Palynological analysis of sphaeropteris gardneri (cyatheaceae, pteridophyta)
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 2.5/μm thick, two- layered in section and si...
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Formato: | Articulo |
Lenguaje: | Español |
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2010
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Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/34497 http://www.scielo.br/pdf/aabc/v82n2/12.pdf |
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I19-R120-10915-34497 |
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institution |
Universidad Nacional de La Plata |
institution_str |
I-19 |
repository_str |
R-120 |
collection |
SEDICI (UNLP) |
language |
Español |
topic |
Biología Ciencias Exactas morphology bacterial spore sphaeropteris cytology spores electron microscopy ultrastructure fern Cyatheaceae Pteridophyta |
spellingShingle |
Biología Ciencias Exactas morphology bacterial spore sphaeropteris cytology spores electron microscopy ultrastructure fern Cyatheaceae Pteridophyta Márquez, Gonzalo Javier Morbelli, Marta Alicia Giudice, Gabriela Elena Palynological analysis of sphaeropteris gardneri (cyatheaceae, pteridophyta) |
topic_facet |
Biología Ciencias Exactas morphology bacterial spore sphaeropteris cytology spores electron microscopy ultrastructure fern Cyatheaceae Pteridophyta |
description |
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 2.5/μm thick, two- layered in section and single or branched channels are present. The perispore is 1.2/xm 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. |
format |
Articulo Articulo |
author |
Márquez, Gonzalo Javier Morbelli, Marta Alicia Giudice, Gabriela Elena |
author_facet |
Márquez, Gonzalo Javier Morbelli, Marta Alicia Giudice, Gabriela Elena |
author_sort |
Márquez, Gonzalo Javier |
title |
Palynological analysis of sphaeropteris gardneri (cyatheaceae, pteridophyta) |
title_short |
Palynological analysis of sphaeropteris gardneri (cyatheaceae, pteridophyta) |
title_full |
Palynological analysis of sphaeropteris gardneri (cyatheaceae, pteridophyta) |
title_fullStr |
Palynological analysis of sphaeropteris gardneri (cyatheaceae, pteridophyta) |
title_full_unstemmed |
Palynological analysis of sphaeropteris gardneri (cyatheaceae, pteridophyta) |
title_sort |
palynological analysis of sphaeropteris gardneri (cyatheaceae, pteridophyta) |
publishDate |
2010 |
url |
http://sedici.unlp.edu.ar/handle/10915/34497 http://www.scielo.br/pdf/aabc/v82n2/12.pdf |
work_keys_str_mv |
AT marquezgonzalojavier palynologicalanalysisofsphaeropterisgardnericyatheaceaepteridophyta AT morbellimartaalicia palynologicalanalysisofsphaeropterisgardnericyatheaceaepteridophyta AT giudicegabrielaelena palynologicalanalysisofsphaeropterisgardnericyatheaceaepteridophyta |
bdutipo_str |
Repositorios |
_version_ |
1764820469928689665 |