bradyrhizobium lablabi bradyrhizobium lablabi bradyrhizobium lablabi is a gram-negative, aerobic, non-spore-forming bacteria from the genus of bradyrhizobium. which was isolated from lablab purpureus in the anhui province in china. bradyrhizobium lablabi scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: nitrobacteraceae genus: bradyrhizobium species: b. lablabi binomial name bradyrhizobium lablabichang et al. 2011 type strain ccbau 23086, hambi 3052, lmg 25572