黄瓜组织中氨基酸,糖和叶绿素含量与其对霜霉病抗性的关系

对黄瓜霜霉病抗性不同的黄瓜品种氨基酸含量进行测定，结果表明，在萌动种子内，除谷氨酸，赖氨酸和ＮＨ３外，其它氨基酸的平均含量抗病品种高于感病品种；在子叶内，除胱氨酸，苯丙氨酸和ＮＨ３外，其它氨基酸含量感病品种高于抗病品种；不同叶位真叶的氨基酸含量随着叶位上升（叶龄的减小）而增加，同一叶位的各种氨基酸含量抗病品种高于感病品种，各叶痊氨基酸的平均含量抗病品种也高于感病品种，其中胱氨酸，苯丙氨酸和ＮＨ３的

Correlation Between the Contents of Amino acid Suggar and Chlorophyll in Cucumber Tissue and Their Resistance to Downy Mildew of Cucumber

The contents of amino acid, sugar and chlorophyll in different cucumber varieties with different resistance to downy mildew of cucumber were tested. As a result, the contents and the kinds of amino acid in germinated seed, cotyledon and true leaves on different nodes of cucumber plant were quite different. The results showed that there were significant positive correlations between the contents of cystine, phenylalanine, NH3and the resistance to downy mildew of cucumber, and between the contents of soluble to talsugar in cotyledon and true leaves on different nodes of a same cucumber plant and the resistance to the disease. There were a significant negative correlation between the contents of reducing sugar, the reducing sugar to total sugar ratio, chl.a and the resistance to the disease. But there was ignificant correlation between the total amounts of chlorophyll as well as chl.b and the resistance to the disease.