Higher plasticity in feeding preference of a generalist than a specialist: experiments with two closely related Helicoverpa species.
Higher plasticity in feeding preference of a generalist than a specialist: experiments with two closely related Helicoverpa species.
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通才的摄食偏好可塑性高于专才：对两种密切相关的 Helicoverpa 物种进行的实验
DOI：
10.1038/s41598-017-18244-7
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发表时间：
2017-12-19
影响因子：
4.6
通讯作者：
van Loon JJA
中科院分区：
文献类型：
--
作者：
Wang Y;Ma Y;Zhou DS;Gao SX;Zhao XC;Tang QB;Wang CZ;van Loon JJA
食草性昆虫根据它们作为食物或产卵基质的植物的分类相关性被分类为通才或专家。这两类昆虫寄主选择行为的可塑性还没有引起足够的重视。本研究以通用型棉铃虫Helicoverpaarmigera及其近缘种烟青虫Helicoverpaassulta的5龄幼虫为材料，分别用普通寄主植物和人工饲料饲养，然后采用植物双重选择和植物三重选择的方法，对它们的取食选择性进行了研究。结果表明，两种棉铃虫对寄主植物都有一定的偏好等级。与专化型烟青虫的固定偏好等级相比，泛化型棉铃虫对寄主植物的取食偏好具有广泛的可塑性。而specialistH. assulta表现出严格的偏好，在双重和三重植物选择试验，我们的研究结果表明，generalistH. armigera表达更强的偏好，在双重植物选择试验比在三重植物选择试验。我们的研究结果提供了额外的证据支持神经约束假说，该假说预测，通才食草动物在选择植物时比专家做出更不准确的决定。
Herbivorous insects have been categorized as generalists or specialists depending on the taxonomic relatedness of the plants they use as food or oviposition substrates. The plasticity in host plant selection behavior of species belonging to the two categories received little attention. In the present work, fifth instar caterpillars of the generalist herbivoreHelicoverpa armigeraand its closely related species, the specialistHelicoverpa assulta, were fed on common host plants or artificial diet, after which their feeding preference was assessed individually by using dual - and triple- plant choice assays. Results show both the twoHelicoverpaspecies have a preference hierarchy for host plants. Compared to the fixed preference hierarchy of the specialistH.assulta, the generalistH.armigeraexhibited extensive plasticity in feeding preference depending on the host plant experienced during larval development. Whereas the specialistH.assultaexhibited a rigid preference in both dual and triple-plant choice assays, our findings demonstrate that the generalistH.armigeraexpressed stronger preferences in the dual-plant choice assay than in the triple-plant choice assay. Our results provide additional evidence supporting the neural constraints hypothesis which predicts that generalist herbivores make less accurate decisions than specialists when selecting plants.
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影响因子：
56.9
作者：
Finke, Deborah L.;Snyder, William E.
通讯作者：
Snyder, William E.
影响因子：
4.8
作者：
Jones, CG;Lawton, JH;Shachak, M
通讯作者：
Shachak, M
影响因子：
4.8
作者：
DUKAS, R;ELLNER, S
通讯作者：
ELLNER, S
DOI：
10.1007/s00359-009-0434-7
发表时间：
2009-06-01
影响因子：
2.1
作者：
Glendinning, John I.;Foley, Cassidy;Rai, Meelu
通讯作者：
Rai, Meelu
影响因子：
1.9
作者：
BERGER, A
通讯作者：
BERGER, A