Results 21 to 30 of about 5,539,134 (182)
Identification of Three Monofunctional Diterpene Synthases with Specific Enzyme Activities Expressed during Heartwood Formation in Western Redcedar (Thuja plicata) Trees. [PDF]
Plants (Basel), 2020 Upon harvest, Western redcedar (WRC; Thuja plicata) trees have a high incidence and extent of heartwood rot. While monoterpenoids and lignans have been linked to rot resistance in this species, other specialized metabolites, such as diterpenes, are ...
Tasnim S, Gries R, Mattsson J.
europepmc +2 more sources
Chemistry of Heartwood Formation
Mokuzai Gakkai Shi, 2012 樹木が10年程の齢に達すると，幹や枝などにおいてその中心部から心材が形成される。心材の特性が色調・におい・耐久性など木材の諸性質を左右するといった木材利用上の興味に加え，樹木が心材を形成する意義の理解ならびに心材形成の機構の解明といった植物基礎科学的な興味が，長い間研究者を心材研究・心材形成研究へと向かわせてきた。心材形成は生物学的・化学的・物理学的変化を伴う複雑な樹木生理現象である。中でも化学的な変化となる，心材に特有な物質すなわち心材成分の新生・堆積は，これら化合物自体が色・におい・対生物活性を持つことが多いため，直接的に心材特性の発現に結び付けられ得る，心材形成時の最も顕著な変化現象と言えよう。本総説では心材形成について，主に「心材成分の堆積」に着眼して生理学的見地，生化学的見地，組織（化 ...
Takanori Imai
exaly +3 more sources
Effects of pruning on heartwood formation in Scots pine trees [PDF]
Journal of Forest Science, 2004 The object of this study was to investigate the effect of pruning on heartwood formation in mature Scots pine (Pinus sylvestris L.) trees. Fifty trees were treated by three different intensive pruning regimes: 42, 60 and 70 percentage of defoliation ...
B. Bergström, R. Gref, A. Ericsson
doaj +2 more sources
ForestsA sapwood tree is a species in which the sapwood does not differ significantly from the heartwood and cannot be classified by shades of color. It is generally accepted that heartwood has a higher economic value than sapwood, but most of the studies ...
Shixiang Chen +2 more
exaly +2 more sources
Cell death of long-lived ray parenchyma cells during heartwood formation in trees
Journal of Wood ScienceCell death plays an important role in the determination of secondary xylem cell functions. Tracheary elements (TEs), such as vessel elements and tracheids, lose their organelles due to rapid autolysis after the completion of secondary wall thickening and
Satoshi Nakaba, Ryo Funada
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Metsanduslikud Uurimused, 2022 We investigated the distribution of extractive, phenolic, and polysaccharides content of young S. mahagoni trees aged 1 to 5 years. The wood powder materials in two vertical positions (bottom and top) were successively extracted using n-hexane, methanol,
Arisandi Rizki +3 more
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A Review: The Soluble Sugars Involved in The Process of Heartwood Formation
Wood Research JournalThis study aims to examine the soluble sugars involved in the process of heartwood formation using 87 journal articles and non-articles. The data used was collected through an online search with 5 keywords, namely “heartwood formation”, “reserve material
Rizki Arisandi
semanticscholar +2 more sources
Positional differences in the micro- and ultra-structural variations of ray parenchyma cells during the transformation from sapwood to heartwood [PDF]
Frontiers in Plant ScienceRay parenchyma cells are involved in the initiation of heartwood formation. The position within a ray influences the timing of ray parenchyma cell differentiation and function; however, there is little information concerning the positional influence on ...
Lijuan Yin +8 more
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BOIS & FORETS DES TROPIQUES, 2018 The aim of this study was to establish variations in heartwood (percentage, diameter, radius, volume) in relation to tree height and sapwood thickness. The age at which heartwood formation begins and the maximum heartwood height in Tectona grandis trees ...
D. Fernández-Sólis +2 more
semanticscholar +3 more sources
BMC Plant BiologyAcacia melanoxylon is well known as a valuable commercial tree species owing to its high-quality heartwood (HW) products. However, the metabolism and regulatory mechanism of heartwood during wood development remain largely unclear.
Ruping Zhang +6 more
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