azospirillum oryzae azospirillum oryzae azospirillum oryzae is a species of nitrogen-fixing bacteria associated with the roots of oryza sativa. its type strain is coc8t (=iam 15130t =cctcc ab204051t). azospirillum oryzae scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: rhodospirillales family: azospirillaceae genus: azospirillum species: azospirillum oryzaexie and yokota 2005