Antagonistic activities of endophytic bacteria isolated from rice roots against the fungus Magnaporthe oryzae, a causal of rice blast disease

Abstract Background The blast disease of rice caused by the fungus Magnaphorthe oryzae is one most destructive diseases in Nam Dinh province, Vietnam. This study aimed to isolate and screen antagonistic bacteria isolated from ( Oryza sativa ) against M. . Results In present study, 14 endophytic were roots a Ngoc Xuan variety province. result showed that 6 isolates vitro activity Of 6, 2 strains, ND06 ND10, molecularly identified as Bacillus velezensis Pseudomonas putida , produced significant inhibition on pathogenic growth with 62.87% 64.25%, respectively, while other 4 (ND03, ND07, ND09, ND11) weak inhibition. addition, ND10 strains also presented under greenhouse conditions. Moreover, screening plant growth-promoting (PGP) traits exhibited all 5 PGP including IAA production, phosphate solubilization, production ammonia, 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase, siderophore. experimental results indicated cultivar seedlings inoculated or strain enhancement agronomic parameters (root length, shoot dry matter, chlorophyll content). Conclusions root (ND06 ND10) possessed contemporarily multiple antifungal activity. These should be further characterized order confirm beneficial develop potential biofertilizer and/or biocontrol agent for sustainable production.