title: The sense of smell in Odonata: an electrophysiological screening.
abstract: Volatile chemicals mediate a great range of intra- and interspecific signalling and information in insects. Olfaction has been widely investigated mostly in Neoptera while the knowledge of this sense in most basal insects such as Paleoptera (Odonata and Ephemeroptera) is still poor. In the present study we show the results of an electrophysiological screening on two model species, Libellula depressa (Libellulidae) and Ischnura elegans (Coenagrionidae), representatives of the two Odonata suborders Anisoptera and Zygoptera, with the aim to deep the knowledge on the sense of smell of this insect order. The antennal olfactory sensory neurons (OSNs) of these two species responded to the same 22 compounds (out of 48 chemicals belonging to different functional groups) encompassing mostly amines, carboxylic acids or aldehydes and belonging to green leaf volatiles, vertebrate related volatiles and volatiles emitted by standing waters bacteria. The properties of Odonata OSNs are very similar to those of ionotropic receptors (IRs) expressing OSNs in other insects.
authors.affiliation: Dipartimento di Chimica, Biologia e Biotecnologie, University of Perugia, Italy.
authors.forename: Silvana
authors.initials: S
authors.lastname: Piersanti
authors.affiliation: Dipartimento di Scienze Agrarie, Alimentari e Ambientali, University of Perugia, Italy.
authors.forename: Francesca
authors.initials: F
authors.lastname: Frati
authors.affiliation: Dipartimento di Scienze Agrarie, Alimentari e Ambientali, University of Perugia, Italy.
authors.forename: Eric
authors.initials: E
authors.lastname: Conti
authors.affiliation: Dipartimento di Chimica, Biologia e Biotecnologie, University of Perugia, Italy. Electronic address: manuela.rebora@unipg.it.
authors.forename: Manuela
authors.initials: M
authors.lastname: Rebora
authors.affiliation: Dipartimento di Scienze Agrarie, Alimentari e Ambientali, University of Perugia, Italy.
authors.forename: Gianandrea
authors.initials: G
authors.lastname: Salerno
mesh_terms: D000818:Animals; D057506:Arthropod Antennae / Q000502:physiology; D004594:Electrophysiology; D005260:Female; D008297:Male; D063191:Odonata / Q000502:physiology*; D009812:Odorants; D012903:Smell / Q000502:physiology*
keywords: Aquatic insects; Electrophysiology; Ischnura elegans; Libellula depressa; Odonata; Olfaction