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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Autores principales: Márquez, Gonzalo Javier, Morbelli, Marta Alicia, Giudice, Gabriela Elena
Formato: Articulo
Lenguaje:Español
Publicado: 2010
Materias:
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/34497
http://www.scielo.br/pdf/aabc/v82n2/12.pdf
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id I19-R120-10915-34497
record_format dspace
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
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AT morbellimartaalicia palynologicalanalysisofsphaeropterisgardnericyatheaceaepteridophyta
AT giudicegabrielaelena palynologicalanalysisofsphaeropterisgardnericyatheaceaepteridophyta
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