摘要
测定稻纵卷叶螟Cnaphalocrocis medinalis(Guen啨e)为害后水稻体内过氧化氢、水杨酸、茉莉酸3种信号分子以及防御相关化合物含量的变化.结果表明,稻纵卷叶螟为害后0.5、24 h能显著提高水稻体内过氧化氢浓度,为害后0.5、1、24 h显著增加水杨酸浓度,但不影响茉莉酸浓度.稻纵卷叶螟为害能导致水稻叶片中胰蛋白酶抑制剂和6种未知防御化合物含量上升,在叶鞘中只引起6种未知物中的3种含量上升,其他的3种未知物与胰蛋白酶抑制剂没有明显变化.外用水杨酸或过氧化氢处理水稻只在叶鞘中增加6种未知物中1种化合物的含量.说明稻纵卷叶螟为害诱导的防御化合物的变化部分是系统性的,而另一部分则是局部性的;并且稻纵卷叶螟为害诱导的防御反应是多种信号分子相互作用的结果.
The change.s in levels of hydrogen peroxide, salicylic acid and jasmonic acid, and defenserelated chemicals were investigated in rice plants infested by the rice leaf folder Cnaphalocrocis medinalis. The results show that C. medinalis infestation enhanced significantly the levels of hydrogen peroxide (0.5 and 24 h after infestation) and salicylic acid (0.5, 1 and 24 h after infestation) but not of jasmonic acid in plants. Compared to the control, C. rnedinalis infestation resulted in increases in concentrations of trypsin inhihitors and six unknown defense chemicals in infested leaves, but only three of the six unknown chemicals were enhanced in leaf sheaths of the infested plants. Exogenous application of hydrogen peroxide or salicylic acid only increased level of one of the six unknown chemicals in plants. This suggests that some defense chemicals in rice plants are systematically induced by C. medinalis infestation, whereas some are locally induced, and C. rnedinalis-induced rice defense response is a result of crosstalk among a number of signaling pathways.
出处
《浙江大学学报(农业与生命科学版)》
CAS
CSCD
北大核心
2008年第5期532-539,共8页
Journal of Zhejiang University:Agriculture and Life Sciences
基金
国家重点基础研究发展计划973"资助项目(2006CB102005)
国家自然科学基金资助项目(30370960)
教育部新世纪优秀人才支持计划资助项目(NCET-04-0534)
教育部创新团队资助项目(IRT0535)
浙江省科技厅重点资助项目(2006C22003)
关键词
稻纵卷叶螟
过氧化氢
水杨酸
信号转导途径
防御化合物
胰蛋白酶抑制剂
Cnaphalocrocis medinalis
hydrogen peroxide
salicylic acid
signaling pathway
defense chemical
trypsin inhibitor