| Title: | Dolichodial: a new aphid sex pheromone component? |
| Author(s): | Dewhirst SY; Birkett MA; Fitzgerald JD; Stewart-Jones A; Wadhams LJ; Woodcock CM; Hardie J; Pickett JA; |
| Address: | "Biological Chemistry Department, Rothamsted Research, Harpenden, Hertfordshire, AL5 2JQ, UK. Sarah.Dewhirst@BBSRC.ac.uk" |
| DOI: | 10.1007/s10886-008-9561-9 |
| ISSN/ISBN: | 0098-0331 (Print) 0098-0331 (Linking) |
| Abstract: | "The sex pheromones of many aphid species from the subfamily Aphididae comprise a mixture of the iridoids (cyclopentanoids) (1R,4aS,7S,7aR)-nepetalactol and (4aS,7S,7aR)-nepetalactone. In this paper, we investigate whether other chemicals, in addition to nepetalactol and nepetalactone, are released from Dysaphis plantaginea (rosy apple aphid) oviparae as part of their sex pheromone. Four compounds present in an air entrainment sample collected from D. plantaginea oviparae feeding on apple (Malus silvestris c.v. Braburn) elicited electrophysiological responses from male D. plantaginea. Active peaks were tentatively identified by gas chromatography (GC) coupled with mass spectrometry, with identification confirmed by peak enhancement with authentic compounds on GC columns of different polarities. The electroantennography-active chemicals were (1R,4aS,7S,7aR)-nepetalactol, (4aS,7S,7aR)-nepetalactone, (1S,2R,3S)-dolichodial, and phenylacetonitrile. (1S,2R,3S)-Dolichodial elicited a behavioral response from male D. plantaginea and naive-mated female parasitoids, Aphidius ervi. This is the first report of electrophysiological and behavioral responses from any aphid morph to (1S,2R,3S)-dolichodial. Whether or not (1S,2R,3S)-dolichodial is a third component of the aphid sex pheromone is discussed" |
| Keywords: | "Animals Aphids/*drug effects/physiology Bridged Bicyclo Compounds, Heterocyclic/metabolism Cyclopentane Monoterpenes Cyclopentanes/metabolism Electrophysiological Phenomena/drug effects Female Hymenoptera/drug effects/physiology Male Monoterpenes/*analysi;" |
| Notes: | "MedlineDewhirst, Sarah Y Birkett, Michael A Fitzgerald, Jean D Stewart-Jones, Alex Wadhams, Lester J Woodcock, Christine M Hardie, Jim Pickett, John A eng Biotechnology and Biological Sciences Research Council/United Kingdom Research Support, Non-U.S. Gov't 2008/11/22 J Chem Ecol. 2008 Dec; 34(12):1575-83. doi: 10.1007/s10886-008-9561-9. Epub 2008 Nov 21" |
