Function of epidermal surfaces in the trapping efficiency of Nepenthes alata pitchers
Function of epidermal surfaces in the trapping efficiency of Nepenthes alata pitchers
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DOI：
10.1046/j.1469-8137.2002.00530.x
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发表时间：
2002-12-01
期刊：
影响因子：
9.4
通讯作者：
Rowe, N
中科院分区：
文献类型：
--
作者：
Gaume, L;Gorb, S;Rowe, N
几种表皮微结构表征猪笼草的表面，并推测参与其诱捕功能。本文报道了阿拉塔猪笼草（Nepenthes alata）表面对昆虫运动和诱捕效率的影响。两种昆虫物种-果蝇（果蝇）和蚂蚁（Iridomyrmex humilis）-被测试的能力，以保持和行走在他们身上。定量分析了不同表皮结构对诱捕能力的相对贡献，结果表明，捕虫笼对这两种昆虫都是非常有效的诱捕器。它们捕捉蚂蚁的效率略高，但保留捕获的苍蝇的效率略高。捕获效率归因于几个表面显示不同的功能的组合效果。蜡质区在滑综合征中起着关键作用：除了蜡质本身，凸出的月状细胞的下表皮层对昆虫的运动有很大的干扰。未浸没的腺体区显示出重要的滞留作用，消化腺的分泌物被怀疑是adhesive.Pad性能的毛和光滑的附着系统进行了讨论，以解释两种昆虫之间的差异。这项研究旨在鼓励植物-昆虫表面机制的生物力学研究。
Several epidermal microstructures characterize surfaces of pitcher plants and are presumably involved in their trapping function. Here we report the effects of Nepenthes alata surfaces on insect locomotion and trapping efficiency.The architectural designs of pitcher surfaces were characterized using scanning electron microscopy. Two insect species - fruitfly (Drosophila melanogaster) and ant (Iridomyrmex humilis) - were tested for their ability to remain and walk on them. The relative contributions of various epidermal structures to trapping ability were quantified.Pitchers were very effective traps for both insect species. They were slightly more efficient in capturing the ants, but slightly more effective in retaining captured flies. Trapping efficiency was attributed to the combined effects of several surfaces displaying different functions. The waxy zone played a key role in the slippery syndrome: in addition to the wax itself, the subjacent layer of convex lunate cells interfered considerably with insect locomotion. The unsubmersed glandular zone displayed an important retentive effect and secretions of the digestive glands are suspected to be adhesive.Pad performances of the hairy and smooth system of attachment are discussed to explain the differences between the two insect species. This study aims to encourage biomechanical studies of plant-insect surface mechanisms.