数字农科院2.0

Orco mediates olfactory behaviors and winged morph differentiation induced by alarm pheromone in the grain aphid, Sitobion avenae

文献类型： 外文期刊

作者： Zhang, Yong;Cheng, Dengfa;Sun, Jingrun;Chen, Julian;Francis, Frederic

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关键词： Aphid;Olfactory coreceptor (Orco);RNAi;Electroantennogram (EAG);Winged morph differentiation;Olfactometer

期刊名称： INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY

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年卷期：

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收录情况： SCI

摘要： Olfaction is crucial for short distance host location and pheromone detection by insects. Complexes of olfactory receptors (ORs) are composed of odor-specific ORs and OR co-receptors (Orco). Orcos are widely co-expressed with odor-specific ORs and are conserved across insect taxa. A number of Orco orthologs have been studied to date, although none has been identified in cereal aphids. In this study, an Orco gene ortholog was cloned from the grain aphid, Sitobion avenae, and named "SaveOrco"; RNA interference (RNAi) reduced the expression of SaveOrco to 34.11% in aphids, resulting in weaker EAG (electroantennogram) responses to plant volatiles (Z-3-hexene-1-ol; methyl salicylate, MeSA) and aphid alarm pheromone (E-beta-famesene, EBF). Aphid wing differentiation induced by EBF was investigated in both RNAi treated and untreated aphids. EBF induced production of winged aphids in both pre-natal and postnatal periods in untreated aphids, but no such induction was observed in the RNAi-treated aphids. We conclude that SaveOrco is crucial for the aphid's response to pheromones and other volatiles, and is involved in wing differentiation triggered by EBF. (C) 2015 The Authors. Published by Elsevier Ltd.

分类号： Q5

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