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Extractives and natural durability of teak wood from Mexican plantations
Currently there is increasing interest in Mexico to grow teak and intense research in its wood due to its recognized natural durability combined with mechanical resistance to loading, which have made it attractive for use in many sectors. Knowing very limited studies on teak wood in the country, this study aims at determining the proportion of heartwood (HW) for each age and source through evaluation of the quantity and type of extractives and the natural durability of the HW obtained from three localities of the Southeast Mexico. It is found that percentage of HW formed from teakwood is within the ranges reported elsewhere for teak trees of similar ages; increasing tendency of this while the height of the shaft really increased with aging of trees; lower topochemical absorption values of the inner part of the HW compared to those of the external part; no clear trend about the role of age and origin of teak wood with respect to the number of extracts accumulated in the HW; abundant presence of tectoquinones irrespective of age and province of the trees and finally, highly resistant to attack by two rotting fungi regardless of age or provenance.