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Heartwood formation in living stumps of Douglas-fir
Wood Science and Technology, 1970An anatomical and chemical examination was made of living stumps of Douglas-fir. Changes in heartwood and extractives formation are not significant under the conditions of severe physiological stress that existed unless cell morphology was also altered.
R. W. Hemingway, W. E. Hillis
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Formation of Earlywood, Latewood, and Heartwood
1997A clear periodicity in light and dark color is observed on the cross surface of trees grown in temperate and warm-temperate zones, especially conifers. Each period corresponds to a growing ring (an annual ring in temperate and warm-temperate zones). The light and dark colors are ascribed to the different cells formed in the earlier and the later parts ...
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The Formation of Heartwood and Its Extractives
1999During evolution, trees developed several defense systems to maintain long term existence. One of these was the development of durable heartwood, now known to be due to the extractives present. The term “extractives” used in this chapter covers a large number of organic compounds of different classes which can be extracted from wood or bark with polar ...
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Is oxygen involved in beech (Fagus sylvatica) red heartwood formation?
Trees, 2007European beech (Fagus sylvatica) facultatively develops red heartwood, which decreases the value of its timber and is difficult to predict in standing trees. According to current theory, the absence of oxygen prevents discolouration in the wood of uninjured trees, and red heartwood forms when oxygen enters the stem through injuries.
Johannes Sorz, Peter Hietz
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On the formation of facultatively colored heartwood in Beilschmiedia tawa
Wood Science and Technology, 1968The microscopic investigation in navashin-fixed material of Beilschmiedia tawa has shown that this species is a typical example of a tree with facultatively colored heartwood. Microtechnological measurements, as for instance of the shrinkage or the sorption or other features, have been proved suitable to determine whether or not the heartwood ...
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Function, Formation and Control of Heartwood and Extractives
1987The events of plant cell division and cell enlargement have received much attention. On the other hand, the changes during maturation as well as the onset of cellular senescence, which are less easily observed, have received comparatively little attention.
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Wood anatomy and heartwood formation in Neem (Azadirachta indica A. Juss.)
Botanical Journal of the Linnean Society, 1988The wood of Azadirachta indica is diffuse porous. Axial parenchyma is paratracheal banded or vasicentric. Rays are uniseriate to multiseriate and heterocellular with procumbent and upright cells. There is a strong negative correlation between vessel member length and diameter.
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Tree Physiology
Abstract Dalbergia odorifera T. Chen, an economically and medicinally valuable tree, suffers from heartwood shortage due to slow natural formation. Ethylene has emerged as a potent inducer of heartwood formation in D. odorifera, but long-term evidence and mechanisms remain unclear.
Houzhen Hu +9 more
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Abstract Dalbergia odorifera T. Chen, an economically and medicinally valuable tree, suffers from heartwood shortage due to slow natural formation. Ethylene has emerged as a potent inducer of heartwood formation in D. odorifera, but long-term evidence and mechanisms remain unclear.
Houzhen Hu +9 more
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Physiology of Cambial Growth, Storage of Reserves and Heartwood Formation
2001Wood constitutes a renewable bio-product of huge ecological and economical value. Within axes of trees, wood formation starts during cambial growth and inwards produced cells which differentiate and mature during the first growing season forming functional units.
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