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

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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Detalles Bibliográficos
Autores: Jozefkowicz, Cintia, Brambilla, Silvina Maricel, Frare, Romina Alejandra, Stritzler, Margarita, Piccinetti, Carlos, Puente, Mariana L, Berini, Carolina Andrea, Pérez, Pedro Reyes, Soto, Gabriela Cynthia, Ayub, Nicolás Daniel
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2017
País:Argentina
Institución:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/41413
Acceso en línea:http://hdl.handle.net/11336/41413
Access Level:acceso abierto
Palabra clave:Sinorhizobium Meliloti
Alfalfa
Complete Genome
Glycine Betaine
https://purl.org/becyt/ford/2.8
https://purl.org/becyt/ford/2
Descripción
Sumario: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-fixingbacterium.

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