Differing patterns of sequestration of iridoid glycosides in the Mecininae (Coleoptera, Curculionidae)

Differing patterns of sequestration of iridoid glycosides in the Mecininae (Coleoptera, Curculionidae)
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Mecininae(鞘翅目、象甲科)中环烯醚萜苷的不同封存模式

DOI:
10.1007/s00049-012-0103-0
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发表时间:
2012
期刊:
影响因子:
1.8
通讯作者:
Dobler S.
Dobler S.
中科院分区:
环境科学与生态学3区
文献类型:
--
作者:
Baden C.U;Franke S;Dobler S.

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我们分析了几种以车前科车前科植物为食的象甲亚科(鞘翅目,车前科),以研究这些甲虫是否将这些威慑物质从它们的寄主植物中隔离出来。在梅西尼亚科中,发现乔尼尼部落的两个属隔离了桃叶珊瑚苷和catalpol:CionusClairvilleandSchellenbergandCleopusDejean.这两个被分析的Mecinini属,Mecinus Germarens和RhinusaStephens,都不会隔离IGs,尽管这些化合物存在于它们的食用植物中。因此,他们代表了第一个关于IG植物的专家没有进化出适应使用这些化合物的案例。然而,与乔尼尼人相比,这些属的人有一种隐藏的生活方式,因此他们对防御的需求可能会更低。Cionus和Cleopus对梓醇的分离效率均高于桃叶珊瑚。然而,与金龟子属物种不同的是,金龟子属物种只隔离梓醇。在以玄参为食的物种中,桃叶珊瑚苷的浓度较高,而在以藜芦醇为食的甲虫中,桃叶珊瑚苷通常占主导地位。这种模式也可以在仅有的生活在这两种植物上的物种身上检测到,这一物种是北极熊。隔离免疫球蛋白的能力必须在姐妹属Cionus和Cleopus的基础上具有单一来源。
We analyzed several species of the weevil family Mecininae (Coleoptera, Curculionidae) that all feed on iridoid glycoside (IG) containing plants of the Plantaginaceae to investigate whether the beetles sequester these deterrent substances from their host plants. Within the Mecininae two genera of the tribe Cionini were found to sequester aucubin and catalpol:CionusClairvilleandSchellenbergandCleopusDejean. Both analyzed genera of the Mecinini,MecinusGermarandRhinusaStephens, do not sequester IGs although the compounds are present in their food plants. They thus represent the first case of specialists on IG plants that have not evolved adaptations to use the compounds. However, in contrast to the Cionini these genera have a hidden lifestyle, so that their need for defence might be lower. BothCionusandCleopus, sequester catalpol with a higher efficiency than aucubin. However, in contrast toCionusspecies,Cleopusspecies only sequester catalpol. In species feeding onScrophularia, the aucubin concentration is higher while in beetles onVerbascumcatalpol is usually dominating. This pattern can also be detected in the only species living on both plants,Cionus hortulanus. The ability to sequester IGs must have a single origin at the base of the sister generaCionusandCleopus.
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