期刊
ECOLOGY LETTERS
卷 18, 期 2, 页码 135-143出版社
WILEY-BLACKWELL
DOI: 10.1111/ele.12386
关键词
Floral evolution; learning; phenylacetaldehyde; pollination; volatile organic compounds (VOC); volatile
类别
资金
- European Union [281093]
- European Research Council (ERC) [281093] Funding Source: European Research Council (ERC)
Pollinators visit flowers for rewards and should therefore have a preference for floral signals that indicate reward status, so called honest signals'. We investigated honest signalling in Brassica rapa L. and its relevance for the attraction of a generalised pollinator, the bumble bee Bombus terrestris (L.). We found a positive association between reward amount (nectar sugar and pollen) and the floral scent compound phenylacetaldehyde. Bumble bees developed a preference for phenylacetaldehyde over other scent compounds after foraging on B. rapa. When foraging on artificial flowers scented with synthetic volatiles, bumble bees developed a preference for those specific compounds that honestly indicated reward status. These results show that the honesty of floral signals can play a key role in their attractiveness to pollinators. In plants, a genetic constraint, resource limitation in reward and signal production, and sanctions against cheaters may contribute to the evolution and maintenance of honest signalling.
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