不同抗性的黄瓜幼苗对接种霜霉病菌的生理响应  

Physilogical Response of Cucumber Seedlings After Pseudoperonospora cubensis Inoculation

作　　者：李丽霞[1] 付镇芳[1] 贺会强[1] 李玉红[1] 

机构地区：[1]西北农林科技大学园艺学院,陕西杨凌712100

出　　处：《北方园艺》2012年第5期25-27,共3页Northern Horticulture

基　　金：国家自然科学基金资助项目(31071791);西北农林科技大学基本科研业务费专项资金资助项目(QN2009011)

摘　　要：以黄瓜抗病品种"津春4号"和感病品种"长春密刺"为试材,在接种黄瓜霜霉病菌后0.5、1、2、4、7d对叶片的丙二醛(MDA)、可溶性糖、可溶性蛋白含量和乙烯释放量进行了检测,并分析了这些生理变化与黄瓜霜霉病抗性之间的关系。结果表明:抗病品种黄瓜叶片中MDA含量、乙烯释放量低于感病品种,而可溶性糖、可溶性蛋白含量则高于感病品种。表明抗病品种比感病品种具有更强的防御能力和抗膜脂过氧化能力。Taking cucumber resistant variety ＇Jinchusihao＇ and susceptible variety ＇ Changchunmici＇ as test material, the changes of malondialdehyde（MDA）, soluble sugar, soluble protein and ethylene content on cucumber seedlings after inoculated with Pseudoperonospora cubensis 0. 5, 1, 2, 4,7 d were analyzed, and relations between these physiogical changes and resistance against downy mildew were also studied. The results showed that the contents of MDA and ethylene in resistant variety were lower,while the contents of soluble sugar and soluble protein were higher than that of susceptible variety. It demonstrated that resistant variety possessed stronger protective ability and was more resistant to membrane lipid peroxidation.

关 键 词：黄瓜 霜霉病 丙二醛 可溶性糖 可溶性蛋白 乙烯 

分 类 号：S642.204.3[农业科学—蔬菜学]