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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Juvenile hormone, reproduction, and worker behavior in the neotropical social wasp Polistes canadensis
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Juvenile hormone, reproduction, and worker behavior in the neotropical social wasp Polistes canadensis

机译：新近社会黄蜂的幼体激素，生殖和工人行为

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摘要

Previous studies of the division of labor in colonies of eusocial Hymenoptera (wasps and bees) have led to two hypotheses regarding the evolution of juvenile hormone (JH) involvement. The novel- or single-function hypothesis proposes that the role of JH has changed from an exclusively reproductive function in primitively eusocial species (those lacking morphologically distinct queen and worker castes), to an exclusively behavioral function in highly eusocial societies (those containing morphologically distinct castes). In contrast, the split-function hypothesis proposes that JH originally functioned in the regulation of both reproduction and behavior in ancestral solitary species. Then, when reproductive and brood-care tasks came to be divided between queens and workers, the effects of JH were divided as well, with JH involved in regulation of reproductive maturation of egg-laying queens, and behavioral maturation, manifested as age-correlated changes in worker tasks, of workers. We report experiments designed to test these hypotheses. After documenting age-correlated changes in worker behavior (age polyethism) in the neotropical primitively eusocial wasp Polistes canadensis, we demonstrate that experimental application of the JH analog methoprene accelerates the onset of guarding behavior, an age-correlated task, and increases the number of foraging females; and we demonstrate that JH titers correlate with both ovarian development of queens and task differentiation in workers, as predicted by the split-function hypothesis. These findings support a view of social insect evolution that sees the contrasting worker and queen phenotypes as derived via decoupling of reproductive and brood-care components of the ancestral solitary reproductive physiology.
机译：以往关于正常社会膜翅目蜂（黄蜂和蜜蜂）群落分工的研究，导致了两个有关幼年激素（JH）参与进化的假说。新功能或单一功能假说提出，JH的角色已从原始的共社会物种（缺乏形态上不同的皇后和工人阶级）的专有生殖功能，转变为高度共社会的社会（包含形态上不同的人）的专有行为功能种姓）。相反，分裂函数假说提出，JH最初在祖先孤独物种的繁殖和行为调节中起作用。然后，在女王和工人之间划分生殖和育雏任务时，JH的作用也被划分了，JH参与调节产卵女王的生殖成熟和行为成熟，表现为年龄相关改变工人的工作任务。我们报告了旨在检验这些假设的实验。在记录了新热带原始正统黄蜂Polistes canadensis中工人行为（年龄多种族主义）与年龄相关的变化后，我们证明了JH类似物甲基异戊二烯的实验应用加速了护卫行为的发作，这是一个与年龄相关的任务，并增加了觅食的女性；并且我们证明了JH效价与女王的卵巢发育和工人的任务分化都相关，如分裂功能假说所预测的。这些发现支持了一种社会昆虫进化的观点，即工人和女王的表型形成对比，这是通过祖先单生生殖生理的生殖和育雏成分的分离产生的。

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