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  Floral to green: mating switches moth olfactory coding and preference

Saveer, A. M., Kromann, S. H., Birgersson, G., Bengtsson, M., Lindblom, T., Balkenius, A., et al. (2012). Floral to green: mating switches moth olfactory coding and preference. Proceedings of the Royal Society B: Biological Sciences, 279(1737), 2314-2322. doi:10.1098/rspb.2011.2710.

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http://dx.doi.org/10.1098/rspb.2011.2710 (Publisher version)
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 Creators:
Saveer, Ahmed M., Author
Kromann, Sophie H.1, Author              
Birgersson, Göran, Author
Bengtsson, Marie, Author
Lindblom, Tobias, Author
Balkenius, Anna, Author
Hansson, Bill1, Author              
Witzgall, Peter, Author
Becher, Paul G., Author
Ignell, Rickard, Author
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1Department of Evolutionary Neuroethology, Prof. B. S. Hansson, MPI for Chemical Ecology, Max Planck Society, ou_421894              

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 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.

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 Dates: 20112012-01-192012-06-22
 Publication Status: Published in print
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 Identifiers: Other: HAN138
DOI: 10.1098/rspb.2011.2710
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Title: Proceedings of the Royal Society B: Biological Sciences
  Abbreviation : Proc. R. Soc. B
Source Genre: Journal
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Publ. Info: London : Royal Society
Pages: - Volume / Issue: 279 (1737) Sequence Number: - Start / End Page: 2314 - 2322 Identifier: ISSN: 0962-8452
CoNE: https://pure.mpg.de/cone/journals/resource/110975500577295_2