FATE OF IRIDOID GLYCOSIDES IN DIFFERENT LIFE STAGES OF THE BUCKEYE, JUNONIA-COENIA (LEPIDOPTERA, NYMPHALIDAE)
FATE OF IRIDOID GLYCOSIDES IN DIFFERENT LIFE STAGES OF THE BUCKEYE, JUNONIA-COENIA (LEPIDOPTERA, NYMPHALIDAE)
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DOI：
10.1007/bf00988322
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发表时间：
1992-06-01
影响因子：
2.3
通讯作者：
COLLINGE, SK
中科院分区：
文献类型：
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作者：
BOWERS, MD;COLLINGE, SK
七叶树蝴蝶Junonia coenia（鳞翅目：睡蝶科）专门研究含有环烯醚萜苷的植物。为了确定这些化合物在幼虫，蛹，和成年人的这个物种的命运，我们饲养的幼虫人工饲料环烯醚萜苷和不环烯醚萜苷，和叶子上的宿主植物，车前草（Plantago lanceolata）（车前草科）。用气相色谱法定量分析表明，在杉木叶上饲养的新蜕皮的三龄、四龄和五龄幼虫分别含有5.13%、2.88%和6.83%干重的环烯醚萜苷。与此相反，平均环烯醚萜苷浓度的积极喂养的五龄幼虫是0.28%干重，蛹是0.19%干重环烯醚萜，和成人没有检测到环烯醚萜。喂养实验表明，这种减少积极喂养幼虫是由于环烯醚萜苷的代谢。这些实验中的披针叶树叶含有平均1.00%干重的环烯醚萜苷，桃叶珊瑚苷与梓醇的比例为2：1。计算环烯醚萜消费和利用指数表明，幼虫喂人工饲料消耗，消化，并以类似的方式螯合桃叶珊瑚苷和梓醇。当这些指数计算幼虫喂养的叶片的杉木，梓醇的螯合效率的两倍桃叶珊瑚甙。
The buckeye butterfly, Junonia coenia (Lepidoptera:Nymphalidae), specializes on plants that contain iridoid glycosides. To determine the fate of these compounds in larvae, pupae, and adults of this species, we reared larvae on artificial diets with and without iridoid glycosides, and on leaves of a host plant, Plantago lanceolata (Plantaginaceae). Quantification by gas chromatography showed that newly molted third-, fourth-, and fifth-instar larvae reared on leaves of P. lanceolata contained means of 5.13, 2.88, and 6.83% dry weight iridoid glycoside. In contrast, the mean iridoid glycoside concentration of actively feeding fifth-instar larvae was 0.28% dry weight, that of pupae was 0.19% dry weight iridoids, and adults contained no detectable iridoids. Feeding experiments suggested that this reduction in actively feeding larvae was due to the metabolism of iridoid glycosides. P. lanceolata leaves in these experiments contained a mean of 1.00% dry weight iridoid glycoside, with a 2:1 ratio of aucubin to catalpol. Calculation of iridoid consumption and utilization indices showed that larvae fed artificial diets consumed, digested, and sequestered aucubin and catalpol in similar ways. When these indices were calculated for larvae fed leaves of P. lanceolata, catalpol was sequestered twice as efficiently as aucubin.