Convergence in Symbiont-Induced Plant-Mediated Responses to Herbivory: Cascading Effects for Foraging Parasitoids

IF 7.9 1区 环境科学与生态学 Q1 ECOLOGY
Ecology Letters Pub Date : 2025-08-01 DOI:10.1111/ele.70183
Antonino Cusumano, Serge Urbach, Veronique Jouan, Heiko Vogel, Marcel Dicke, Anne-Nathalie Volkoff, Erik H. Poelman
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引用次数: 0

Abstract

Convergent evolution arises when unrelated species develop similar traits without a shared ancestral origin possessing those characteristics. While typically observed at the organismal level, it can also occur at higher levels of biological organisation. Polydnaviruses represent a striking example of convergent evolution. These viruses, divided into bracoviruses and ichnoviruses, were independently acquired by braconid and ichneumonid parasitoid wasps respectively, to deliver pathogenic genes to caterpillar hosts. Here we show convergent patterns across trophic levels, demonstrating that both bracoviruses and ichnoviruses induce changes in plant-phenotypic traits that specifically benefit their parasitoid partners, facilitating plant-mediated host discrimination. This is achieved through an interaction network triggered by changes in the polydnavirus-infected herbivore (via alteration in regurgitant composition) which eventually affected parasitoids' foraging decisions. Our findings unveil a novel ecological benefit that polydnaviruses offer to their parasitoid partners through intricate, plant-mediated effects, providing evidence of convergence in symbiont-induced responses in terrestrial trophic systems.

Abstract Image

共生诱导植物对草食反应的趋同:寄生蜂觅食的级联效应
趋同进化是指不相关的物种在没有共同祖先的情况下发展出相似的特征。虽然通常在有机体水平上观察到,但它也可能发生在更高水平的生物组织中。多dna病毒是趋同进化的一个显著例子。这些病毒分为苞片病毒和卵状虫病毒,分别由苞片虫和卵状虫寄生蜂独立获得,将致病基因传递给毛虫宿主。在这里,我们展示了在营养水平上的趋同模式,证明了bracovirus和ichnovirus都诱导植物表型性状的变化,这些变化特别有利于它们的寄生伴侣,促进了植物介导的宿主歧视。这是通过受多病毒感染的草食动物的变化(通过反刍成分的改变)引发的相互作用网络实现的,最终影响了拟寄生物的觅食决定。我们的发现揭示了多核酸病毒通过复杂的植物介导效应为其寄生伙伴提供的一种新的生态效益,为陆地营养系统中共生体诱导的反应趋同提供了证据。
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来源期刊
Ecology Letters
Ecology Letters 环境科学-生态学
CiteScore
17.60
自引率
3.40%
发文量
201
审稿时长
1.8 months
期刊介绍: Ecology Letters serves as a platform for the rapid publication of innovative research in ecology. It considers manuscripts across all taxa, biomes, and geographic regions, prioritizing papers that investigate clearly stated hypotheses. The journal publishes concise papers of high originality and general interest, contributing to new developments in ecology. Purely descriptive papers and those that only confirm or extend previous results are discouraged.
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