中文摘要：

本文对1株小链霉菌StreptomycesparvusYnl68发酵滤液的抗植物病毒活性进行了研究。结果表明，该菌株的发酵滤液对烟草花叶病毒（TMV）、黄瓜花叶病毒（CMV）、马铃薯Y病毒（PVY）都有一定的预防和治疗效果。经枯斑试验测定，发酵滤液对TMV的钝化、预防和治疗效果分别为84．2％、68．7％和52．3％；酶标记免疫吸附测定法（ELISA）测定发现，发酵滤液对CMV和PVY的增殖抑制率分别为56．0％和46．4％；盆栽试验结果表明，发酵产物对TMV弓l起的青椒病毒病的预防和治疗效果分别为55。30％和41．49％。

英文摘要：

Fermentation filtrate of Streptomyces parvus Yn168 was found to be active against TMV （Tobacco mosaic virus） , CMV （Cucumber mosaic virus） and PVY （Potato virus Y） . Local lesion assays demonstrated that it inactivated, prevented and cured TMV infection by 84.2%, 68.7% and 52.3%, respectively. ELISA detection revealed that it inhibited replication of CMV and PVY by 56.0% and 46.4%, respectively. Its prevention and therapeutic efficiencies against TMV were 55.30% and 41.49%, respectively, when tested on pot-cultivated pepper 191ants.