Stenusine, an antimicrobial agent in the rove beetle genus Stenus (Coleoptera, Staphylinidae)
Stenusine, an antimicrobial agent in the rove beetle genus Stenus (Coleoptera, Staphylinidae)
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DOI：
10.1007/s00114-008-0374-z
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发表时间：
2008-08-01
影响因子：
--
通讯作者：
Seifert, Karlheinz
中科院分区：
文献类型：
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作者：
Lusebrink, Inka;Dettner, Konrad;Seifert, Karlheinz
Stenusine是一种已知的生物碱，由隐翅虫属Stenus Latreille（鞘翅目，隐翅虫科）释放。在水面上时，Stenus甲虫利用生物碱作为逃跑机制。在危险的情况下，它们会降低腹部并从臀腺中释放出stenusine。Stenusine显示出低表面张力，因此具有高扩散压力;这些特性推动甲虫在水面上快速移动。许多Steninae不生活在有开放沃茨的栖息地，而是生活在碎屑、落叶、苔藓等中。作为抗生素或杀真菌剂。Stenus甲虫表现出强烈的理毛行为。通过气相色谱-质谱分析，我们可以证明它们用自己的分泌物覆盖自己。为了测试其抗微生物特性，我们用stenusine和norstenusine进行了琼脂扩散测试，这是另一种在大多数Stenus物种中丰富的物质。这两种化合物对昆虫病原细菌和真菌具有抗微生物作用。Stenusine不仅允许在水面上移动的非凡方法，它还保护Steninae免受微生物的侵扰。
Stenusine is well known as the alkaloid, discharged by the rove beetle, genus Stenus Latreille (Coleoptera, Staphylinidae). The Stenus beetles employ the alkaloid as an escape mechanism when on water surfaces. In the case of danger, they lower their abdomen and emit stenusine from their pygidial glands. Stenusine shows a low surface tension and therefore a high spreading pressure; these properties propel the beetle quickly over the water. Many Steninae do not live in habitats with open waters, but in detritus, leaf litter, mosses, etc. This raises the possibility that stenusine might also have another function, e.g., as antibiotic or fungicide. Stenus beetles show an intense grooming behaviour. With gas chromatography-mass spectrometry analyses we could prove that they cover themselves with their secretion. To tests its antimicrobial properties we conducted agar diffusion tests with stenusine and norstenusine, another substance that is abundant in most Stenus species. Both compounds have an antimicrobial effect on entomopathogenic bacteria and fungi. Stenusine not only allows for an extraordinary method of locomotion on water surfaces, it also protects the Steninae from being infested with microorganisms.