Olfactory coding in the perception of semiochemicals |
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Authors: | J. H. Visser R. de Jong |
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Affiliation: | (1) Department of Entomology, Wageningen Agricultural University, P.O. Box 8031, 6700 EH Wageningen, The Netherlands;(2) Present address: Research Institute for Plant Protection, P.O. Box 9060, 6700 GW Wageningen, The Netherlands |
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Abstract: | Information processing in the olfactory pathway underlying the perception of semiochemicals by insects is discussed. Both the chemical message for mates and the message for food consist of blends of chemicals. Olfactory receptors in an insect species are tuned to the detection of those compounds which comprise such chemical messages for that species. The classification of receptors as specialists or generalists coincides with two concepts of information processing, i.e., labeled lines and across-fiber patterns, respectively. The olfactory code coming from antennal receptors inPieris brassicae larvae is a combination of labeled lines and across-fiber patterning. When antennae of adult Colorado potato beetles,Leptinotarsa decemlineata, are stimulated by binary mixtures of leaf odor components, the pattern of neural activities in the olfactory receptors shows some separation into two channels, quantitative versus qualitative detection. The separation is complete in the antennal lobe of this beetle.Presented at the Symposium on Insect Chemical Communications: Unifying Concepts. ACS 194th National Meeting, New Orleans, Louisiana, August 31, 1987. |
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Keywords: | Colorado potato beetle Leptinotarsa decemlineata Coleoptera Chrysomelidae Pieris brassicae Lepidoptera Pieridae olfactory coding information processing olfactory receptors antennal lobe response profiles stimulus mixtures pheromones host plant odor semiochemicals |
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