Female nutritional status determines the magnitude and sign of responses to a male ejaculate signal in Drosophila melanogaster
Female nutritional status determines the magnitude and sign of responses to a male ejaculate signal in Drosophila melanogaster
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DOI：
10.1111/j.1420-9101.2009.01882.x
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发表时间：
2010-01-01
影响因子：
2.1
通讯作者：
Chapman, T.
中科院分区：
文献类型：
--
作者：
Fricke, C.;Bretman, A.;Chapman, T.
在交配过程中，射精化学物质从雄性转移到雌性，导致雌性行为和生理发生显着变化，但这些反应表型变异的原因却知之甚少。我们在这里测试了成年雌性营养对雌性黑腹果蝇对特定射精成分——性肽（SP）的反应的影响，这种成分之所以令人感兴趣，是因为它对雌性产卵、性接受、摄食率、免疫反应以及调解性冲突的潜在作用有影响。我们让成年雌性接受五种不同的饮食，并将它们与转移或不转移 SP 的雄性持续饲养。饮食改变了 SP 对不同表型性状（产蛋性、接受性和寿命）的影响的存在、程度和迹象，并且不同的性状以不同的方式做出反应。这表明对交配的反应可以是解耦的，并且可以在不同的环境中独立变化。重要的是，饮食还显着影响暴露于传播 SP 的雄性对雌性是否有益或付出代价，并且有益效果的发生频率比预期要高。因此，食物环境也可以显着影响交配反应选择的强度和方向。
Ejaculate chemicals transferred from males to females during mating cause significant changes in female behaviour and physiology, but the causes of phenotypic variation in these responses is little understood. We tested here the effect of adult female nutrition on the response of female Drosophila melanogaster to a specific ejaculate component, the sex peptide (SP), which is of interest because of its effects on female egg laying, sexual receptivity, feeding rate, immune responses and potential role in mediating sexual conflict. We exposed adult females to five different diets and kept them continuously with males that did or did not transfer SP. Diet altered the presence, magnitude and sign of the effects of SP on different phenotypic traits (egg laying, receptivity and lifespan) and different traits responded in different ways. This showed that the set of responses to mating can be uncoupled and can vary independently in different environments. Importantly, diet also significantly affected whether exposure to SP transferring males was beneficial or costly to females, with beneficial effects occurring more often than expected. Hence, the food environment can also shape significantly the strength and direction of selection on mating responses.