Temporal modulation and adaptive control of the behavioural response to odours in Rhodnius prolixus
| Autor: | Louise Couton, Claudio R. Lazzari, Romina B. Barrozo, Aurélie Bodin |
|---|---|
| Přispěvatelé: | Institut de recherche sur la biologie de l'insecte UMR7261 (IRBI), Université de Tours-Centre National de la Recherche Scientifique (CNRS), Physiologie de l'Insecte : Signalisation et Communication (PISC), Institut National de la Recherche Agronomique (INRA)-Université Pierre et Marie Curie - Paris 6 (UPMC)-AgroParisTech, Université de Tours (UT)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2008 |
| Předmět: |
0106 biological sciences
Chemoreceptor Physiology media_common.quotation_subject Circadian clock Context (language use) Endogeny Olfaction Insect Biology 01 natural sciences Feces 03 medical and health sciences parasitic diseases Animals Rhodnius prolixus 030304 developmental biology media_common Appetitive Behavior 0303 health sciences Chronobiology Ecology fungi Carbon Dioxide biology.organism_classification Adaptation Physiological Chemoreceptor Cells Circadian Rhythm 010602 entomology Rhodnius Insect Science Odorants Aggregation pheromone CO2 [SDV.SPEE]Life Sciences [q-bio]/Santé publique et épidémiologie Neuroscience |
| Zdroj: | Journal of Insect Physiology Journal of Insect Physiology, Elsevier, 2008, 54 (1343-1348), 10.1016/j.jinsphys.2008.07.004. ⟨10.1016/j.jinsphys.2008.07.004⟩ Journal of Insect Physiology, 2008, 54 (1343-1348), 10.1016/j.jinsphys.2008.07.004. ⟨10.1016/j.jinsphys.2008.07.004⟩ |
| ISSN: | 0022-1910 |
| DOI: | 10.1016/j.jinsphys.2008.07.004 |
| Popis: | International audience; It has been demonstrated in several insect species that a circadian clock makes the whole of antennal chemoreceptors more sensitive during a particular temporal window every day. This assessment raises the question about how insects exhibiting bimodal activity handle their sensitivity to odours which are relevant at different moments of the day. To shed some light on this problem, we studied in Rhodnius prolixus the daily dynamics of their responsiveness to CO2 (host-associated cue) and aggregation cues (refuge-associated), which are relevant at dusk and dawn, respectively. We analysed: (1) whether a temporal modulation of the responsiveness to odours does exist in R. prolixus, (2) if this modulation is a general one or it is specific for each type of volatile, and (3) if it is controlled by exogenous or endogenous mechanisms. We found that the responsiveness to CO2 only occurs at dusk and that to assembling odours is restricted to dawn. Experiments under free-running conditions revealed that only the responsiveness to CO2 is controlled by a circadian clock, but not that to assembling signals. Thus, by combining endogenous and exogenous mechanisms, sensitivities to different odours are adjusted according to their associated behavioural context and moment of the day. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect