斜纹夜蛾
寄生蜂
食草动物
生物
吸引力
捕食
吸引力
生殖器鳞翅目
植物
膜翅目
夜蛾科
生态学
精神分析
心理学
语言学
哲学
作者
Meng Ye,Nathalie Veyrat,Hao Xu,Lingfei Hu,Ted C. J. Turlings,Matthias Erb
出处
期刊:Science Advances
[American Association for the Advancement of Science (AAAS)]
日期:2018-05-04
卷期号:4 (5)
被引量:67
标识
DOI:10.1126/sciadv.aar4767
摘要
Herbivore-induced plant volatiles (HIPVs) can mediate tritrophic interactions by attracting natural enemies of insect herbivores such as predators and parasitoids. Whether HIPVs can also mediate tritrophic interactions by influencing the attractiveness of the herbivores themselves remains unknown. We explored this question by studying the role of indole, a common HIPV in the plant kingdom. We found that herbivory-induced indole increases the recruitment of the solitary endoparasitoid Microplitis rufiventris to maize plants that are induced by Spodoptera littoralis caterpillars. Surprisingly, however, indole reduces parasitoid recruitment when the caterpillars themselves are present on the plants. Further experiments revealed that indole exposure renders S. littoralis caterpillars unattractive to M. rufiventris, leading to an overall reduction in attractiveness of plant-herbivore complexes. Furthermore, indole increases S. littoralis resistance and decreases M. rufiventris parasitization success. S. littoralis caterpillars are repelled by indole in the absence of M. rufiventris but specifically stop avoiding the volatile in the presence of the parasitoid. Our study shows how an HIPV can undermine tritrophic interactions by reducing the suitability and attractiveness of caterpillars to parasitoids.
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