Spore morphology and ultrastructure of Dennstaedtiaceae from Paranaense Phytogeographic Province I.: Genus Dennstaedtia
| Autor: | Gonzalo Javier Marquez, Marta A. Morbelli, Agustina Yañez |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
010506 paleontology Morphology (linguistics) Dennstaedtia Otras Ciencias Biológicas Dennstaedtiaceae 010603 evolutionary biology 01 natural sciences Ciencias Biológicas Reticulate ULTRASTRUCTURE Genus Botany PARANAENSE PROVINCE Ecology Evolution Behavior and Systematics 0105 earth and related environmental sciences biology Paleontology biology.organism_classification Spore SPORES Herbarium DENNSTAEDTIA Ultrastructure MORPHOLOGY CIENCIAS NATURALES Y EXACTAS |
| Popis: | The spore morphology and wall structure of Dennstaedtia species from the Phytogeographic Paranaense Province: Dennstaedtia cicutaria, D. cornuta, D. dissecta, D. globulifera, D. obtusifolia were studied using light microscopy (LM), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The spores are trilete, brown, triangular in polar view and plane-hemispheric to plane-convex in equatorial view. The exospore is homogeneous, with two layers. The perispore has an alveolar structure and is composed of one or two layers. The outer perispore surface bears the sculpture, which has elements of varied shapes (verrucae, ridges, reticles), an different sizes and fusion. This variation allows characterize species or groups of species. Three different types of perispore ornamentation can be found: 1. Verrucate with verrucae covered with rodlets; 2. Verrucate-rugate with verrucae and smooth ridges; 3. Reticulate. The spores constitute an important source of characters with a systematic value for the genus Dennstaedtia and they are a useful tool for the identification of herbarium samples. Fil: Yañez, Agustina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Cátedra de Palinología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Marquez, Gonzalo Javier. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Cátedra de Palinología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Morbelli, Marta Alicia. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Cátedra de Palinología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina |
| Databáze: | OpenAIRE |
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