Estudio exomorfológico y anatómico de las inflorescencias de las especies Austroamericanas del género Nothofagus BL. (Fagaceae)

• Autores: Picca, Pablo Ignacio
• Año de publicación: 1998
• Idioma: español castellano
• Tipo de recurso: tesis doctoral
• Colaborador/a o director/a de tesis: Palacios, Ramón Antonio
• Materia: FAGACEAE; NOTHOFAGUS; CUPULES; INFLORESCENCES; MORPHOLOGY; ANATOMY
• Institución: Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales

The pistillate inflorescence of Fagaceae is surrounded and protected by a structure uniquewithin the angiosperms: the cupule. Since last century, the lack of homologies, even amongthe groups more closer related to this family, has given place to a morphological approachto this structure. Historically, the small, inmature cupules and the related pistillate inflorescences have beenfocused on the mature, lignified and more conspicuous cupules and on the fruits protectedby this kind of structures. In the present research work, it has been studied the external morphology of the staminateinflorescences and of the inmature cupules of the southamerican species of Nothofagus B1. (Fagaceae). It has also been studied the inner vascular pattern of the cupule’s valves. The purpose of this research is to get a better comprehension of the morphological natureof such interesting and enigmatic structure. An a possibleexplanation for the evolution of thecupule’s caracteristics is proposed, rlying on the different morphological variants observedin the studied species. In this way, the morphological links between Nothofagus and Trigonobalanus clearly appear confirming the close link existing between Nothofagus andthe rest of the Fagaceae.
Fil: Picca, Pablo Ignacio. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.