Herbivory-mediated pollinator limitation: negative impacts of induced volatiles on plant-pollinator interactions
Herbivory-mediated pollinator limitation: negative impacts of induced volatiles on plant-pollinator interactions
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DOI：
10.1890/10-1945.1
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发表时间：
2011-09-01
期刊：
影响因子：
4.8
通讯作者：
Poveda, Katja
中科院分区：
文献类型：
--
作者：
Kessler, Andre;Halitschke, Rayko;Poveda, Katja
虽然诱导植物对植食性的反应作为抗性机制已经得到了很好的研究，但诱导如何塑造群落相互作用并最终塑造植物适合度仍然相对未知。使用野生番茄，Solanum peruvianum，原产于秘鲁安第斯山脉，我们评估了授粉中断作为诱导反应的潜在生态成本。更具体地说，我们测试的假设，在草食动物攻击的植物，如草食动物引起的挥发性有机化合物（VOCs）的排放，改变传粉者的行为，从而影响植物的健身代谢变化。我们进行了一系列的操作现场实验，以评估草食动物引起的植物和花卉VOC排放的作用，草食动物影响传粉行为的机制。在野外调查和生物测定中，我们发现，真实的和模拟的植食性（茉莉酸甲酯的应用）降低了S。peruvianum花给它们的本地传粉者。我们表明，减少传粉者的偏好，而不是资源限制，由于叶组织的去除，导致减少种子集。单性蜜蜂传粉者使用花植物挥发物，响应草食动物或茉莉酸甲酯处理，作为线索，以避免受损植物的花序。这种植食诱导的传粉者限制可以被看作是诱导植物响应的一般成本以及植食诱导挥发物排放的特定成本。
Although induced plant responses to herbivory are well studied as mechanisms of resistance, how induction shapes community interactions and ultimately plant fitness is still relatively unknown. Using a wild tomato, Solanum peruvianum, native to the Peruvian Andes, we evaluated the disruption of pollination as a potential ecological cost of induced responses. More specifically, we tested the hypothesis that metabolic changes in herbivore-attacked plants, such as the herbivore-induced emission of volatile organic compounds (VOCs), alter pollinator behavior and consequentially affect plant fitness. We conducted a series of manipulative field experiments to evaluate the role of herbivore-induced vegetative and floral VOC emissions as mechanisms by which herbivory affects pollinator behavior. In field surveys and bioassays in the plants' native habitat, we found that real and simulated herbivory (methyl jasmonate application) reduced attractiveness of S. peruvianum flowers to their native pollinators. We show that reduced pollinator preference, not resource limitation due to leaf tissue removal, resulted in reduced seed set. Solitary bee pollinators use floral plant volatiles, emitted in response to herbivory or methyl jasmonate treatment, as cues to avoid inflorescences on damaged plants. This herbivory-induced pollinator limitation can be viewed as a general cost of induced plant responses as well as a specific cost of herbivory-induced volatile emission.