A functioning ovary is not required for sex peptide to reduce receptivity to mating in D-melanogaster
A functioning ovary is not required for sex peptide to reduce receptivity to mating in D-melanogaster
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DOI：
10.1016/j.jinsphys.2006.12.008
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发表时间：
2007-04-01
影响因子：
2.2
通讯作者：
Chapman, Tracey
中科院分区：
文献类型：
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作者：
Barnes, Andrew I.;Boone, James M.;Chapman, Tracey
在许多交配繁殖的无脊椎动物物种中，交配会导致性接受能力的暂时降低和产卵率的增加。这些过程通常看起来是协调调节的，并由精液成分的通过触发。然而，人们对这些过程之间的联系机制知之甚少。在雌性黑腹果蝇中，交配后的性接受度降低，产卵量增加，这是由雄性射精衍生性肽（SP）的作用引起的。SP对产蛋和接受性的影响尚未单独观察到，这表明接受性的降低至少部分取决于卵子发育或产卵的状态，子宫中卵子的存在是接受状态的一个强有力的预测因素。在这里，我们研究了卵子发育在早期卵黄形成前阶段被阻止的雌性对SP的反应。我们发现卵子发育受阻的雌性正常交配，对SP的正常接受性反应与早期卵子受阻无关。在产卵的可育对照雌性中，也观察到SP对接受性的显著影响，与子宫内是否存在卵子无关。结果表明，SP对受纳性的影响并不依赖于卵巢的功能，因此卵的发育或产卵不是SP受纳性反应的原因。(c) 2007 Elsevier Ltd.版权所有。
In many species of invertebrates that mate multiply, mating induces a temporary reduction in sexual receptivity and an increase in the rate of egg laying. These processes often appear to be co-ordinately regulated, and triggered by the passage of seminal fluid components. However, little is known about the mechanisms of the links between these processes. In Drosophila melanogaster females, post-mating sexual receptivity is decreased and egg laying increased by the actions of the male ejaculate-derived sex peptide (SP). Effects of SP on egg laying and receptivity have not been observed separately, which has led to the suggestion that the reduction in receptivity is at least partially dependent on the status of egg development or egg laying, with the presence of an egg in the uterus being a strong predictor of receptivity state. Here, we examine the response to SP of females in which egg development is arrested at an early, pre-vitellogenic stage. We find that females in which egg development is arrested mate normally and that normal receptivity responses to SP are independent of early egg arrest. Among fertile control females that laid eggs, a significant effect of SP on receptivity was also observed, independent of whether an egg was present in the uterus. The results show that the effects of SP on receptivity are not dependent upon a fully functional ovary, and hence that egg development or laying is not causal in the SP receptivity response. (c) 2007 Elsevier Ltd. All rights reserved.