【摘要】 用PDA培养基平板法测定了0.4%OS-诱抗剂水剂对水稻纹枯病菌、小麦纹枯病菌、油菜菌核病菌、辣椒立枯病菌、瓜类绵腐病菌、黄瓜枯萎病菌的生物活性,其EC50值分别为34.56、59.33、33.17、85.92、91.91、122.87μg/mL,OS-诱抗剂对水稻纹枯病、油菜菌核病较好。高效液相色谱分析表明,经OS-诱抗剂处理后的植物提取液中酚类物质的种类和含量相对于对照有明显的变化,说明OS-诱抗剂对植物的防病作用可能是促使植物体内产生了酚类抗病物质。更多还原

【Abstract】 The antagonistic experiments on PDA showed that OS-elicitor(0.4% Water) caused various phytotoxicity to different fungi such as Rhizoctonia solani Kühn, R.cerealis Vander Hoeven, Sclerotinia sclerotiorum (Lib.) De Bary, Pythium aphanidermatum (Eds.)Fitzp.and Fusarium oxysporum f.sp cucumerinum. The extracts of cucumber leaves treated with OS-elicitor showed inhibitory effects on the growth of F. oxysporum f.sp cucumerinum spore.A HPLC analysis demonstrated that the phenolic contents in the extract of cucumber leaves treated with OS-elicitor were different from that in the extract of untreated leaves.更多还原