bradyrhizobium retamae bradyrhizobium retamae bradyrhizobium retamae is a bacterium from the genus of bradyrhizobium. bradyrhizobium retamae scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: nitrobacteraceae genus: bradyrhizobium species: b. retamae binomial name bradyrhizobium retamaeguerrouj et al. 2014