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Mol Biol Evol

Title:		Odorant Receptors for Detecting Flowering Plant Cues Are Functionally Conserved across Moths and Butterflies
Author(s):		Guo M; Du L; Chen Q; Feng Y; Zhang J; Zhang X; Tian K; Cao S; Huang T; Jacquin-Joly E; Wang G; Liu Y;
Address:		"State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China. Guangdong Laboratory for Lingnan Modern Agriculture (Shenzhen Branch), Genome Analysis Laboratory of the Ministry of Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, China. INRAE, Sorbonne Universite, CNRS, IRD, UPEC, Universite de Paris, Institute of Ecology and Environmental Sciences of Paris, Versailles, France"
Journal Title:		Mol Biol Evol
Year:		2021
Volume:		38
Issue:		4
Page Number:		1413 - 1427
DOI:		10.1093/molbev/msaa300
ISSN/ISBN:		1537-1719 (Electronic) 0737-4038 (Print) 0737-4038 (Linking)
Abstract:		"Odorant receptors (ORs) are essential for plant-insect interactions. However, despite the global impacts of Lepidoptera (moths and butterflies) as major herbivores and pollinators, little functional data are available about Lepidoptera ORs involved in plant-volatile detection. Here, we initially characterized the plant-volatile-sensing function(s) of 44 ORs from the cotton bollworm Helicoverpa armigera, and subsequently conducted a large-scale comparative analysis that establishes how most orthologous ORs have functionally diverged among closely related species whereas some rare ORs are functionally conserved. Specifically, our systematic analysis of H. armigera ORs cataloged the wide functional scope of the H. armigera OR repertoire, and also showed that HarmOR42 and its Spodoptera littoralis ortholog are functionally conserved. Pursuing this, we characterized the HarmOR42-orthologous ORs from 11 species across the Glossata suborder and confirmed the HarmOR42 orthologs form a unique OR lineage that has undergone strong purifying selection in Glossata species and whose members are tuned with strong specificity to phenylacetaldehyde, a floral scent component common to most angiosperms. In vivo studies via HarmOR42 knockout support that HarmOR42-related ORs are essential for host-detection by sensing phenylacetaldehyde. Our work also supports that these ORs coevolved with the tube-like proboscis, and has maintained functional stability throughout the long-term coexistence of Lepidoptera with angiosperms. Thus, beyond providing a rich empirical resource for delineating the precise functions of H. armigera ORs, our results enable a comparative analysis of insect ORs that have apparently facilitated and currently sustain the intimate adaptations and ecological interactions among nectar feeding insects and flowering plants"
Keywords:		"Animals Butterflies/*genetics Female *Herbivory Male Moths/*genetics *Phylogeny Receptors, Odorant/*genetics Volatile Organic Compounds Helicoverpa armigera Glossata odorant receptor phenylacetaldehyde plant volatile;"
Notes:		"MedlineGuo, Mengbo Du, Lixiao Chen, Qiuyan Feng, Yilu Zhang, Jin Zhang, Xiaxuan Tian, Ke Cao, Song Huang, Tianyu Jacquin-Joly, Emmanuelle Wang, Guirong Liu, Yang eng Comparative Study Research Support, Non-U.S. Gov't 2020/11/25 Mol Biol Evol. 2021 Apr 13; 38(4):1413-1427. doi: 10.1093/molbev/msaa300"