Rhizobia Isolated from the Relict Legume Represent a Genetically Specific Group within biovar .

Twenty-two rhizobia strains isolated from three distinct populations (North Ossetia, Dagestan, and Armenia) of a relict legume were analysed to determine their position within biovar (). These bacteria are described as symbionts of four plant genera , , , and from the Fabeae tribe, of which Vavilovia is considered to be closest to its last common ancestor (LCA). In contrast to biovar , bacteria from biovar () inoculate plants from the Trifolieae tribe.

Search for Ancestral Features in Genomes of bv. Strains Isolated from the Relict Legume .

is a relict leguminous plant growing in hard-to-reach habitats in the rocky highlands of the Caucasus and Middle East, and it is considered as the putative closest living relative of the last common ancestor (LCA) of the Fabeae tribe. Symbionts of belonging to bv. compose a discrete group that differs from the other strains, especially in the nucleotide sequences of the symbiotically specialised () genes.

sp. nov. a new species of slow-growing bacteria isolated from root nodules of the relict species (Pall.) Poir. originating from Mongolia.

Two Gram-stain-negative strains, RCAM04680 and RCAM04685, were isolated from root nodules of the relict legume (Pall.) Poir. originating from the south-western shore of Lake Khuvsgul (Mongolia).

Phyllobacterium zundukense sp. nov., a novel species of rhizobia isolated from root nodules of the legume species Oxytropis triphylla (Pall.) Pers.

Gram-negative strains Tri-36, Tri-38, Tri-48 and Tri-53 were isolated from root nodules of the relict legume Oxytropis triphylla (Pall.) Pers. originating from Zunduk Cape (Baikal Lake region, Russia).

Taxonomically Different Co-Microsymbionts of a Relict Legume, Oxytropis popoviana, Have Complementary Sets of Symbiotic Genes and Together Increase the Efficiency of Plant Nodulation.

Ten rhizobial strains were isolated from root nodules of a relict legume Oxytropis popoviana Peschkova. For identification of the isolates, sequencing of rrs, the internal transcribed spacer region, and housekeeping genes recA, glnII, and rpoB was used. Nine fast-growing isolates were Mesorhizobium-related; eight strains were identified as M.

Microvirga ossetica sp. nov., a species of rhizobia isolated from root nodules of the legume species Vicia alpestris Steven.

Gram-stain-negative strains V5/3MT, V5/5K, V5/5M and V5/13 were isolated from root nodules of Vicia alpestris plants growing in the North Ossetia region (Caucasus). Sequencing of the partial 16S rRNA gene (rrs) and four housekeeping genes (dnaK, gyrB, recA and rpoB) showed that the isolates from V. alpestris were most closely related to the species Microvirga zambiensis (order Rhizobiales, family Methylobacteriaceae) which was described for the single isolate from root nodule of Listia angolensis growing in Zambia.