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Natural clonal variation of wood extractives in Populus tremuloides

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Analysis of the potential genetic variation in quaking aspen (Populus tremuloides Michx.) wood extractives was performed by sampling nine natural clones at breast height. Significant clonal differences were found not only in the levels of total acetone extractives but also in the levels of sterols–triterpenes, steryl esters–waxes, and triglycerides, all of which are known to contribute to pitch formation in pulping and papermaking. In addition, extractive compounds known to elicit toxic effects in aquatic organisms showed statistically significant differences between natural aspen clones. In some cases (e.g., flavonoids), these compounds formed a part of the defense system in the living tree and, thus, were affected in part by the presence of decayed wood.

La variabilité génétique dans les produits d'extraction du bois de peuplier faux-tremble (Populus tremuloides Michx.) a été analysée en échantillonnant neuf clones naturels à hauteur de poitrine. Des différences clonales significatives ont été observées dans les quantités totales des produits d'extraction à l'acétone mais aussi dans les quantités de stérols–triterpènes, de stéryles estérifiés–cires et de triglycérides, tous des composés reconnus pour contribuer à la formation de goudron lors de la fabrication de pâte et de papier. De plus, des produits d'extraction reconnus pour leur effet toxique chez les organismes aquatiques montraient des différences significatives entre les clones naturels de peuplier. Dans certains cas (p. ex. flavonoïdes), ces composés constituent une partie du système de défense chez les arbres vivants et sont par conséquent en partie influencés par la présence de bois carié.[Traduit par la Rédaction]

Document Type: Research Article

Publication date: 2002-07-01

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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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