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Nodule bacteria increase the resistance of host plants to abiotic stress factors; however, the role of the genetic potential of rhizobia in the formation of productive salt-tolerant plant-microbial symbiosis remains underestimated. The aim of the study was to evaluate the pool of genes responsible for the salt tolerance of the alfalfa microsymbiont, Sinorhizobium meliloti, using the DNA microarray technique, phenotype microarray (PM), NGS and NNGS-technologies and genome mining (antismash 5.0). As a result of the ...

Genomes of alfalfa root nodule bacteria, Sinorhizobium meliloti, symbionts of alfalfa are enriched in non-symbiotic (cryptic) plasmids, which gene pool is remained weakly studied. S. meliloti strains are significantly varied in number and size of these plasmids. The goal of the study was to assess the occurrence of phage-related sequences (PRS) on cryptic plasmids. Whole genome sequences of 12 S. meliloti strains native to Caucasian and Kazakhstan centers of alfalfa diversity (NCG and PAG, correspondingly) were st...

Sinorhizobium meliloti are agriculturally valuable species of soil bacteria that form nitrogen-fixing symbiosis with alfalfa plants. Global climate changes lead to an increase of agricultural areas subjected to salinity. Current knowledge about about high-salt stress impact on soil saprophitic root nodulated microsymbionts of legumes is weakly studied and rhizobia gene pool responsible for salt tolerance are fragment and far from clear. An increase of bacteria nonspecific resistance (immune status) to unfavorable ...

Legumes are a unique source of protein for food and feed industry. Legumes synthesize protein valuable for living organisms using atmospheric nitrogen which they can fix due to their symbiosis with root nodule bacteria. The formation of plant-microbial symbiotic systems depends on complementary interaction of signaling molecules of both symbionts. Rhizobia signaling molecules are lipochitooligosaccharides, so called Nod factors. The synthesis of core part of Nod factor molecule is determined by nodA, nodB and nodC...

Symbiotic nitrogen fixation is the most environmentally friendly method for the accumulation of biologically bound nitrogen. Nitrogen fixation is carried out by bacteria, including from the class of ?-proteobacteria. Global climate changes lead to an increase of agricultural areas subjected to salinity. Current knowledge about the effect of high-salt stress on nitrogen-fixing symbiotic ?-proteobacteria has the appearance of a puzzle. The genetic mechanisms determining salt tolerance have been studied in the most d...