黄瓜叶片中木质素含量与抗霜霉病的关系

Relationship Between Lighin Content in Cucumber Leaves and Resistance to Paeud operonospora cubensis

本研究采用已筛选出的诱导菌，进行茎部注射接种，活化植株的抗性潜能，增强抵抗黄瓜霜霉菌（Ｐｓｅｕｄｏｐｅｒｏｎｏｓｐｏｒａｃｕｂｅｎｓｉｓｆ．ｓｐ．ｃｕｃｕｍｅｒｉｎｕｍ）浸染的能力。进一步测定和分析木质素含量与诱导作用之间的关系。研究数据表明：凡经诱导处理的植株，叶片木质素含量均显著高于未诱导叶片中木质素含量。诱导叶片木质素含量分别为７．５％和８．４％，而对照株（未诱导）叶片木质素含量为７％。诱导抗性效应与木质素的形成有密切相关。试验结果说明，木质素合成量的提高，是植株抗性潜能被激活的结果，是诱导抗性机制的一部分。

The experiment utilized two induced─pathogens to inject in the stem of cucumber plant. The results showed that the active resistance and against to downy mitdew were improved, all the foliages lignin content of the injected plants were higher than the contrast plants, they were 7. 5%, 8. 4% and 7. 0%, respectly.