Monoterpene metabolism in female mountain pine beetles, Dendroctonus ponderosae Hopkins, attacking ponderosa pine

Abdominal volatiles of female mountain pine beetles,Dendroctonus ponderosae Hopkins, fed in ponderosa pine,Pinus ponderosa Dougl. ex Laws, and in lodgepole pine,P. contorta var.latifolia Engelmann, were analyzed by gas chromatography and coupled gas chromatography-mass spectrometry and were found to...

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Bibliographic Details
Published in:Journal of chemical ecology 1987-06, Vol.13 (6), p.1455-1480
Main Authors: Pierce, H.D. Jr, Conn, J.E, Oehlschlager, A.C, Borden, J.H
Format: Article
Language:English
Subjects:
BIOCHEMICAL PATHWAYS
Biochemistry. Physiology. Immunology
Biological and medical sciences
COMPOSE VOLATIL
COMPUESTO VOLATIL
DENDROCTONUS
Fundamental and applied biological sciences. Psychology
Insecta
Invertebrates
METABOLISM
METABOLISME
METABOLISMO
MONOTERPENE
MONOTERPENES
MONOTERPENOS
OLEOR0422E
OLEORESINAS
OLEORESINS
Physiology. Development
PINUS CONTORTA
Pinus contorta latifolia
PINUS PONDEROSA
Scolytidae
VIA BIOQUIMICA DEL METABOLISMO
VOIE BIOCHIMIQUE DU METABOLISME
VOLATILE COMPOUNDS
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Summary:Abdominal volatiles of female mountain pine beetles,Dendroctonus ponderosae Hopkins, fed in ponderosa pine,Pinus ponderosa Dougl. ex Laws, and in lodgepole pine,P. contorta var.latifolia Engelmann, were analyzed by gas chromatography and coupled gas chromatography-mass spectrometry and were found to comprise host oleoresin components and beetle-produced alliylic alcohols, aldehydes, and ketones derived from host monoterpenes. Neitherexo- andendo-brevicomin nor frontalin were detected. Three metabolic pathways are proposed to account for the distribution of beetle-produced monoterpene alcohols. The first pathway involves hydroxylation of monoterpene substrates on allylic methyl groups which areE to a methylene or vinyl group. This oxidation pathway is indiscriminate with respect to substrate and probably functions to detoxify monoterpenes. A second pathway, which hydroxylates theendo-cyclic methyleneE to a vinyl methyl group of bicyclic monoterpenes to give almost exclusively thetrans alcohol, is hypothesized to be involved in pheromone production. A third detoxification pathway involves anti-Markovnikov addition of water to theexo-cyclic double bond of β-phellandrene to give predominantlytrans-2-p-menthen-7-ol.
ISSN:0098-0331
1573-1561
DOI:10.1007/BF01012291