bradyrhizobium subterraneum bradyrhizobium subterraneum bradyrhizobium subterraneum is a nitrogen-fixing bacterium from the genus of bradyrhizobium which has been isolated from the effective nodules of the peanut arachis hypogaea. bradyrhizobium subterraneum scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: nitrobacteraceae genus: bradyrhizobium species: b. subterraneum binomial name bradyrhizobium subterraneumgronemeyer et al. 2015 type strain 54-1-1, 54-2-1, 57-2-1