NDLI: Vessel size and number are contributors to define wood density in cork oak

Content Provider	Springer Nature Link
Author	Leal, Sofia Sousa, Vicelina B. Knapic, Sofia Louzada, José Luís Pereira, Helena
Copyright Year	2011
Abstract	Cork oak (Quercus suber L.) has a dense wood that allows high-quality uses. In the present work, we study the influence of vessel characteristics, measured through image analysis and optical microscopy, on wood density, measured using X-ray microdensitometry, on 40-year-old trees. Vessel area increases with cambial age (5403–33064 μm2), while wood density decreases (1.229–0.836 g/cm3). The number of vessels is relatively constant at 6 vessels/mm2, while vessel proportion in cross-section increases from 3.3% near the pith to 20.5% near the bark. In growth rings closest to the pith, with high wood density and low vessel area, the relationship between the two variables is linear (R 2 = −32.1%, P < 0.01) but with increasing tree age and vessel size, the wood density remains rather constant, suggesting that decreases in density might compromise mechanical support of the tree at a stage when the increase in cross-sectional area alone might not provide mechanical stability. Other anatomical characteristics not considered in this study, like large xylem rays that increase with cambial age, may be responsible for the constant density.
Starting Page	1023
Ending Page	1029
Page Count	7
File Format	PDF
ISSN	16124669
Journal	Forstwissenschaftliches Centralblatt vereinigt mit Tharandter forstliches Jahrbuch
Volume Number	130
Issue Number	6
e-ISSN	16124677
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-02-12
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Wood density Wood anatomy Vessels Cork oak Quercus suber Plant Ecology Forestry Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Plant Science Forestry

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