Nine bacterial strains isolated from root nodules of were compared with 41 reference strains, including the type strains of the type species of the genera , and , by performing a numerical analysis of 200 phenotype features. Representative strains belonging to different clusters were further compared with similar bacteria by using data from gel electrophoresis of whole-cell proteins, DNA G+C content data, and DNA-DNA hybridization data. The rhizobial strains isolated from nodules of constitute a distinct homology group that is quite different from previously described , and species and from strains isolated from other species. We propose the name sp. nov. for the strains isolated from . Type strain CCBAU 2609 (= 103) has been deposited in the Culture Collection of Beijing Agricultural University, Beijing, People's Republic of China.


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