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Modulation of olfactory information in the antennal lobe of Spodoptera littoralis

Kromann, Anne Sophie Haastrup (2012). Modulation of olfactory information in the antennal lobe of Spodoptera littoralis. Diss. (sammanfattning/summary) Alnarp, Sweden : Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae, 1652-6880 ; 2012:60
ISBN 978-91-576-7707-5
[Doctoral thesis]

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Abstract

In order to respond appropriately to external stimuli, e.g. odours in the environment,insects have to evaluate these stimuli in a context of relevance and need. These decisions are, in turn, based on internal physiological status, such as mating status.
In the cotton leafworm, Spodoptera littoralis, mating induces profound physiological changes that alter the behavioural output to fit with the current needs of the animal. In female S. littoralis, mating switches the behavioural attraction from food sources to oviposition sites and concurrently down- and up-regulates olfactory neuron sensitivity. This switch in olfactory sensitivity is correlated with a transient increase in dopamine levels in the primary olfactory brain centres, the antennal lobes.
In male S. littoralis, mating induces a transient behavioural and olfactory inhibition towards female-emitted sex pheromone as well as to mating site-related odours. However, responses towards food sources remain constant. The shift in olfactory responsiveness is not correlated with changes in dopamine levels, but may be regulated by neuropeptides expressed in the olfactory system. Distribution patterns of 6 of the most abundant neuropeptides reveal distinct differential expressions within the antennal lobe glomerular array, providing the possibility for selective and state-dependent modulation of the olfactory system.

Authors/Creators:Kromann, Anne Sophie Haastrup
Title:Modulation of olfactory information in the antennal lobe of Spodoptera littoralis
Series/Journal:Acta Universitatis agriculturae Sueciae (1652-6880)
Year of publishing :2012
Volume:2012:60
Number of Pages:52
Papers/manuscripts:
NumberReferences
IA.M. Saveer, S.H. Kromann, G. Birgersson, M. Bengtsson, T. Lindblom, A. Balkenius, B.S. Hansson, P. Witzgall, P.G. Becher and R. Ignell (2012). Floral to green: mating switches moth olfactory coding and preference. Proc. R. Soc. B 279(1737), 2314-2322.
IIA-E. Félix, S.H. Kromann, J-B. Gramsbergen, B.S. Hansson, R. Ignell. Dopamine regulates the mating switch in olfactory coding and preference in a female moth (manuscript).
IIIS.H. Kromann, A.M. Saveer, M. Binyameen, M. Bengtsson, G. Birgersson, B.S. Hansson, F. Schlyter, P. Witzgall, R. Ignell and P. G. Becher. Concurrent modulation of olfactory responses to sex and host plant cues in a male moth (manuscript).
IVS.H. Kromann, B.S. Hansson and R. Ignell. Distribution of neuropeptides in the antennal lobes of male Spodoptera littoralis (manuscript).
Place of Publication:Alnarp, Sweden
Publisher:Dept. of Plant Protection Biology, Swedish University of Agricultural Sciences
ISBN for printed version:978-91-576-7707-5
ISSN:1652-6880
Language:English
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:X Agricola extesions > X30 Life sciences
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Other Biological Topics
Agrovoc terms:spodoptera littoralis, olfactory organs, copulation, neuropeptides
Keywords:Spodoptera littoralis, Olfaction, Modulation, Mating, Neuromodulators
URN:NBN:urn:nbn:se:slu:epsilon-e-603
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-603
ID Code:9021
Department:(LTJ, LTV) > Department of Plant Protection Biology
Deposited By: sophie kromann
Deposited On:04 Sep 2012 11:37
Metadata Last Modified:02 Dec 2014 10:51

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