Resumen

GIMENEZ, A. M et al. Ziziphus mistol Griseb (Rhamnaceae) wood anatomy: Sapwood/heartwood relatio. Quebracho (Santiago del Estero) [online]. 2014, vol.22, n.1, pp.6-16. ISSN 1851-3026.

The objective of this work was to characterize the wood of Ziziphus mistol Griseb. and set relationships between its sapwood and heartwood. Fifteen trees were randomly selected and felled. The samples were obtained at 1,3 m above ground (DBH). The nomenclature by the IAWA Committee and Tortorelli were adopted. Both the tree ring counting and measuring were performed with the ANIOL Computer Equipment and the CATRAS software. The sapwood/heartwood relationship was analyzed in terms of age. The flame and coloring methods were applied for differentiating sapwood/heartwood. The following anatomical features were used to characterize the wood: diffuse porosity, predominantly isolated, small, quite numerous vessels having alternate intervascular pits, heterogeneous, 1-3 rays seriate, aliform, vessel-centric paratracheal parenchyma, in narrow bands. The sapwood thickness accounts for 75% of the trunk diameter, in an 80 year range, that increases with age up to 35 rings remaining constant afterwards. The heartwood shows gummy-substances caused total vessel obstruction.

Palabras clave : Wood; Anatomy; Mistol; Heartwood; Sapwood.

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