Volatile organic compound emissions from Alnus glutinosa under interacting drought and herbivory stresses.
Volatile organic compound emissions from Alnus glutinosa under interacting drought and herbivory stresses.
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在相互作用的干旱和草食胁迫下，来自Alnus谷胱甘肽的挥发性有机化合物排放。
DOI：
10.1016/j.envexpbot.2013.12.011
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发表时间：
2014-04
影响因子：
5.7
通讯作者：
Niinemets Ü
中科院分区：
文献类型：
--
作者：
Copolovici L;Kännaste A;Remmel T;Niinemets Ü
植物对草食反应产生的挥发性有机化合物(VOCs)可以作为寄生和捕食昆虫的信号，但在非生物胁迫下对VOC诱导反应的修饰却鲜为人知。研究了在水分充足和干旱胁迫条件下，赤杨幼虫取食对落叶树叶片VOC排放的影响。干旱对光合作用速率和气孔导度有强烈的抑制作用，但昆虫取食对光合作用特性无明显影响。摄食导致脂肪氧合酶途径挥发性产物和单萜烯的释放，以及胁迫标志化合物(E)-β-罗勒烯和高萜烯DMNT的释放。在干旱胁迫下的植物中，排放被更强烈地激发，并在更早的时候达到最大值。此外，在以草食为食的干旱胁迫下的植物中，水杨酸甲酯的排放也被诱发。食草动物对浇水良好的植物更有吸引力，它们消耗的叶面积是干旱处理植物的四倍多。总体而言，这项研究证明了干旱的一个重要的启动效应，表明干旱/草食联合胁迫下的植物对草食动物更具抵抗力。
Plant volatile organic compounds (VOCs) elicited in response to herbivory can serve as cues for parasitic and predatory insects, but the modification of VOC elicitation responses under interacting abiotic stresses is poorly known. We studied foliage VOC emissions in the deciduous tree Alnus glutinosa induced by feeding by the larvae of green alder sawfly (Monsoma pulveratum) under well-watered and drought-stressed conditions. Drought strongly curbed photosynthesis rate and stomatal conductance, but there were no effects of insect feeding on photosynthetic characteristics. Feeding induced emissions of volatile products of lipoxygenase pathway and monoterpenes, and emissions of stress marker compounds (E)-β-ocimene and homoterpene DMNT. The emissions were more strongly elicited and reached a maximum value earlier in drought-stressed plants. In addition, methyl salicylate emissions were elicited in herbivory-fed drought-stressed plants. Herbivores were more strongly attracted to well-watered plants and consumed more than a four-fold greater fraction of leaf area than they consumed from drought-treated plants. Overall, this study demonstrates an important priming effect of drought, suggesting that plants under combined drought/herbivory stress are more resistant to herbivores.
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影响因子：
7.3
作者：
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通讯作者：
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影响因子：
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