Descripción histomorfológica de los organos vegetativos de Tillandsia fendleri, familia Bromeliaceae presente en un sendero del Parque Natural Chicaque

Abstract

The present study corresponds to a descriptive investigation which had as objective to describe histologically the vegetative organs like leaf, stem and root of Tillandsia fendleri, Griseb, species belonging to the family Bromeliaceae, present in a Path of the Natural Park girl located at the southwest of the savannah of Bogotá, municipality of San Antonio del Tequendama. This research was carried out in 2 phases: The first corresponds to a field phase in which the Transect Pico de Águila was located for the collection of the specimen inside the park. Subsequently, the identification of the specimen was carried out by means of dichotomous keys of different authors, in situ cuts of the vegetative organs of the plant were made (leaf, stem and root) and they were preserved in FAA for their later study in laboratory. In the second phase, of laboratory, histological cuts were performed freehand of the middle section of the leaf, stem and root, which were stained with safranin and methylene blue according to the methodology proposed by Johansen (1940). These cuts were mounted with glycerin gelatine in order to characterize the tissues of the aforementioned organs of T. Fendleri and as support material for further studies. As a result was obtained: epidermis of the leaf composed of cells pahaired only by the face axial; Trichomes Peltados (family property) on both sides; Ciclocítico type stomata. Leaf vascular beams of closed collateral type, aerenchyma surrounding the beams with cells of long arms and with presence of chloroplasts. At the stem level, cortical parenchyma was obtained with Colénquima Lagunoso immersed, open collateral type, with the presence of rafidios and starch granules. Velamen Root, multistoried exodermis with thick-walled cells, cortex with annular Colénquima and aerenchyma in a discontinuous ring. The presence of velamen not so developed shows a disposition of epiphytos traits.