Electrophysiological and behavioral responses of Spodoptera littoralis caterpillars to attractive and repellent plant volatiles
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چکیده
*Correspondence: Emmanuelle Jacquin-Joly, Institut National de la Recherche Agronomique, UMR iEES-Paris, route de Saint Cyr, 78026 Versailles Cedex, France e-mail: emmanuelle.jacquin@ versailles.inra.fr; Frédéric Marion-Poll, LEGS UPR 9034, CNRS, avenue de la Terrasse, 91198 Gif-sur-Yvette, France e-mail: frederic.marion-poll@ agroparistech.fr †Present address: Kacem Rharrabe, Laboratoire Polydisciplinaire, Faculté Polydisciplinaire de Larache, Université Abdelmalek Essaâdi, Larache, Maroc; Frédéric Marion-Poll, Laboratoire Evolution, Génomes et Spéciation, UPR 9034, CNRS, Gif sur Yvette, France In Lepidoptera, the behavior of caterpillars to plant odors is poorly known. However, caterpillars are equipped with a reduced number of olfactory sensilla (3 on the antenna and 4–5 on the maxillary palps) which they can use to make fine discrimination between complex plant odors. In this work, we characterized behavioral responses of Spodoptera littoralis larvae to 11 odorants found in plants using binary choices in a Petri dish assay. In this assay, 1-hexanol, hexanal and cis-jasmone elicited a dose-dependent attraction, camphene and eugenol were repellent, while the response to other odorants were less marked. We recorded the electrophysiological responses to 5 of these odors from olfactory neurons of sensillum B2 of the antenna. Several neurons from this sensillum responded to each of the chemicals tested by an increase of their firing activity on top of a high background activity, suggesting that olfactory neurons of caterpillars is broadly tuned to a range of odorants rather than being specialized to a few molecules.
منابع مشابه
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تاریخ انتشار 2014