Xanthomonas oryzae is a species of proteobacteria. The major host of the bacteria is rice.
The species contains two pathovars which are non-European: Xanthomonas oryzae pv. oryzae and Xanthomonas oryzae pv. oryzicola.
Host resistance gene, Xa21,from Oryza longistaminata is integrated into the genome of Oryza sativa for the broad range resistance of rice blight disease caused by Xanthomonas oryzae pv. oryzae 
- ^ a b Xanthomonas oryzae
- ^ Rice Genetics Newsletter, Vol. 20: Evaluation of durable resistance of transgenic hybrid maintainer line IR58025B for bacterial blight disease of rice