Induced Disease Resistance of Endophytic Bacteria REB01 to Bacterial Blight of Rice

摘要

Endophytic bacteria strain REB01 was isolated from the seeds of rice. The induced resistance of strain REB01 to rice sheath blight was studied by measuring the change of the activities of defense enzymes, peroxidase (POD) and polyphenol oxidase (PPO) and the contents of pathogenesis-related biochemicals, malondialdehyde (MDA) in rice leaves inoculation with REB01, Rhizoctonia solan (pathogen of rice sheath blight) and the control in pot tests. The treatments included inoculated sterile NB broth only (CK), inoculated REB01 only (REB01), inoculated sterile NB broth and R. solan (RK), inoculated REB01 and R. solan (REB01-RK). The results indicated the activity of POD and PPO and the Content of MDA in rice leaves was very significantly affected by endophytic bacteria strain REB01 inoculation. effectively affected activities of POD and PPO, also reduce the content of MDA. Systemic resistance in rice against to R. solan could be induced by the strain REB01.