Inhibitory Activity Of Secondary Metabolites Isolated From Endophytic Bacteria Associated With The Cultivation Of Yam (Dioscorea Spp.) Against Phytopathogens Of Rice Plants (Oryza Sativa L.)

Abstract

In search of new effective biological substances of microbial origin for the management of diseases produced by phytopathogens in rice crops, biological control with endophytic bacteria has become a friendly alternative to chemical products, and to answer the question "Do endophytic bacteria have inhibitory activity against Burkholderia glumae, the cause of bacterial blast of panicles in commercial rice varieties? this study was conducted to isolate endophytic bacteria associated to different tissues of yam plants resistant to anthracnose in the department of Sucre and to evaluate in vitro the antibacterial activity against B. glumae. In this study, endophytic bacteria were isolated from different tissues of yam plants (Dioscorea rotundata) and their capacity for inhibition against B. glumae causing rice panicle blast was evaluated in vitro, using vegetative cells and secondary metabolite-type extract from filtered crude culture. The results of this activity show Burkholderia cepacia as an endophytic bacterium with 75.3% antibacterial activity against B. glumae, the cause of rice panicle blast.