Functional evolution of Lepidoptera olfactory receptors revealed by deorphanization of a moth repertoire

Arthur de Fouchier, William B. Walker, Nicolas Montagné, Claudia Steiner, Muhammad Binyameen, Fredrik Schlyter, Thomas Chertemps, Annick Maria, Marie-Christine François, Christelle Monsempes, Peter Anderson, Bill S. Hansson, Mattias C. Larsson () and Emmanuelle Jacquin-Joly ()
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Arthur de Fouchier: INRA, Institute of Ecology & Environmental Sciences of Paris
William B. Walker: Swedish University of Agricultural Sciences
Nicolas Montagné: Sorbonne Universités—UPMC University Paris 06, Institute of Ecology & Environmental Sciences of Paris
Claudia Steiner: Swedish University of Agricultural Sciences
Muhammad Binyameen: Swedish University of Agricultural Sciences
Fredrik Schlyter: Swedish University of Agricultural Sciences
Thomas Chertemps: Sorbonne Universités—UPMC University Paris 06, Institute of Ecology & Environmental Sciences of Paris
Annick Maria: Sorbonne Universités—UPMC University Paris 06, Institute of Ecology & Environmental Sciences of Paris
Marie-Christine François: INRA, Institute of Ecology & Environmental Sciences of Paris
Christelle Monsempes: INRA, Institute of Ecology & Environmental Sciences of Paris
Peter Anderson: Swedish University of Agricultural Sciences
Bill S. Hansson: Max Planck Institute for Chemical Ecology
Mattias C. Larsson: Swedish University of Agricultural Sciences
Emmanuelle Jacquin-Joly: INRA, Institute of Ecology & Environmental Sciences of Paris

Nature Communications, 2017, vol. 8, issue 1, 1-11

Abstract: Abstract Insects detect their hosts or mates primarily through olfaction, and olfactory receptors (ORs) are at the core of odorant detection. Each species has evolved a unique repertoire of ORs whose functional properties are expected to meet its ecological needs, though little is known about the molecular basis of olfaction outside Diptera. Here we report a pioneer functional analysis of a large array of ORs in a lepidopteran, the herbivorous pest Spodoptera littoralis. We demonstrate that most ORs are narrowly tuned to ubiquitous plant volatiles at low, relevant odorant titres. Our phylogenetic analysis highlights a basic conservation of function within the receptor repertoire of Lepidoptera, across the expansive evolutionary radiation of different major clades. Our study provides a reference for further studies of olfactory mechanisms in Lepidoptera, a historically crucial insect order in olfactory research.

Date: 2017
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DOI: 10.1038/ncomms15709

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