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Gibberellin-induced formation of tension wood in angiosperm trees
Planta, 2008After gibberellin had been applied to the vertical stems of four species of angiosperm trees for approximately 2 months, we observed eccentric radial growth that was due to the enhanced growth rings on the sides of stems to which gibberellin had been applied. Moreover, the application of gibberellin resulted in the formation of wood fibers in which the
Ryo, Funada +6 more
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TENSION WOOD-LIKE REACTION WOOD IN VESSEL-LESS TETRACENTRON SINENSE
IAWA Journal, 2016The objective of this study is to clarify the anatomical characteristics and lignin distribution of reaction wood in a vessel-less angiosperm species, Tetracentron sinense Oliv. Sample disks (1 cm in thickness) were collected from three different positions of a Tetracentron sinense tree.
H. Aiso +3 more
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Reaction wood drying kinetics: tension wood in Fagus sylvatica and compression wood in Picea abies
Wood Science and Technology, 2008The drying kinetics of reaction woods in Picea abies (compression wood) and Fagus sylvatica (tension wood) in comparison with their corresponding normal woods was investigated under constant convective drying conditions. Moisture profiles along the thickness of small flat-sawn boards taken from reaction and opposite wood zones were evaluated using a ...
A. Tarmian +4 more
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Phytochemistry, 2009
In stems of woody angiosperms responding to mechanical stress, imposed for instance by tilting the stem or formation of a branch, tension wood (TW) forms above the affected part, while anatomically distinct opposite wood (OW) forms below it. In poplar TW the S3 layer of the secondary walls is substituted by a "gelatinous layer" that is almost entirely ...
Decou, Raphael +7 more
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In stems of woody angiosperms responding to mechanical stress, imposed for instance by tilting the stem or formation of a branch, tension wood (TW) forms above the affected part, while anatomically distinct opposite wood (OW) forms below it. In poplar TW the S3 layer of the secondary walls is substituted by a "gelatinous layer" that is almost entirely ...
Decou, Raphael +7 more
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Tension Test Methods for Wood, Wood-Base Materials, and Sandwich Constructions
1957The need for more efficient use of wood and wood-base products as engineering materials has led to a renewed interest in and need for data on basic strength properties. Of growing importance, therefore, is the tensile strength of wood, veneer, plywood, fiberboard, and paper.
L. J. Markwardt, W. G. Youngquist
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Chlorazol Black E as a Stain for Tension Wood
Stain Technology, 1964Sections containing gelatinous fibers were cut at 15 μ from material both fixed and stored in formalin-acetic-alcohol, 5:5:90 (of 70%). These sections were stained 5 min in a 1% aqueous solution of lignin pink (G. T. Gurr), differentiated quickly in water, soaked 5 min in 95% ethyl alcohol, dehydrated in absolute ethyl alcohol and counter stained 5 min
A. W. Robards, Marion J. Purvis
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Gene expression in tension wood and bast fibres
Russian Journal of Plant Physiology, 2010Tension wood is produced in the xylem of some angiosperm trees, such as poplar (Populus spp.), whereas bast fibers are phloem-derived cells best known from annual crops, such as flax (Linum usitatissimum L.). Despite their different origins, secondary walls of both tension wood and bast fibers share distinctive properties, including an abundance of ...
N. Hobson, M. J. Roach, M. K. Deyholos
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Is hygrothermal recovery of tension wood temperature-dependent?
Wood Science and Technology, 2016When a green wood specimen is hygrothermally treated, it often shows dimensional changes in the longitudinal and transversal directions, which is called hygrothermal recovery of wood. Hygrothermal recovery of tension wood is assumed to be behind the unusual contraction of gelatinous layer along the longitudinal axis.
K. C. Sujan +7 more
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Microfibril Angle Distribution of Poplar Tension Wood
IAWA Journal, 2012Tension wood of poplar (Populus nigra) branches was studied by lightand electron microscopy. The characteristic features of tension wood such as wider growth rings, reduced vessel density and higher gross density were confirmed by our results. Based on a novel combination of transmission electron microscopy (TEM) imaging and image analysis, involving ...
Silke Lautner +2 more
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Ethylene and tension wood formation in Eucalyptus gomphocephala
Wood Science and Technology, 1978Eucalyptus gomphocephala A.DC seedlings grown horizontally for 103 days had less terminal shoot elongation and higher internal and emanated ethylene levels in the basal portion of the stem than seedlings grown vertically under otherwise identical conditions. Horizontal seedlings had greater radial growth in the upper stem half than in the lower half of
N. D. Nelson, W. E. Hillis
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