pleomorphomonas diazotrophica pleomorphomonas diazotrophica pleomorphomonas diazotrophica is a gram-negative, aerobic, pleomorphic and nitrogen-fixing bacterium species from the genus pleomorphomonas which has been isolated from root tissue of the plant jatropha curcas at the agrotechnology experimental station in singapore. pleomorphomonas diazotrophica scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: pleomorphomonadaceae genus: pleomorphomonas species: p. diazotrophica binomial name pleomorphomonas diazotrophicamadhaiyan et al. 2013 type strain dsm 25022, kacc 16233, r-5-392