Tension wood and opposite wood in 21 tropical rain forest species : 1. Occurence and efficiency of the G-layer
TLDR
Wood samples were taken from the upper and lower sides of 21 naturally tilted trees from 18 families of angiosperms in the tropical rain forest in French Guyana and showed that the G-layer is not a key factor in the production of high tensile stressed wood.Abstract:
SUMMARY Wood samples were taken from the upper and lower sides of 21 naturally tilted trees from 18 families of angiosperms in the tropical rain forest in French Guyana. The measurement of growth stresses ensured that the two samples were taken from wood tissues in a different mechanical state: highly tensile stressed wood on the upper side, called tension wood, and lower tensile stressed wood on the lower side, called opposite wood. Eight species had tension wood fibres with a distinct gelatinous layer (G-layer). The distribution of gelatinous fibres varied from species to species. One of the species, Casearia javitensis (Flacourtiaceae), showed a peculiar multilayered secondary wall in its reaction wood. Comparison between the stress level and the occurrence of the G-layer indicates that the G-layer is not a key factor in the production of high tensile stressed wood.read more
Citations
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Plant Hormones in Wood Formation -Novel Insights into the Roles of Ethylene and Gibberellins
TL;DR: Bjorklund et al. as mentioned in this paper used a reverse genetics approach to conclusively establish the role of endogenous ethylene in wood formation, using Populus tremula x tremuloides.
Journal ArticleDOI
Anatomical, chemical, and physical characteristics of tension wood in two tropical fast-growing species, Falcataria moluccana and Acacia auriculiformis
Haruna Aiso,Haruna Aiso,Futoshi Ishiguri,Tatsuya Toyoizumi,Jyunichi Ohshima,Kazuya Iizuka,Dody Priadi,Shinso Yokota +7 more
TL;DR: The anatomical, chemical, and physical characteristics of tension wood were investigated in the commercially important tropical fast growing plantation species Falcataria moluccana and Acacia auriculi as mentioned in this paper.
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Strain distribution, growth eccentricity, and tension wood distribution in the plagiotropic and orthotropic branches of Koelreuteria henryi Dummer
TL;DR: Investigation of the development of growth strains, distribution of tension wood, and eccentricity on the branchwood of Koelreuteria henryi revealed the unusual distribution of released growth strain and tension wood as well as growth eccentricity.
Journal ArticleDOI
Ethylene and its interaction with other hormones in tension wood formation in Leucaena leucocephala (Lam.) de Wit
S. Pramod,Priti Patel,K. S. Rao +2 more
TL;DR: In this paper, the effect of exogenous ethephon and its combination with gibberellic acid (GA3), indole-3-acetic acid (IAA), and benzyl amino purine (BAP) on tension wood formation in the vertically growing shoots of Leucaena leucocephala has been studied using light and scanning electron microscopy (SEM).
Dissertation
Contribution à l’étude du rôle des xylanes et des xyloglucanes fucosylés au cours de la formation du bois : application à la formation du bois de tension chez le peuplier
TL;DR: In this article, a new architecture of the xylogenese paroi has been observed, sous les effets de contraintes environnementales (vent, pente), a nouvelle architecture of cette paroi est observee, which va influer directement sur les proprietes mecaniques and la qualite du bois.
References
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Growth Stresses and Strains in Trees
TL;DR: In this article, the authors present a more quantitative approach to the effect of growth stresses than might have been the case in the past, by taking a more qualitative approach to evaluate the relationship between growth stress and wood properties.
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Significance of allometry in tropical saplings.
Takashi Kohyama,M. Motta +1 more
TL;DR: It is hypothesize that the advantage of maintaining assimilative area in present height is diminished in a habitat with higher growth rate and/or steeper vertical light gradient such as in.
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Physical and Chemical Properties of the Gelatinous Layer in Tension Wood Fibres of Aspen (Populus tremula L.)
Per Henrik Norberg,Hans Meier +1 more
TL;DR: In this article, different organic solvents were passed through green cylindric samples of sapwood of Abies alba Miller and Picea abies Karst, at a pressure equal to 5 cm water column.
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Detection in situ and characterization of lignin in the G -layer of tension wood fibres of Populus deltoides
TL;DR: Immunochemical labelling provides the first visualization in planta of lignin structures within the G-layer of tension wood fibres, and patterns of distribution of syringyl epitopes indicate thatSyringyl lignIn is deposited more intensely in the later phase of fibre secondary wall assembly, and is under specific spatial and temporal regulation targeted differentially throughout cell wall layers.