mesorhizobium caraganae mesorhizobium caraganae mesorhizobium caraganae is a gram-negative, aerobic, non-spore-forming, motile bacteria from the genus of mesorhizobium which was isolated from root nodules of caragana microphyllain in the beipiao city in the liaoning province in china. mesorhizobium caraganae scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: phyllobacteriaceae genus: mesorhizobium species: m. caraganae binomial name mesorhizobium caraganaeguan et al. 2008 type strain ccbau 11299, hambi 2990, lmg 24397