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- Title
Functional Characteristics of a Tiny but Specialized Olfactory System: Olfactory Receptor Neurons of Carrot Psyllids (Homoptera: Triozidae).
- Authors
Kristoffersen, Lina; Larsson, Mattias C.; Anderbrant, Olle
- Abstract
With only ∼50 olfactory receptor neurons (ORNs), the carrot psyllid Trioza apicalis (Homoptera: Psylloidea) may have the smallest olfactory system described in adult Neopteran insects. Using single sensillum recordings (SSR) and gas chromatograph–linked SSR, we characterized 4 olfactory sensilla forming a distinct morphological type, which together house ∼25% of all ORNs. We recorded responses to extracts and single constituents from Daucus carota ssp. sativus, from the conifers Picea abies, Pinus sylvestris, and Juniperus communis, as well as from male and female T. apicalis. Receptor neurons were highly selective; only 9 compounds in total elicited repeatable responses, and each neuron responded to at most 3 individual compounds. Chemical profiles of carrot and conifers showed significant overlap, with 4 out of 9 electrophysiologically active compounds occurring in more than one type of extract, but a carrot-specific compound elicited the most repeated responses. We identified 4 tentative neuron classes and found a rather high degree of neuronal redundancy, with 1 neuron class present in 3 and another present in all 4 of the sensilla, respectively.
- Subjects
OLFACTORY bulb; HOST plants; OLFACTORY receptors; TRIOZA apicalis; JUNIPERUS communis; PHEROMONES; GAS chromatography
- Publication
Chemical Senses, 2008, Vol 33, Issue 9, p759
- ISSN
0379-864X
- Publication type
Article
- DOI
10.1093/chemse/bjn034