黄瓜根部施用化学物质对其霜霉病诱导抗性的研究

A study on the induced endurance of cucumber to downy mildew by root inducing with chemical materials

摘要: 分别用几种化学物质从黄瓜幼苗子叶期开始进行根部诱导，结果表明，在自然病原激发病害试验和在人工接种病原激发病害试验中，经苯酚、脲素、无水对氨基苯磺酸和氯化钾诱导的黄瓜植株病株率和病叶率下降显著。对可产生诱导免疫效果的化学物质分析发现，氨类和苯类物质及钾的氯化物与黄瓜叶片对霜霉病的抗性有极为密切的关系。

Abstract: Experiments on the induced endurance of cucumber were carried out by application of several chemical materials separately to the root from the beginning of cotyledon stage.The results showed that regardless of the natural or artifical induced diseases,the decrease of the diseased plant rate was significant after induced at the root with several chemical materials.The results from analysing the chemicals that could possibly induce immunity indicated that ammonias,benzenes and potassium chloride were closely related to the induced resistances of cucumber leaves to downy mildew.