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Intraspecific variability of monoterpene composition emitted by Quercus ilex leaves

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Intraspecific variation in the composition of monoterpenes emitted from Quercus ilex L. leaves was investigated in southern France by screening the emissions of 146 trees and by examining the effects of season, age, and crown position of leaves on the composition of emissions. All trees emitted the same blend of monoterpenes, mainly α-pinene, -pinene, sabinene, myrcene, and limonene but in distinctly different proportions. Of the surveyed trees, 71% emitted mainly pinenes (60–80%), 21% had higher proportions of limonene (30–80%), and 8% had higher proportions of myrcene (60–90%) in their emissions. For a given tree, the proportions were similar for leaves of different ages and different crown positions, and remained unchanged throughout different seasons.

La variation intra-spécifique de la composition des monoterpènes émis par les feuilles de Quercus ilex L. a été étudiée sur un échantillon de 146 individus dans le sud de la France. L'influence de l'âge des feuilles, de la saison et de la position au sein de la couronne a également été analysée. Tous les arbres émettaient un mélange de monoterpènes, principalement α-pinène, -pinène, sabinène, myrcène et limonène mais dans des proportions differentes. Parmi les arbres échantillonnés, 71% émettaient principalement des pinènes (60–80%), 21% du limonène (30–80%) et 8% du myrcène (60–90%). Pour un arbre donné, les proportions restaient stables quels que soient l'âge des feuilles et leur position dans la couronne. Elles demeuraient inchangées au cours des saisons.

Document Type: Research Article

Publication date: January 1, 2001

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  • Published since 1971, this monthly journal features articles, reviews, notes and commentaries on all aspects of forest science, including biometrics and mensuration, conservation, disturbance, ecology, economics, entomology, fire, genetics, management, operations, pathology, physiology, policy, remote sensing, social science, soil, silviculture, wildlife and wood science, contributed by internationally respected scientists. It also publishes special issues dedicated to a topic of current interest.
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