rhizobium phaseoli rhizobium phaseoli rhizobium phaseoli is a root nodule bacterium. rhizobium phaseoli scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: rhizobiaceae genus: rhizobium species: r. phaseoli binomial name rhizobium phaseolidangeard 1926 (approved lists 1980) type strain atcc 14482dsm 30137ifo 14785jcm 20683nbrc 14785nrrl l-321vkm b-1966