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Brief predator sound exposure elicits behavioral and neuronal long-term sensitization in the olfactory system of an insect

Anton, Sylvia and Evengaard, Katarina and Barrozo, Romina B. and Anderson, Peter and Skals, Niels (2011). Brief predator sound exposure elicits behavioral and neuronal long-term sensitization in the olfactory system of an insect. Proceedings of the National Academy of Sciences of the United States of America. 108:8, 3401-3405
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Abstract

Modulation of sensitivity to sensory cues by experience is essential for animals to adapt to a
changing environment. Sensitization and adaptation to signals of the same modality as a
function of experience have been shown in many cases and some of the neurobiological
mechanisms underlying these processes have been described. However, the influence of
sensory signals on the sensitivity of a different modality is largely unknown. In males of the
noctuid moth, Spodoptera littoralis, the sensitivity to the female-produced sex pheromone
increases 24 h after a brief pre-exposure with pheromone at the behavioral and central nervous
level. Here we show that this effect is not confined to the same sensory modality: the
sensitivity of olfactory neurons can also be modulated by exposure to a different sensory
stimulus, i.e. a pulsed stimulus mimicking echolocating sounds from attacking insectivorous
bats. We tested responses of pre-exposed male moths in a walking bioassay and recorded from
neurons in the primary olfactory centre, the antennal lobe. We show that brief exposure to a bat
call, but not to a behaviorally irrelevant tone, increases the behavioral sensitivity of male moths
to sex pheromone 24 h later in the same way as exposure to the sex pheromone itself. The
observed behavioral modification is accompanied by an increase in the sensitivity of olfactory
neurons in the antennal lobe. Our data provide thus evidence for cross-modal experiencedependent
plasticity not only on the behavioral, but also on the central nervous level in an
insect.

Authors/Creators:Anton, Sylvia and Evengaard, Katarina and Barrozo, Romina B. and Anderson, Peter and Skals, Niels
Title:Brief predator sound exposure elicits behavioral and neuronal long-term sensitization in the olfactory system of an insect
Series/Journal:Proceedings of the National Academy of Sciences of the United States of America (0027-8424)
Year of publishing :2011
Volume:108
Number:8
Page range:3401-3405
Publisher:National Academy of Sciences
ISSN:0027-8424
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Accepted version
Full Text Status:Public
Agris subject categories.:L Animal production > L50 Animal physiology and biochemistry
Subjects:Obsolete subject words > NATURAL SCIENCES > Biology
Keywords:sexual behavior, sex pheromones, bat sound, antennal lobes, intracellular, insects
URN:NBN:urn:nbn:se:slu:epsilon-e-224
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-224
Additional ID:
Type of IDID
DOI10.1073/pnas.1008840108
ID Code:8359
Department:(LTJ, LTV) > Department of Plant Protection Biology
Deposited By: Jenny Casey Eriksson
Deposited On:12 Oct 2011 08:11
Metadata Last Modified:02 Dec 2014 10:47

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