https://urn.kb.se/re...
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https://doi.org/10.1...
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • Purpose: Studying the legume nodule microbiome is important for understanding the development and nutrition of the plants inhabited by the various microbes within and upon them. We analyzed the microbiomes of these underground organs from both an important crop plant (Medicago sativa) and a related legume (M. polymorpha) using metagenomic and culture-based techniques to identify the main cultivatable contributors to plant growth enhancement.Methods: Using high-throughput sequencing, culturing, and in planta techniques, we identified and analyzed a broad population of the bacterial taxa within Medicago nodules and the surrounding soil.Results: Fifty-one distinct bacterial strains were isolated and characterized from nodules of both Medicago species and their growth-promoting activities were studied. Sequencing of 16S rRNA gene amplicons showed that in addition to Ensifer, the dominant genus, a large number of Gram-positive bacteria belonging to the Firmicutes and Actinobacteria were also present. After performing ecological and plant growth-promoting trait analyses, selecting the most promising strains, and then performing in planta assays, we found that strains of Bacillus and Micromonospora among others could play important roles in supporting the growth, health, and productivity of the host plant.Conclusion: To our knowledge, the comparison of the biodiversity of the microbiota of undomesticated vs. cultivated Medicago roots and nodules is novel and shows the range of potential Plant Growth-Promoting Bacteria that could be used for plants of agricultural interest. These and other nodule-isolated microbes could also serve as inoculants with rhizobia with the goal of replacing synthetic fertilizers and pesticides for sustainable agriculture.

Subject headings

NATURVETENSKAP  -- Biologi -- Botanik (hsv//swe)
NATURAL SCIENCES  -- Biological Sciences -- Botany (hsv//eng)

Keyword

Bacterial inoculants
Medicago
Plant growth promoting bacteria
Root nodule microbiome

Publication and Content Type

ref (subject category)
art (subject category)

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