Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
2841550 | Journal of Insect Physiology | 2007 | 8 Pages |
Abstract
The L1 contact-chemoreceptor sensillum on the maxillary palp of the spruce budworm larva Choristoneura fumiferana (Clem.) (Lepidoptera: Tortricidae) was examined electrophysiologically for its responses to stimulation by various pyranose and furanose sugars. The results were compared to those from previous work on the sugar-sensitive neuron of the LST sensillum on the galea. We show that the L1 contact-chemoreceptor sensillum contains one sugar-sensitive neuron with furanose but no pyranose sites. It has response characteristics that differ from those of the sugar-sensitive neuron in the LST. Behavioural 2-choice feeding experiments show that, even with both known sugar-sensitive neurons disabled, larvae can still discriminate between disks treated with either distilled water or α-d-glucose. We conclude that the epipharyngeal sensilla must thus also contain a sugar-sensitive neuron.
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Authors
V. Hock, P.J. Albert, M. Sandoval,