[Genetic characterization of wild leguminous nodular bacteria living in the South Urals].

Genetic diversity and phylogeny of rhizobia that nodulate 18 species of wild-growing bean plants of South Urals from 8 genera belonging to 4 tribes (Loteae, Genisteae, Galegeaev and Hedysareae) was studied. It was demonstrated that for the wild-growing plants of Galegeae and Hedysareae tribes symbiotic interaction with various strains of nodule bacteria that closely related to bacteria of Mesorhizobium sp. was typical of the plants of Genisteae tribe--to bacteria of Bradyrhizobium sp. In the nodules of Lortus ucrainicus from Loteae tribe we have found a rhizobium that is closely related to the bacteria of Mesorhizobium sp., and at Coronilla varia rhizobia strains obtained by us were close by sequence of a 16S pRNA gene to Rhizobium sp. In the nodules of some kinds of the investigated plants we found also minor species of a rhizobia, which structure is under the great influence of conditions of the host plant growth.