mesorhizobium alhagi mesorhizobium alhagi mesorhizobium alhagi is a gram-negative, aerobic non-spore-forming, motile bacteria from the genus of mesorhizobium which was isolated from wild alhagi sparsifolia in north-western china. mesorhizobium alhagi scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: phyllobacteriaceae genus: mesorhizobium species: m. alhagi binomial name mesorhizobium alhagichen et al. 2010 type strain accc 15461, ccnwxj12-2, hambi 3019