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Molecular receptive ranges of olfactory receptor neurones responding selectively to terpenoids, aliphatic green leaf volatiles and aromatic compounds, in the strawberry blossom weevil Anthonomus rubi
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
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2005 (English)In: Chemoecology, ISSN 0937-7409, E-ISSN 1423-0445, Vol. 15, no 4, 211-226 p.Article in journal (Refereed) Published
Abstract [en]

An important question in insect-plant interactions is which of the numerous plant compounds contribute to the perception of odour qualities in herbivorous insects and are likely to be used as cues in host-searching behaviour. In order to identify which plant-produced volatiles the strawberry blossom weevil Anthonomus rubi detects, we have used electrophysiological recordings from single olfactory neurones linked to gas chromatography and mass spectrometry. We here present 15 receptor neurone types specialised for naturally produced compounds present in the host and nonhost plants and two types for two aggregation pheromone components. The active compounds were terpenoids, aromatic and aliphatic esters, alcohols and aldehydes, some of which are induced by feeding activity of the weevils. The neurones were characterised by a strong response to one or two primary odorants and weaker responses to a few others having similar chemical structure. With one exception, the molecular receptive range of each neurone type was within one chemical group. Enantiomers of linalool separated on a chiral column activated two neurone types with different enantioselectivity. Inhibition by linalool of another neurone type, excited by alpha-pinene, indicated an additional mechanism for coding the information about this compound. Altogether, detection of 54 compounds by olfactory receptor neurones is shown, of which 40 have been chemically identified in this study. Thus A. rubi has the ability to detect a large number of odorants that may be used in host selection behaviour.

Place, publisher, year, edition, pages
2005. Vol. 15, no 4, 211-226 p.
Keyword [en]
GC-SCR, GC-MS, primary odorants, induced plant compounds, linalool enantiomers, Anthonomus rubi, Coleoptera, Curculionidae, host-plant volatiles, moth heliothis-virescens, gas-chromatography, hylobius-abietis, sex-pheromone, germacrene d, pine weevil, aggregation pheromone, drosophila-antenna, coleoptera
Identifiers
URN: urn:nbn:se:kth:diva-15196DOI: 10.1007/s00049-005-0315-7ISI: 000233498400004Scopus ID: 2-s2.0-28144458391OAI: oai:DiVA.org:kth-15196DiVA: diva2:333237
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2017-12-12Bibliographically approved

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