Caracterización anatómica de la madera de cinco especies comerciales mediante tinciones procedentes del cantón Tena, provincia de Napo.

Abstract

This research proposes to characterize anatomically the wood of five commercial species through stains from Tena city-Napo province; where dendrological samples of each species under study were obtained. These were identified in the herbarium of the Higher Polytechnical School of Chimborazo, which correspond to Vochsysia bracelinieae, Jacaranda copaia, Vitex cymosa, Minquartia guianesis, and Guarea kunthiana. For the study of the macroscopic characteristics of the wood, specimens of 2 cm thick x 5 cm wide x 15 cm long were dimensioned; which were used to determine characteristics; such as: color between sapwood and heartwood, smell, taste, texture, grain, luster and veining while for the study of the microscopic characteristics. Cubes of 2 cm of the edge were used and were placed in containers duly sealed with aluminum foil and proceeded to its ablation in the Biobased brand autoclave. The time was based on the density of each species, then cuts of 0.3 microns were made, establishing three planes: transversal, tangential and radial. The samples obtained were placed in properly identified Petri dishes using distilled water to avoid dehydration. Subsequently, the sheets were immersed in Safranin 1% blue 1 to 1% and bright green 0.5% for 20 seconds. Once the plates were assembled, the appropriate observation was made in the microscope where the morphology, quantity, and size of the pores were visualized and the perimeter was measured. Afterward, the best dye was determined for the observation of the microscopic characteristics.

Key Words: STAINS- DENDROLOGICAL SAMPLES- MICROSCOPIC CHARACTERISTICS- MACROSCOPIC CHARACTERISTICS- COMMERCIAL TIMBERS