Adaptive colour change and background choice behaviour in peppered moth caterpillars is mediated by extraocular photoreception
Adaptive colour change and background choice behaviour in peppered moth caterpillars is mediated by extraocular photoreception
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DOI：
10.1038/s42003-019-0502-7
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发表时间：
2019-08-02
影响因子：
5.9
通讯作者：
Saccheri, Ilik J.
中科院分区：
文献类型：
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作者：
Eacock, Amy;Rowland, Hannah M.;Saccheri, Ilik J.
不同于眼睛的组织对光的感知发生在不同的动物群体中，从而实现昼夜节律控制和趋光行为。眼外感光器也可能促进头足类动物和蜥蜴的快速颜色变化，但对于介导节肢动物缓慢颜色变化的感觉系统知之甚少。我们之前报道过，胡椒蛾（Biston betularia）模仿树枝的毛毛虫缓慢的颜色变化是对无彩色和彩色视觉线索的反应。在这里，我们表明对这些线索的感知以及由此产生的表型反应不需要视觉。单眼完全被遮盖的毛毛虫仍然能够通过改变颜色和选择栖息在颜色匹配的树枝上来增强其隐秘性。幼虫体皮上表达的一套视觉基因可能在该机制中发挥着关键作用。据我们所知，这是第一个证据表明眼外颜色传感可以介导节肢动物基于色素的颜色变化和行为。
Light sensing by tissues distinct from the eye occurs in diverse animal groups, enabling circadian control and phototactic behaviour. Extraocular photoreceptors may also facilitate rapid colour change in cephalopods and lizards, but little is known about the sensory system that mediates slow colour change in arthropods. We previously reported that slow colour change in twig-mimicking caterpillars of the peppered moth (Biston betularia) is a response to achromatic and chromatic visual cues. Here we show that the perception of these cues, and the resulting phenotypic responses, does not require ocular vision. Caterpillars with completely obscured ocelli remained capable of enhancing their crypsis by changing colour and choosing to rest on colour-matching twigs. A suite of visual genes, expressed across the larval integument, likely plays a key role in the mechanism. To our knowledge, this is the first evidence that extraocular colour sensing can mediate pigment-based colour change and behaviour in an arthropod.