Palynological analysis of Sphaeropteris gardneri (Cyatheaceae, Pteridophyta)
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Academia Brasileira de Ciências
2010
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| author | Gonzalo J. Marquez |
| author_facet | Gonzalo J. Marquez |
| contents | Palynological analysis of Sphaeropteris gardneri (Cyatheaceae, Pteridophyta) Gonzalo J. Marquez Marta A. Morbelli Gabriela E. Giudice Multidisciplinaria (Ciencias Naturales y Exactas) spores morphology Sphaeropteris ultrastructure The spore morphology and wall ultrastructure of Sphaeropteris gardneri (Hook.) R.M. Tryon from Brazil were analyzed with LM, SEM and TEM. The spores are trilete with an ornamentation formed of short low ridges with spines in their margins. The exospore is 2.5μm thick, two- layered in section and single or branched channels are present. The perispore is 1.2μm thick and two-layered. The inner layer has three strata: the inner stratum is formed of a network of branched and fused threads, the middle stratum has threads with a radial orientation and in the outer stratum thin, dark fibres are immersed in a less dense contrasted matrix. The outer layer of the perispore is the one that forms the echinate-ridges and is constituted of threads arranged in a compact way. Globules of different sizes are observed on the surface. The differences found in the perispore ornamentation and ultrastructure in Alsophila, which was previously studied, and those of Sphaeropteris, show a tendency to wall complexity. 2010 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32713482012 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.2 Vol.82 |
| format | Artículo científico |
| id | redalyc_32713482012 |
| institution | Redalyc |
| language | en |
| publishDate | 2010 |
| publisher | Academia Brasileira de Ciências |
| spellingShingle | Palynological analysis of Sphaeropteris gardneri (Cyatheaceae, Pteridophyta) Gonzalo J. Marquez Multidisciplinaria (Ciencias Naturales y Exactas) spores morphology Sphaeropteris ultrastructure Palynological analysis of Sphaeropteris gardneri (Cyatheaceae, Pteridophyta) Gonzalo J. Marquez Marta A. Morbelli Gabriela E. Giudice Multidisciplinaria (Ciencias Naturales y Exactas) spores morphology Sphaeropteris ultrastructure The spore morphology and wall ultrastructure of Sphaeropteris gardneri (Hook.) R.M. Tryon from Brazil were analyzed with LM, SEM and TEM. The spores are trilete with an ornamentation formed of short low ridges with spines in their margins. The exospore is 2.5μm thick, two- layered in section and single or branched channels are present. The perispore is 1.2μm thick and two-layered. The inner layer has three strata: the inner stratum is formed of a network of branched and fused threads, the middle stratum has threads with a radial orientation and in the outer stratum thin, dark fibres are immersed in a less dense contrasted matrix. The outer layer of the perispore is the one that forms the echinate-ridges and is constituted of threads arranged in a compact way. Globules of different sizes are observed on the surface. The differences found in the perispore ornamentation and ultrastructure in Alsophila, which was previously studied, and those of Sphaeropteris, show a tendency to wall complexity. 2010 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32713482012 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.2 Vol.82 |
| title | Palynological analysis of Sphaeropteris gardneri (Cyatheaceae, Pteridophyta) |
| topic | Multidisciplinaria (Ciencias Naturales y Exactas) spores morphology Sphaeropteris ultrastructure |
| url | https://www.redalyc.org/articulo.oa?id=32713482012 |