beijerinckia beijerinckia beijerinckia is a free living nitrogen-fixing aerobic microbe. it has abundant of nitrogenase enzyme capable of nitrogen reduction. beijerinckia scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: beijerinckiaceae genus: beijerinckiaderx 1950 type species beijerinckia indica species b. derxii beijerinckia derxii subsp. derxii beijerinckia derxii subsp. venezuelae b. doebereinerae b. indica beijerinckia indica subsp. indica beijerinckia indica subsp. lacticogenes b. mobilis beijerinckia is a genus of bacteria from the family of beijerinckiaceae. beijerinckia named after m.w. beijerinck, the dutch microbiologist (1851–1931).