摘要
已报道病原物侵染后,影响寄主体内的次生代谢,包括一些酶的活性变化,并提出这些酶活性的增高可能与抗病性有关,但亦有相反意见。本文比较了抗病和感病的黄瓜品种在感染白粉病菌后的几种酶活性变化。
Polyphenoloxidase peroxidase and phenylalanine ammonia lyase from cucumber cucumis sativus L.leaves were studied during the period of 22 days after inoculation with cucumber powder mildew. These results suggest that early rapid increase of polyphenoloxidase,peroxidase and phe- nylalanine ammonia lyase activities is of great significance in the disease resistance.Thus it may provide as one of the physiological indexes for the selection of cucumber resistant culti- var.The mechnism of disease resistance may be shown by toxic role of phenol oxidates and cell wall lignification.
关键词
黄瓜
黄瓜白粉病
酶活性
Cucumber
cucumber powder mildew
polyphenoloxidase
peroxidase
phenylalanine ammonia lyase
