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Research article - Peer-reviewed, 2012

Floral to green: mating switches moth olfactory coding and preference

Ahmed Saveer M., Kromann H. Sophie, Birgersson Göran, Bengtsson Marie, Lindblom Tobias, Balkenius Anna, Hansson Bill, Witzgall Peter, Becher Paul G., Ignell Rickard

Abstract

Mating induces profound physiological changes in a wide range of insects, leading to behavioural adjustments to match the internal state of the animal. Here, we show for the first time, to our knowledge, that a noctuid moth switches its olfactory response from food to egg-laying cues following mating. Unmated females of the cotton leafworm (Spodoptera littoralis) are strongly attracted to lilac flowers (Syringa vulgaris). After mating, attraction to floral odour is abolished and the females fly instead to green-leaf odour of the larval host plant cotton, Gossypium hirsutum. This behavioural switch is owing to a marked change in the olfactory representation of floral and green odours in the primary olfactory centre, the antennal lobe (AL). Calcium imaging, using authentic and synthetic odours, shows that the ensemble of AL glomeruli dedicated to either lilac or cotton odour is selectively up- and downregulated in response to mating. A clear-cut behavioural modulation as a function of mating is a useful substrate for studies of the neural mechanisms underlying behavioural decisions. Modulation of odour-driven behaviour through concerted regulation of odour maps contributes to our understanding of state-dependent choice and host shifts in insect herbivores

Keywords

olfaction; mating; modulation; host finding; herbivore; Spodoptera littoralis

Published in

Proceedings of the Royal Society B: Biological Sciences
2012, volume: 279, number: 1737, pages: 2314–2322

Authors' information

Saveer, Ahmed
Swedish University of Agricultural Sciences, Department of Plant Protection Biology
Kromann, Sophie
Swedish University of Agricultural Sciences, Department of Plant Protection Biology
Swedish University of Agricultural Sciences, Department of Plant Protection Biology
Swedish University of Agricultural Sciences, Department of Plant Protection Biology
Swedish University of Agricultural Sciences, Department of Plant Protection Biology
Balkenius, Anna
Swedish University of Agricultural Sciences, Department of Plant Protection Biology
Max Planck Institute for Chemical Ecology
Swedish University of Agricultural Sciences, Department of Plant Protection Biology
Swedish University of Agricultural Sciences, Department of Plant Protection Biology
Swedish University of Agricultural Sciences, Department of Plant Protection Biology

UKÄ Subject classification

Environmental Sciences related to Agriculture and Land-use
Agricultural Science

Publication Identifiers

DOI: https://doi.org/10.1098/rspb.2011.2710

URI (permanent link to this page)

https://res.slu.se/id/publ/38462