Discrepancy between antennal and behavioural responses for enantiomers of -pinene: electrophysiology and behavior of Helicoverpa armigera (Lepidoptera)

Hull, C. D., Cunningham, J. P., Moore, C. J., Zalucki, M. P. and Cribb, B. W. (2004) Discrepancy between antennal and behavioural responses for enantiomers of -pinene: electrophysiology and behavior of Helicoverpa armigera (Lepidoptera). Journal of Chemical Ecology, 30 10: 2071-2084. doi:10.1023/B:JOEC.0000045596.13384.7e


Author Hull, C. D.
Cunningham, J. P.
Moore, C. J.
Zalucki, M. P.
Cribb, B. W.
Title Discrepancy between antennal and behavioural responses for enantiomers of -pinene: electrophysiology and behavior of Helicoverpa armigera (Lepidoptera)
Journal name Journal of Chemical Ecology   Check publisher's open access policy
ISSN 0098-0331
Publication date 2004-10-01
Year available 2004
Sub-type Article (original research)
DOI 10.1023/B:JOEC.0000045596.13384.7e
Open Access Status
Volume 30
Issue 10
Start page 2071
End page 2084
Total pages 14
Editor J. T. Romeo
Place of publication New York
Publisher Kluwer Academic
Language eng
Subject C1
300204 Plant Protection (Pests, Diseases and Weeds)
770804 Control of pests and exotic species
Abstract The ability of adult cotton bollworm, Helicoverpa armigera (Hubner), to distinguish and respond to enantiomers of alpha-pinene was investigated with electrophysiological and behavioral methods. Electroantennogram recordings using mixtures of the enantiomers at saturating dose levels, and single unit electrophysiology, indicated that the two forms were detected by the same receptor neurons. The relative size of the electroantennogram response was higher for the (-) compared to the (+) form, indicating greater affinity for the (-) form at the level of the dendrites. Behavioral assays investigated the ability of moths to discriminate between, and respond to the (+) and (-) forms of alpha-pinene. Moths with no odor conditioning showed an innate preference for (+)-alpha-pinene. This preference displayed by naive moths was not significantly different from the preferences of moths conditioned on (+)-alpha-pinene. However, we found a significant difference in preference between moths conditioned on the (-) enantiomer compared to naive moths and moths conditioned on (+)-alpha-pinene, showing that learning plays an important role in the behavioral response. Moths are less able to distinguish between enantiomers of alpha-pinene than different odors (e.g., phenylacetaldehyde versus (-)-alpha-pinene) in learning experiments. The relevance of receptor discrimination of enantiomers and learning ability of the moths in host plant choice is discussed.
Keyword Biochemistry & Molecular Biology
Ecology
Heliothis
Eag
Electrophysiology
Alpha-pinene
Learning
Preference
Cotton Bollworm
Moth
Receptor Neuron Discrimination
Moth Heliothis-virescens
Queensland Fruit-fly
Hubner Lepidoptera
Bactrocera-tryoni
Noctuidae Moths
L Kairomone
Identification
Oviposition
Olfaction
Q-Index Code C1
Institutional Status UQ

 
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Created: Wed, 15 Aug 2007, 13:41:21 EST