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Aromatic Volatiles and Odorant Receptor 25 Mediate Attraction of Eupeodes corollae to Flowers

文献类型： 外文期刊

作者： Li, Hui-Min 1 ; Liu, Wen-Biao 1 ; Yang, Lu-Lu 1 ; Cao, Hai-Qun 2 ; Pelosi, Paolo 3 ; Wang, Gui-Rong 4 ; Wang, Bing 1 ;

作者机构： 1.Chinese Acad Agr Sci, State Key Lab Biol Plant Dis & Insect Pests, Inst Plant Protect, Beijing 100193, Peoples R China

2.Anhui Agr Univ, Coll Plant Protect, Hefei 230036, Anhui, Peoples R China

3.AIT Austrian Inst Technol GmbH, Biosensor Technol, A-3430 Tulln, Austria

4.Chinese Acad Agr Sci, State Key Lab Biol Plant Dis & Insect Pests, Inst Plant Protect, Agr Genom Inst Shenzhen, Beijing 100193, Peoples R China

5.Chinese Acad Agr Sci, Guangdong Lab Linnan Modern Agr, Agr Genom Inst Shenzhen, Beijing 100193, Peoples R China

关键词： Eupeodes corollae; odorant receptor; eugenol; methyl eugenol; pollination; natural enemy

期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：5.279； 五年影响因子：5.269 ）

ISSN： 0021-8561

年卷期： 2020 年 68 卷 44 期

页码：

收录情况： SCI

摘要： Flowering plants attract pollinators with volatile chemicals that include aromatic compounds. Syrphid flies are the largest group of flower visitors in Diptera, but little is known about how they detect floral scents at the molecular level. Here, electroantennogram (EAG) recordings from the antennae of Eupeodes corollae were used to measure responses from 14 aromatic compounds. To identify odorant receptors (ORs) of E. corollae tuned to aromatic volatiles, we analyzed functional profiles of Drosophila melanogaster odorant receptors (ORs), DmelOR46a and DmelOR71a, which are narrowly tuned to phenolic compounds and represent the orthologues of E. corollae OR25 and OR28, respectively. The two genes that are expressed in the antennae of both sexes were functionally characterized. EcorOR25 is narrowly tuned to several structurally related floral scent volatiles, including eugenol, p-cresol, and methyl eugenol. Finally, choice behavior assays showed that eugenol and methyl eugenol were attractants for both sexes of E. corollae adults. This study identified the odorant receptors used by E. corollae to detect aromatic volatiles, suggesting environmentally friendly strategies to attract these beneficial insects.

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