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Stable symbiotic nitrogen fixation under water-deficit field conditions by a stress-tolerant alfalfa microsymbiont and its complete genome sequence : Short communication

We here characterized the stress-tolerant alfalfa microsymbiont Sinorhizobium meliloti B401. B401-treated plants showed high nitrogen fixation rates under humid and semiarid environments. The production of glycine betaine in isolated bacteroids positively correlated with low precipitation levels, su...

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Main Authors: Jozefkowicz, Cintia, Brambilla, Silvina Maricel, Frare, Romina Alejandra, Stritzler, Margarita, Piccinetti, Carlos Fabian, Puente, Mariana Laura, Berini, Carolina Andrea, Reyes Perez, Pedro Jose, Soto, Gabriela Cinthia, Ayub, Nicolás Daniel
Format: info:eu-repo/semantics/article
Language:Inglés
Published: 2018
Subjects:
Medicago Sativa
Fijación del Nitrógeno
Déficit de Humedad en el Suelo
Simbiontico
Secuencia Nucleotídica
Nitrogen Fixation
Soil Water Deficit
Symbionts
Nucleotide Sequence
Alfalfa
Secuencia Genómica
Online Access:http://hdl.handle.net/20.500.12123/1974
https://www.sciencedirect.com/science/article/pii/S0168165617317029
https://doi.org/10.1016/j.jbiotec.2017.10.007
Summary:We here characterized the stress-tolerant alfalfa microsymbiont Sinorhizobium meliloti B401. B401-treated plants showed high nitrogen fixation rates under humid and semiarid environments. The production of glycine betaine in isolated bacteroids positively correlated with low precipitation levels, suggesting that this compound acts as a critical osmoprotectant under field conditions. Genome analysis revealed that strain B401 contains alternative pathways for the biosynthesis and uptake of glycine betaine and its precursors. Such genomic information will offer substantial insight into the environmental physiology of this biotechnologically valuable nitrogen-fixing bacterium.

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