中文摘要：

瓜枝孢（Cladosporium cucumernium）弱致病菌株2-2A2诱导黄瓜产生对黄瓜黑星病的抗病性反应。对经2-2A2诱导后黄瓜叶片中提取的物质进行生物活性试验、硅胶板薄层层析、高效液相色谱分析，证明2-2A2可以有效诱导黄瓜中类黄酮类植保素的积累。

英文摘要：

Effect of resistance of cucumber against Cladosporium cucumernium was induced by pathogenicity-impaired strains （PIS） 2-2A2. The toxicity of extracted compounds to C. was carried out successively by bioassay, thin-layer chromatograms （TLC） and high performance liquid chromatography （HPLC）. The results showed that the effective ingredients were flavonoid phytoalexins and they could be induced by PIS 2-2A2 in cucumber leaves.