Metamorphosis is induced by food absence rather than a critical weight in the solitary bee, Osmia lignaria
Metamorphosis is induced by food absence rather than a critical weight in the solitary bee, Osmia lignaria
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DOI：
10.1073/pnas.1703008114
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发表时间：
2017-10-10
影响因子：
11.1
通讯作者：
Bowsher, Julia H.
中科院分区：
文献类型：
--
作者：
Helm, Bryan R.;Rinehart, Joseph P.;Bowsher, Julia H.
体型大小是一个重要的表型特征，与表现和健康相关。对于特定生长的昆虫，个体大小的变化是由生长速度和幼虫生长结束时停止生长的机制决定的。内分泌机制调节生长停止，它们在发育过程中的相对时间决定了身体大小和发育时间的表型变化。通常假设幼虫一旦达到临界体重就会开始变态。然而，即使对于研究得很好的昆虫物种，临界重量背后的机制也没有得到解决。更重要的是，临界权重可能是也可能不是跨物种的泛化。在这项研究中，我们描述了独居蜜蜂Osmia lignaria的大小调节的发育方面。我们证明饥饿提示了木本野生稻的变态，并且在该物种中不存在临界重量。幼虫开始化蛹
Body size is an important phenotypic trait that correlates with performance and fitness. For determinate growing insects, body size variation is determined by growth rate and the mechanisms that stop growth at the end of juvenile growth. Endocrine mechanisms regulate growth cessation, and their relative timing along development shapes phenotypic variation in body size and development time. Larval insects are generally hypothesized to initiate metamorphosis once they attain a critical weight. However, the mechanisms underlying the critical weight have not been resolved even for well-studied insect species. More importantly, critical weights may or may not be generalizable across species. In this study, we characterized the developmental aspects of size regulation in the solitary bee, Osmia lignaria. We demonstrate that starvation cues metamorphosis in O. lignaria and that a critical weight does not exist in this species. Larvae initiated pupation