Tram U, Wolfner M F
Section of Genetics and Development, Cornell University, Ithaca, NY 14853-2703, USA.
Proc Natl Acad Sci U S A. 1998 Mar 31;95(7):4051-4. doi: 10.1073/pnas.95.7.4051.
Finding a willing and suitable mate is critical for sexual reproduction. Visual, auditory, and chemical cues aid in locating and/or attracting partners. After mating, females from many insect species become less attractive. This is caused by changes in the quantity and/or quality of pheromones synthesized by the female and to changes in the female's behavior. For example, female insects may stop releasing pheromones, assume a mate refusal posture, or move less in response to males. Many postmating changes in female insects are triggered by seminal fluid proteins from the male's accessory gland proteins (Acps) and by sperm. To determine the role of seminal fluid components in mediating changes in attractiveness, we measured the attractiveness of Drosophila melanogaster females that had been mated to genetically altered males that lack sperm and/or Acps. We found that the drop in female attractiveness occurs in two phases. A short-term drop in attractiveness is triggered independent of the receipt of sperm and Acps. Maintenance of lowered attractiveness is dependent upon sperm.
找到一个愿意且合适的配偶对于有性生殖至关重要。视觉、听觉和化学信号有助于定位和/或吸引伴侣。许多昆虫物种的雌性在交配后会变得不那么有吸引力。这是由雌性合成的信息素的数量和/或质量变化以及雌性行为的变化引起的。例如，雌性昆虫可能会停止释放信息素，采取拒绝交配的姿势，或者对雄性的反应减少活动。雌性昆虫的许多交配后变化是由雄性附腺蛋白（Acps）中的精液蛋白和精子触发的。为了确定精液成分在介导吸引力变化中的作用，我们测量了与缺乏精子和/或Acps的基因改变雄性交配后的黑腹果蝇雌性的吸引力。我们发现雌性吸引力的下降分为两个阶段。吸引力的短期下降独立于精子和Acps的接收而触发。吸引力降低的维持依赖于精子。
