Le bois de tension. 1. Définition et distribution dans l'arbre

Abstract

Tension wood. 1. Derinition and distribution in the tree. The tension wood of arborescent dicotyledons differs from normal wood by its anatomical, chemical, physical and mechanical characteristics which give to it a specific behaviour. It represents for the plant an efficient mechanism allowing adaptation and harmonious development in its own environment. Beyond a certain proportion, the presence of this tissue becomes injurious for the quality of the material and a major defect in some species for the user. In its development interfer complex mechanisms able to perceive endogenous and exogenous stimuli acting on the cambial zone during the new cell differentiation and maturation. Its particular distribution in the plant induces a dissymetrical distribution of growth stresses capable to modify the orientation of different axes in space.