Effect of hostplant genotype and predators on iridoid glycoside content of pupae of a specialist insect herbivore, Junonia coenia (Nymphalidae)
Effect of hostplant genotype and predators on iridoid glycoside content of pupae of a specialist insect herbivore, Junonia coenia (Nymphalidae)
复制标题
DOI：
10.1016/s0305-1978(97)00058-6
复制
发表时间：
1997-10-01
影响因子：
1.6
通讯作者：
Stamp, NE
中科院分区：
文献类型：
--
作者：
Bowers, MD;Stamp, NE
两个现场实验评估的影响寄主基因型，存在或不存在的捕食者，和类型的捕食者的化学含量的七叶树蝴蝶，Junonia coenia（Nymphalidae）的蛹。当喂食车前（Plantago lanceolata）（车前草科）时，J. coenia幼虫隔离两种环烯醚萜苷，桃叶珊瑚苷和梓醇，它们保留到蛹阶段。在第一个实验中，它被发现，寄主植物基因型显着影响蛹环烯醚萜苷含量，但尽管捕食性蝽（Podisus maculiventris：蝽科）引起的幼虫改变其觅食行为，蛹环烯醚萜苷含量不受捕食者的存在或不存在。在第二个实验中，它被发现，这种捕食者存在的化学防御的蛹：蛹幼虫暴露于蝽有较高比例的梓醇比蛹幼虫暴露于胡蜂，Polistes fuscatus（胡蜂科）。此外，两个实验中的蛹所含梓醇比例均高于幼虫赖以为食的植物中的含量。因此，草食性幼虫发育的条件，如寄主基因型和天敌的类型，可以影响其化学含量。(C)1997 Elsevier Science Ltd.
Two field experiments assessed the effects of hostplant genotype, presence or absence of predators, and type of predator on chemical content of pupae of the Buckeye butterfly, Junonia coenia (Nymphalidae). When fed Plantago lanceolata (Plantaginaceae), J. coenia larvae sequester two iridoid glycosides, aucubin and catalpol, which are retained into the pupal stage. In the first experiment, it is found that hostplant genotype significantly affected iridoid glycoside content of pupae, but although the predatory stinkbugs (Podisus maculiventris: Pentatomidae) caused the larvae to alter their foraging behavior, pupal iridoid glycoside content was not influenced by the presence or absence of the predators. In the second experiment, it is found that the kind of predator present had an effect on chemical defense of pupae: pupae exposed as larvae to stinkbugs had a higher proportion of catalpol than pupae exposed as larvae to wasps, Polistes fuscatus (Vespidae). Furthermore, pupae from both experiments contained higher proportions of catalpol than that available in the plants on which larvae fed. Therefore, the conditions under which herbivorous larvae develop, such as hostplant genotype eaten and type of natural enemies present, can affect their chemical content. (C) 1997 Elsevier Science Ltd.