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Front Behav Neurosci

Title:		An alarm pheromone modulates appetitive olfactory learning in the honeybee (apis mellifera)
Author(s):		Urlacher E; Frances B; Giurfa M; Devaud JM;
Address:		"Research Center on Animal Cognition, National Center for Scientific Research, University Paul Sabatier Toulouse, France"
Journal Title:		Front Behav Neurosci
Year:		2010
Volume:		20100830
Issue:
Page Number:		-
DOI:		10.3389/fnbeh.2010.00157
ISSN/ISBN:		1662-5153 (Electronic) 1662-5153 (Linking)
Abstract:		"In honeybees, associative learning is embedded in a social context as bees possess a highly complex social organization in which communication among individuals is mediated by dance behavior informing about food sources, and by a high variety of pheromones that maintain the social links between individuals of a hive. Proboscis extension response conditioning is a case of appetitive learning, in which harnessed bees learn to associate odor stimuli with sucrose reward in the laboratory. Despite its recurrent use as a tool for uncovering the behavioral, cellular, and molecular bases underlying associative learning, the question of whether social signals (pheromones) affect appetitive learning has not been addressed in this experimental framework. This situation contrasts with reports underlining that foraging activity of bees is modulated by alarm pheromones released in the presence of a potential danger. Here, we show that appetitive learning is impaired by the sting alarm pheromone (SAP) which, when released by guards, recruits foragers to defend the hive. This effect is mimicked by the main component of SAP, isopentyl acetate, is dose-dependent and lasts up to 24 h. Learning impairment is specific to alarm signal exposure and is independent of the odorant used for conditioning. Our results suggest that learning impairment may be a response to the biological significance of SAP as an alarm signal, which would detract bees from responding to any appetitive stimuli in a situation in which such responses would be of secondary importance"
Keywords:		alarm honeybee insect learning modulation olfactory pheromone stress;
Notes:		"PubMed-not-MEDLINEUrlacher, Elodie Frances, Bernard Giurfa, Martin Devaud, Jean-Marc eng Switzerland 2010/09/15 Front Behav Neurosci. 2010 Aug 30; 4:157. doi: 10.3389/fnbeh.2010.00157. eCollection 2010"