Journal
ECOLOGY LETTERS
Volume 23, Issue 7, Pages 1097-1106Publisher
WILEY
DOI: 10.1111/ele.13509
Keywords
Brassica; cues; defence; fitness; herbivore performance; herbivore-induced plant volatiles; oviposition-induced plant volatiles; Pieris brassicae; priming
Categories
Funding
- Swiss National Science Foundation [31003A-163145]
- ETH Zurich
- Dutch Research Council [14854]
- Swiss National Science Foundation (SNF) [31003A_163145] Funding Source: Swiss National Science Foundation (SNF)
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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.
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