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Identification of olfactory receptor neurons in two Species of scarab beetles: a comparative study by means of single sensillum recording

Few studies have addressed how olfactory systems may be adapted to different odour environments. I have performed the largest study to date, comparing olfactory receptor neurons in the two congeneric species of scarab beetle, P. marginata and P. interrupta. Both species are fruit- and flower-eaters...

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Main Author: Khbaish, Hamida
Format: Second cycle, A2E
Language:Inglés
Inglés
Published: 2010
Subjects:
Pests of plants
Online Access:https://stud.epsilon.slu.se/1563/
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author Khbaish, Hamida
author_browse Khbaish, Hamida
author_facet Khbaish, Hamida
author_sort Khbaish, Hamida
collection Epsilon Archive for Student Projects
description Few studies have addressed how olfactory systems may be adapted to different odour environments. I have performed the largest study to date, comparing olfactory receptor neurons in the two congeneric species of scarab beetle, P. marginata and P. interrupta. Both species are fruit- and flower-eaters but geographically separated (equatorial versus sub-Saharan Africa, resp.). They have similar lamellate antennae covered mostly with numerous olfactory sensilla placodea (plate sensilla) and a lesser number of other types, mainly sensilla coeloconica (grooved peg), and smooth peg sensilla of unknown function. By means of single sensillum recordings with tungsten microelectrodes I screened a great number of olfactory sensilla with a large array of odorants. I compared 456 sensilla placodea, containing 212 responding cells, over the whole antennae in both species. The olfactory systems of these two species displayed an amazing degree of conservation, with 20 identified olfactory neuron classes, all except two of which were found in both species with no detectable difference in response profiles. The exceptions were two olfactory receptor neuron classes: methyl benzoate and gamma-nonalactone, which were only found in Pachnoda marginata. In general, the two species showed an almost total overlap in their receptor neuron assemblies. One aim of the study was also to test whether the arrangement of neurons within sensilla was conserved between the species, but this could not be tested as very few combinations of characterized neurons were encountered during the study.
format Second cycle, A2E
id RepoSLU1563
institution Swedish University of Agricultural Sciences
language Inglés
Inglés
publishDate 2010
publishDateSort 2010
record_format eprints
spelling RepoSLU15632012-04-20T14:14:43Z https://stud.epsilon.slu.se/1563/ Identification of olfactory receptor neurons in two Species of scarab beetles: a comparative study by means of single sensillum recording Khbaish, Hamida Pests of plants Few studies have addressed how olfactory systems may be adapted to different odour environments. I have performed the largest study to date, comparing olfactory receptor neurons in the two congeneric species of scarab beetle, P. marginata and P. interrupta. Both species are fruit- and flower-eaters but geographically separated (equatorial versus sub-Saharan Africa, resp.). They have similar lamellate antennae covered mostly with numerous olfactory sensilla placodea (plate sensilla) and a lesser number of other types, mainly sensilla coeloconica (grooved peg), and smooth peg sensilla of unknown function. By means of single sensillum recordings with tungsten microelectrodes I screened a great number of olfactory sensilla with a large array of odorants. I compared 456 sensilla placodea, containing 212 responding cells, over the whole antennae in both species. The olfactory systems of these two species displayed an amazing degree of conservation, with 20 identified olfactory neuron classes, all except two of which were found in both species with no detectable difference in response profiles. The exceptions were two olfactory receptor neuron classes: methyl benzoate and gamma-nonalactone, which were only found in Pachnoda marginata. In general, the two species showed an almost total overlap in their receptor neuron assemblies. One aim of the study was also to test whether the arrangement of neurons within sensilla was conserved between the species, but this could not be tested as very few combinations of characterized neurons were encountered during the study. 2010-07-06 Second cycle, A2E NonPeerReviewed application/pdf eng https://stud.epsilon.slu.se/1563/1/khbaish_h_100706.pdf Khbaish, Hamida, 2010. Identification of olfactory receptor neurons in two Species of scarab beetles: a comparative study by means of single sensillum recording. Second cycle, A2E. Alnarp: (LTJ, LTV) > Dept. of Plant Protection Biology <https://stud.epsilon.slu.se/view/divisions/4809.html> urn:nbn:se:slu:epsilon-4-280 eng
spellingShingle Pests of plants
Khbaish, Hamida
Identification of olfactory receptor neurons in two Species of scarab beetles: a comparative study by means of single sensillum recording
title Identification of olfactory receptor neurons in two Species of scarab beetles: a comparative study by means of single sensillum recording
title_full Identification of olfactory receptor neurons in two Species of scarab beetles: a comparative study by means of single sensillum recording
title_fullStr Identification of olfactory receptor neurons in two Species of scarab beetles: a comparative study by means of single sensillum recording
title_full_unstemmed Identification of olfactory receptor neurons in two Species of scarab beetles: a comparative study by means of single sensillum recording
title_short Identification of olfactory receptor neurons in two Species of scarab beetles: a comparative study by means of single sensillum recording
title_sort identification of olfactory receptor neurons in two species of scarab beetles: a comparative study by means of single sensillum recording
topic Pests of plants
url https://stud.epsilon.slu.se/1563/
https://stud.epsilon.slu.se/1563/

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