« Previous Abstract"Field evaluation of a phototoxic dye, phloxine B, against three species of fruit flies (Diptera: Tephritidae)"    Next Abstract"Bromine enrichment in marsh sediments as a marker of environmental changes driven by Grand Solar Minima and anthropogenic activity (Caminha, NW of Portugal)" »

J Insect Physiol

Title:		Differences in olfactory sensitivity and odor detection correlate with foraging task specialization in honeybees Apis mellifera
Author(s):		Moreno E; Jose Corriale M; Arenas A;
Address:		"Laboratorio de Insectos Sociales, Departamento de Biodiversidad y Biologia Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina; Instituto de Fisiologia, Biologia Molecular y Neurociencias (IFIBYNE), CONICET Universidad de Buenos Aires, Buenos Aires, Argentina. Grupo de Estudios sobre Biodiversidad en Agroecosistemas, Departamento de Biodiversidad y Biologia Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina; Instituto de Ecologia Genetica y Evolucion de Buenos Aires (IEGEBA), UBA-CONICET, Ciudad Autonoma de Buenos Aires, Argentina. Laboratorio de Insectos Sociales, Departamento de Biodiversidad y Biologia Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina; Instituto de Fisiologia, Biologia Molecular y Neurociencias (IFIBYNE), CONICET Universidad de Buenos Aires, Buenos Aires, Argentina. Electronic address: aarenas@bg.fcen.uba.ar"
Journal Title:		J Insect Physiol
Year:		2022
Volume:		20220630
Issue:
Page Number:		104416 -
DOI:		10.1016/j.jinsphys.2022.104416
ISSN/ISBN:		1879-1611 (Electronic) 0022-1910 (Linking)
Abstract:		"Division of labor is central to the ecological success of social insects. Among honeybees foragers, specialization for collecting nectar or pollen correlates with their sensitivity to gustatory stimuli (e.g. sugars). We hypothesize that pollen and nectar foragers also differ in their sensitivity to odors, and therefore in their likelihood to show odor-mediated responses. To assess foragers sensitivity to natural odors, we quantified the conditioning of the proboscis extension reflex (PER) to increasing concentrations (0.001; 0.01; 0.1; 1?ª+M) of linalool or nonanal. Furthermore, we compared electroantennogram (EAG) recordings to correlate bees' conditioned responses with the electrophysiological responses of their antennae. To further explore differences of the antennal response of foragers in relation to task-related odors, we registered EAG signals for two behaviorally ''meaningful'' odors that mediate pollen collection: fresh pollen odors and the brood pheromone (E)-beta-ocimene. Pollen foragers performed better than nectar foragers in PER conditioning trials when linalool and nonanal were presented at low concentrations (0.001, 0.01?ª+M). Consistently, their antennae showed stronger EAG signals (higher amplitudes) to these odors, suggesting that differences in sensitivity can be explained at the periphery of the olfactory system. Pollen and nectar foragers detect pollen odors differently, but not (E)-beta-ocimene. Pollen volatiles evoked EAG signals with hyper and depolarization components. In pollen foragers, the contribution of the hyperpolarization component was higher than in nectar foragers. We discuss our findings in terms of adaptive advantages to learn subtle olfactory cues that influence the ability to better identify/discriminate food sources"
Keywords:		Animals Bees *Odorants Pheromones *Plant Nectar Pollen Smell Electroantennography (EAG) Foraging division of labor Honeybee (Apis mellifera L) Odor Sensitivity Pollen volatiles;
Notes:		"MedlineMoreno, Emilia Jose Corriale, Maria Arenas, Andres eng Research Support, Non-U.S. Gov't England 2022/07/06 J Insect Physiol. 2022 Aug-Sep; 141:104416. doi: 10.1016/j.jinsphys.2022.104416. Epub 2022 Jun 30"