Exogenous application of jasmonic acid induces volatile emissions in rice and enhances parasitism of Nilaparvata lugens eggs by theParasitoid Anagrus nilaparvatae
Exogenous application of jasmonic acid induces volatile emissions in rice and enhances parasitism of Nilaparvata lugens eggs by theParasitoid Anagrus nilaparvatae
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DOI：
10.1007/s10886-005-6072-9
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发表时间：
2005-09-01
影响因子：
2.3
通讯作者：
Shan, WF
中科院分区：
文献类型：
--
作者：
Lou, YG;Du, MH;Shan, WF
茉莉酸信号途径在植物对害虫和病原菌的诱导防御中起着重要作用，包括释放挥发物作为害虫天敌的引诱剂。研究了茉莉酸（JA）处理后水稻植株释放的挥发性物质对褐飞虱（Nilaparvata lugens，Stal）及其卵寄生蜂Anagrus nilaparvatum Pang et Wang寄主搜索行为的影响。雌成虫N.褐飞虱在释放后立即显著地偏好在JA处理的水稻植株上定居。寄生蜂A.与对照植株相比，稻瘟净对茉莉酸处理植株释放的挥发物有更强的吸引力。温室和田间试验表明，在不同的寄主上，寄生性不同。褐飞虱卵A.在被JA处理的植物包围的植物上的Nilaparvaccine比在对照植物上的高两倍以上。从水稻植株中收集的挥发物的分析表明，JA处理显着增加挥发物的释放，其中包括脂肪醛和醇，单萜，倍半萜，水杨酸甲酯，正十七烷，和一些尚未鉴定的化合物。这些结果证实了JA途径参与水稻的诱导防御，并证明卵寄生蜂A。稻瘟病菌利用植物提供的线索来定位寄主。我们解释了使用诱导植物挥发物的卵寄生虫的一个可靠的关联之间的稻飞虱取食损害和鸡蛋的存在。
Jasmonate signaling pathway plays an important role in induced plant defense against herbivores and pathogens, including the emission of volatiles that serve as attractants for natural enemies of herbivores. We studied the volatiles emitted from rice plants that were wounded and treated with jasmonic acid (JA) and their effects on the host-searching behavior of the rice brown planthopper, Nilaparvata lugens (Stal), and its mymarid egg parasitoid Anagrus nilaparvatae Pang et Wang. Female adults of N. lugens significantly preferred to settle on JA-treated rice plants immediately after release. The parasitoid A. nilaparvatae showed a similar preference and was more attracted to the volatiles emitted from JA-treated rice plants than to volatiles from control plants. This was also evident from greenhouse and field experiments in which parasitism of N. lugens eggs by A. nilaparvatae on plants that were surrounded by JA-treated plants was more than twofold higher than on control plants. Analyses of volatiles collected from rice plants showed that JA treatment dramatically increased the release of volatiles, which included aliphatic aldehydes and alcohols, monoterpenes, sesquiterpenes, methyl salicylate, n-heptadecane, and several as yet unidentified compounds. These results confirm an involvement of the JA pathway in induced defense in rice plants and demonstrate that the egg parasitoid A. nilaparvatae exploits plant-provided cues to locate hosts. We explain the use of induced plant volatiles by the egg parasitoid by a reliable association between planthopper feeding damage and egg presence.