Plant volatiles induced by herbivore eggs prime defences and mediate shifts in the reproductive strategy of receiving plants
Plant volatiles induced by herbivore eggs prime defences and mediate shifts in the reproductive strategy of receiving plants
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DOI：
10.1111/ele.13509
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发表时间：
2020-04-21
期刊：
影响因子：
8.8
通讯作者：
Mescher, Mark C.
中科院分区：
文献类型：
--
作者：
Pashalidou, Foteini G.;Eyman, Lisa;Mescher, Mark C.
植物可以检测到与未来食草性疾病风险相关的线索，并相应地修改防御表型；然而，我们目前对植物做出反应的早期预警线索的范围和反应的性质的了解都是有限的。在这里，我们报告了暴露于被草食虫卵感染的植物组织中的挥发性排放物，促进了两个十字花科植物对随后的草食的更强的防御反应。此外，与未暴露的对照相比，暴露在这些不稳定的线索下引起了黑芥菜从生长到繁殖的明显转变，暴露的植株表现出更多的花和种子产量，但叶片产量减少。因此，我们的结果证明了植物防御对一种新的环境线索--产卵诱导的植物挥发物的反应，同时也表明植物对早期预警线索的反应可能包括防御和生活史特征的变化。
Plants can detect cues associated with the risk of future herbivory and modify defence phenotypes accordingly; however, our current understanding is limited both with respect to the range of early warning cues to which plants respond and the nature of the responses. Here we report that exposure to volatile emissions from plant tissues infested with herbivore eggs promotes stronger defence responses to subsequent herbivory in two Brassica species. Furthermore, exposure to these volatile cues elicited an apparent shift from growth to reproduction in Brassica nigra, with exposed plants exhibiting increased flower and seed production, but reduced leaf production, relative to unexposed controls. Our results thus document plant defence priming in response to a novel environmental cue, oviposition-induced plant volatiles, while also showing that plant responses to early warning cues can include changes in both defence and life-history traits.