链霉菌702所产抗真菌物质对水稻纹枯病菌的抑菌机制研究

A Study on the Inhibition Mechanism of Antifungi Substance Produced by Streptomyces 702 on Rhizoctonia solania in Rice

研究了链霉菌702所产抗真菌活性物质对水稻纹枯病菌的抑菌机制,结果表明:702对纹枯病菌菌丝生长有强烈的抑制作用,EC50为1.12805mg/L;能显著的引起菌丝细胞内原生质凝集;对菌核及孢子的萌发有较强的抑制作用,15.11mg/L和10.64mg/L完全抑制菌核和孢子的萌发;对孢子形成也有一定的阻碍作用,22.66mg/L完全抑制孢子形成。

The inhibition mechanism of antifungi substance produced by Streptomyces 702 on Rhizoctonia solania in rice was studied. Streptomyces 702 can strongly inhibit royceliuro growth and EC50 is 1. 12805 mg/ L. Streptomyces 702 can obviously result in condensing of the plasma in the mycelium cell and strongly inhibit sclerotium and spore germination,a complete inhibition takes place when the dosage is at the level of 15.11mg/L and 10.64 mg/L. It has a notable inhibition effect on spore formation, a complete inhibition takes place when the dosage is at the level of 22.66 mg/L.