绿色木霉LTR12-1对黄瓜枯萎病菌防治作用机制的初步研究

Studies on Antagonism of Trichoderma viride against Fusarium oxysporum f.sp.cucumerinum

绿色木霉LTR12-1对黄瓜枯萎病菌有很强的拮抗作用,主要作用方式为位点竞争、营养竞争和抗生作用。LTR12-1的主要抗生机制是,产生几丁质酶、β-1,3-葡聚糖酶和蛋白质酶消解病原菌细胞壁,从而杀灭病原菌。

Antagonism modes of Trichoderma viride(strain LTR12-1)against Fusarium oxysporum f.sp.cucumerinum,which was the pathogen of Fusarium wilt of cucumber,were studied by com petition,antibiosis and the enzymes activities of chitinase,β-1,3-glucanase and pro teinase.The results showed that the presumptive antagonism modes of LTR12-1were an tibio sis and competition for space and nutrition against the pathogen.The antibiosis might be partially due to hydrolysis of cell wall of the pathogen by chitinase,β-1,3-glu canase and pro teinase of LTR12-1.