Geosmin suppresses defensive behaviour and elicits unusual neural responses in honey bees.

Details

Ressource 1Download: 41598_2023_Article_30796.pdf (5205.33 [Ko])
State: Public
Version: Final published version
License: CC BY 4.0
Serval ID
serval:BIB_3257F6C0F508
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Geosmin suppresses defensive behaviour and elicits unusual neural responses in honey bees.
Journal
Scientific reports
Author(s)
Scarano F., Deivarajan Suresh M., Tiraboschi E., Cabirol A., Nouvian M., Nowotny T., Haase A.
ISSN
2045-2322 (Electronic)
ISSN-L
2045-2322
Publication state
Published
Issued date
08/03/2023
Peer-reviewed
Oui
Volume
13
Number
1
Pages
3851
Language
english
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: epublish
Abstract
Geosmin is an odorant produced by bacteria in moist soil. It has been found to be extraordinarily relevant to some insects, but the reasons for this are not yet fully understood. Here we report the first tests of the effect of geosmin on honey bees. A stinging assay showed that the defensive behaviour elicited by the bee's alarm pheromone component isoamyl acetate (IAA) is strongly suppressed by geosmin. Surprisingly, the suppression is, however, only present at very low geosmin concentrations, and disappears at higher concentrations. We investigated the underlying mechanisms at the level of the olfactory receptor neurons by means of electroantennography, finding the responses to mixtures of geosmin and IAA to be lower than to pure IAA, suggesting an interaction of both compounds at the olfactory receptor level. Calcium imaging of the antennal lobe (AL) revealed that neuronal responses to geosmin decreased with increasing concentration, correlating well with the observed behaviour. Computational modelling of odour transduction and coding in the AL suggests that a broader activation of olfactory receptor types by geosmin in combination with lateral inhibition could lead to the observed non-monotonic increasing-decreasing responses to geosmin and thus underlie the specificity of the behavioural response to low geosmin concentrations.
Keywords
Bees, Animals, Receptors, Odorant, Odorants, Pheromones/pharmacology, Naphthols
Pubmed
Web of science
Open Access
Yes
Create date
16/03/2023 10:12
Last modification date
16/11/2023 8:14
Usage data