陈年来;朱振家;代春艳;王春林;安翠香;

• 1:甘肃农业大学农学院
• 2:甘肃农业大学资源与环境学院

摘要(Abstract)：

诱导植物内在抗性是病害控制的新策略,诱导效应可能与不同品种组成性表达的基础抗性有关。以3个抗性水平不同的品种为材料,研究了苯并噻二唑(BTH)对甜瓜白粉病抗性的诱导效应,以期进一步阐释抗性诱导效应与品种基础抗性的关系。结果显示,BTH诱导甜瓜抗白粉病的效果与品种的基础抗性正相关,对抗病品种的诱导效果高于中抗和感病品种,抗病品种叶片中β-1,3-葡聚糖酶(GLU)和苯丙氨酸解氨酶(PAL)活性增长幅度也较中抗和感病品种大。BTH处理3 d后接种白粉菌,不同抗性水平甜瓜品种叶片中GLU、PAL和多酚氧化酶(PPO)活性均较只接种处理明显上升。叶片超微结构观察显示:乳突结构是寄主对病原菌侵染的一种主动反应,甜瓜抗病品种叶片中乳突结构多呈半圆球型,中抗和感病品种叶片中多呈圆筒型。

关键词(KeyWords)： 甜瓜;BTH;白粉病;抗性酶活性;超微结构

Abstract:

Keywords:

基金项目(Foundation): 甘肃省农业生物技术研究与开发应用(编号:GNSW-2006-08)

作者(Author): 陈年来;朱振家;代春艳;王春林;安翠香;

Email:

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