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Chem. Senses 27: 45-48, 2002
© Oxford University Press 2002

Central Processing of Plant Volatiles in Agrotis ipsilon Males is Age-independent in Contrast to Sex Pheromone Processing

Birgit Greiner, Christophe Gadenne1 and Sylvia Anton

Department of Ecology, Lund University, Ecology Building, Sölvegatan 37, S-22362 Lund, Sweden 1 Institut National de la Recherche Agronomique, Unité Mixte de Recherches en Santé Végétale, Centre de Recherches de Bordeaux, BP 81, F-33883 Villenave d'Ornon Cedex, France

Correspondence to be sent to: Sylvia Anton, Swedish Agricultural University, Institute for Plant Sciences, Chemical Ecology, Box 44, 230 53 Alnarp, Sweden. e-mail: sylvia.anton{at}vv.slu.se

Male moths rely on female sex pheromones to find their mating partner and on plant volatiles for the detection of food sources. In the noctuid moth, Agrotis ipsilon, plasticity of central sex pheromone processing has been shown previously in the antennal lobe. The sensitivity of antennal lobe interneurons increases with age and juvenile hormone level. Here we investigated whether age affects not only central sex pheromone processing, but also central processing of plant volatiles in A. ipsilon males. Intracellular recordings of antennal lobe interneurons were made in males of different ages after stimulation of the antennae with seven different plant volatiles. The sensitivity and specificity of the antennal lobe interneurons for any of the plant volatiles tested did not change with age. From these results we conclude that the sensitivity of the antennal lobe interneurons involved in central plant volatile processing is age-independent and that the action of juvenile hormone is specific for central sex pheromone processing in A. ipsilon males.


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