Universität zu Köln

Murmu, Meena Sriti, Hanoune, Jeremy, Choi, Abraham, Bureau, Valentin, Renou, Michel, Dacher, Matthieu and Deisig, Nina (2020). Modulatory effects of pheromone on olfactory learning and memory in moths. J. Insect Physiol., 127. OXFORD: PERGAMON-ELSEVIER SCIENCE LTD. ISSN 1879-1611

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Abstract

Pheromones are chemical communication signals known to elicit stereotyped behaviours and/or physiological processes in individuals of the same species, generally in relation to a specific function (e.g. mate finding in moths). However, recent research suggests that pheromones can modulate behaviours, which are not directly related to their usual function and thus potentially affect behavioural plasticity. To test this hypothesis, we studied the possible modulatory effects of pheromones on olfactory learning and memory in Agrotis ipsilon moths, which are well-established models to study sex-pheromones. To achieve this, sexually mature male moths were trained to associate an odour with either a reward (appetitive learning) or punishment (aversive learning) and olfactory memory was tested at medium- and long-term (1 h or 1.5 h, and 24 h). Our results show that male moths can learn to associate an odour with a sucrose reward, as well as a mild electric shock, and that olfactory memory persists over medium- and long-term range. Pheromones facilitated both appetitive and aversive olfactory learning: exposure to the conspecific sex-pheromone before conditioning enhanced appetitive but not aversive learning, while exposure to a sex-pheromone component of a heterospecific species (repellent) facilitated aversive but not appetitive learning. However, this effect was short-term, as medium- and long-term memory were not improved. Thus, in moths, pheromones can modulate olfactory learning and memory, indicating that they contribute to behavioural plasticity allowing optimization of the animal's behaviour under natural conditions. This might occur through an alteration of sensitization.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Murmu, Meena Sriti UNSPECIFIED UNSPECIFIED UNSPECIFIED Hanoune, Jeremy UNSPECIFIED UNSPECIFIED UNSPECIFIED Choi, Abraham UNSPECIFIED UNSPECIFIED UNSPECIFIED Bureau, Valentin UNSPECIFIED UNSPECIFIED UNSPECIFIED Renou, Michel UNSPECIFIED UNSPECIFIED UNSPECIFIED Dacher, Matthieu UNSPECIFIED UNSPECIFIED UNSPECIFIED Deisig, Nina UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-312628
DOI:	10.1016/j.jinsphys.2020.104159
Journal or Publication Title:	J. Insect Physiol.
Volume:	127
Date:	2020
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Place of Publication:	OXFORD
ISSN:	1879-1611
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language BLACK CUTWORM MOTH; PROBOSCIS EXTENSION; ANTENNAL LOBES; SEX-PHEROMONE; HONEY-BEES; SENSITIZATION; HABITUATION; TERM; IDENTIFICATION; LEPIDOPTERA Multiple languages Entomology; Physiology; Zoology Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/31262