info:eu-repo/semantics/article
Stable symbiotic nitrogen fixation under water-deficit field conditions by a stress-tolerant alfalfa microsymbiont and its complete genome sequence : Short communication
Fecha
2017-12Autor
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
Resumen
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.