bradyrhizobium jicamae bradyrhizobium jicamae bradyrhizobium jicamae is a gram-negative, strictly aerobic bacteria from the genus bradyrhizobium. bradyrhizobium jicamae scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: nitrobacteraceae genus: bradyrhizobium species: b. jicamae binomial name bradyrhizobium jicamaeramírez-bahena et al. 2009