The rsmA-like gene rsmA(Xoo) of Xanthomonas oryzae pv. oryzae regulates bacterial virulence and production of diffusible signal factor.

ABSTRACT: The plant-pathogenic prokaryote Xanthomonas oryzae pv. oryzae (Xoo) causes bacterial leaf blight, one of the most destructive diseases of rice. A nonpolar mutant of the rsmA-like gene rsmA(Xoo) of the Xoo Chinese strain 13751 was constructed by homologous integration with a suicide plasmid. Virulence tests on a host plant, namely the hybrid rice cultivar Teyou 63, showed that the mutant had lost its virulence almost completely, whereas tests on a nonhost, namely castor-oil plant (Ricinus communis), showed that the mutant had also lost the ability to induce a hypersensitive response in the nonhost. In addition, the rsmA(Xoo) mutant produced significantly smaller amounts of the diffusible signal factor, extracellular endoglucanase, amylase and extracellular polysaccharide, but showed signifi

SUBMITTER: Zhu PL 

PROVIDER: S-EPMC6640276 | biostudies-literature | 2011 Apr

REPOSITORIES: biostudies-literature