Tension wood and opposite wood in 21 tropical rain forest species : 1. Occurence and efficiency of the G-layer

Clair Bruno, Ruelle Julien, Beauchêne Jacques, Prévost Marie-Françoise, Fournier Meriem. 2006. Tension wood and opposite wood in 21 tropical rain forest species : 1. Occurence and efficiency of the G-layer. IAWA Journal, 27 (3) : 329-338.

https://doi.org/10.1163/22941932-90000158

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Résumé : 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.

Mots-clés Agrovoc : bois, forêt tropicale humide, bois tropical

Mots-clés géographiques Agrovoc : Guyane française, France

Classification Agris : K50 - Technologie des produits forestiers
K10 - Production forestière
F62 - Physiologie végétale - Croissance et développement

Champ stratégique Cirad : Hors axes (2005-2013)

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