mesorhizobium septentrionale mesorhizobium septentrionale mesorhizobium septentrionale is a gram-negative, aerobic, non-spore-forming bacteria from the genus mesorhizobium which was isolated from astragalus adsurgens in china. mesorhizobium septentrionale scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: phyllobacteriaceae genus: mesorhizobium species: m. septentrionale binomial name mesorhizobium septentrionalegao et al. 2004 type strain ccbau 11014, hambi 2582, lmg 23930, sdw014, strain sdw014