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首页> 外文期刊>The Journal of Experimental Biology >An insect trap as habitat: cohesion-failure mechanism prevents adhesion of Pameridea roridulae bugs to the sticky surface of the plant Roridula gorgonias.
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An insect trap as habitat: cohesion-failure mechanism prevents adhesion of Pameridea roridulae bugs to the sticky surface of the plant Roridula gorgonias.

机译：一个昆虫诱捕器作为栖息地：内聚破坏机制阻止了Pameridea roridulae虫子粘附到植物Roridula gorgonias的粘性表面上。

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摘要

The glandular trichomes of the plant Roridula gorgonias release an extremely adhesive, visco-elastic, resinous secretion that traps a variety of insects, including those having a considerable body size. However, the specialized mutualistic mirid bug Pameridea roridulae lives and walks on this sticky plant surface without being trapped. We have sought to reveal the mechanism underlying the apparent non-sticky nature of the cuticle of this bug. In this study, we have visualized intact plant and insect surfaces using cryo-scanning electron microscopy and measured the adhesive properties of the plant secretion on different surfaces. We present a combination of structural and experimental results that suggest that a thick and cohesively weak film of an outermost, epicuticular greasy secretion acts as a ;sloughing-off' layer, preventing the formation of contacts between the sticky plant secretion and the solid insect cuticle. In a comparative study of fresh cuticle fractures of flies representing a typical prey of R. gorgonias, a thin, fragmentary layer of epicuticular grease was revealed. These results indicate that, when trapping prey, the plant adhesive might form proper contact with solid islands of the insect cuticle that are free of epicuticular grease.
机译：狼尾草（Roridula gorgonias）的腺毛有极强的粘附性，粘弹性，树脂状分泌物，能捕获多种昆虫，包括那些体型很大的昆虫。但是，专门的互助性金龟虫Pameridea roridulae可以在这种粘性植物表面上生活和行走而不会被困住。我们试图揭示该虫的表皮的表观非粘性性质的潜在机制。在这项研究中，我们已经使用冷冻扫描电子显微镜观察了完整的植物和昆虫表面，并测量了植物分泌物在不同表面上的粘附特性。我们提供了结构和实验结果的结合，表明最外层的表皮油腻分泌物的厚而凝聚力弱的膜起“脱落”层的作用，阻止了粘稠植物分泌物和固体昆虫表皮之间的接触。 。在一项比较研究的新鲜果蝇表皮骨折中，果蝇代表了典型的高粱红球菌，其表皮油脂薄而零碎。这些结果表明，当捕获猎物时，植物胶粘剂可能会与没有表皮油脂的昆虫表皮的固体岛形成适当的接触。

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