Spore morphology and ultrastructure of Cyathea (Cyatheaceae, Pteridophyta) species from southern South America
Spore sculpture and wall structure of eight Cyathea (Cyatheaceae) species from southern South America were studied using light microscopy (LM), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) techniques. Two layers, i.e. an inner and an outer layer, were observed in the...
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| Formato: | Articulo |
| Lenguaje: | Inglés |
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2010
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/82509 |
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I19-R120-10915-82509 |
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dspace |
| institution |
Universidad Nacional de La Plata |
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I-19 |
| repository_str |
R-120 |
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SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ciencias Naturales Cyathea Cyatheaceae Morphology Southern South America Spores Ultrastructure |
| spellingShingle |
Ciencias Naturales Cyathea Cyatheaceae Morphology Southern South America Spores Ultrastructure Márquez, Gonzalo Javier Morbelli, Marta Alicia Giudice, Gabriela Elena Spore morphology and ultrastructure of Cyathea (Cyatheaceae, Pteridophyta) species from southern South America |
| topic_facet |
Ciencias Naturales Cyathea Cyatheaceae Morphology Southern South America Spores Ultrastructure |
| description |
Spore sculpture and wall structure of eight Cyathea (Cyatheaceae) species from southern South America were studied using light microscopy (LM), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) techniques. Two layers, i.e. an inner and an outer layer, were observed in the perispore. The inner layer has two strata: the inner stratum is attached to the exospore and composed of rodlets tangentially oriented to the spore surface and randomly intermixed; the outer stratum consists of a three-dimensional network of rodlets with either free or fused distal edges forming spinules. The outer layer is thin, darkly contrasted and covers the rodlets. In most cases, the exospore has two layers and a pitted surface. In Cyathea atrovirens, the exospore surface is smooth, while in C. delgadii and C. myriotricha it is verrucate. The homogeneity of perispore features within the genus Cyathea is evident, while exospore features are heterogeneous. The exospore has different kinds of surface-structures that are of potential interest for assessing evolutionary trends within the group. |
| 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 |
Spore morphology and ultrastructure of Cyathea (Cyatheaceae, Pteridophyta) species from southern South America |
| title_short |
Spore morphology and ultrastructure of Cyathea (Cyatheaceae, Pteridophyta) species from southern South America |
| title_full |
Spore morphology and ultrastructure of Cyathea (Cyatheaceae, Pteridophyta) species from southern South America |
| title_fullStr |
Spore morphology and ultrastructure of Cyathea (Cyatheaceae, Pteridophyta) species from southern South America |
| title_full_unstemmed |
Spore morphology and ultrastructure of Cyathea (Cyatheaceae, Pteridophyta) species from southern South America |
| title_sort |
spore morphology and ultrastructure of cyathea (cyatheaceae, pteridophyta) species from southern south america |
| publishDate |
2010 |
| url |
http://sedici.unlp.edu.ar/handle/10915/82509 |
| work_keys_str_mv |
AT marquezgonzalojavier sporemorphologyandultrastructureofcyatheacyatheaceaepteridophytaspeciesfromsouthernsouthamerica AT morbellimartaalicia sporemorphologyandultrastructureofcyatheacyatheaceaepteridophytaspeciesfromsouthernsouthamerica AT giudicegabrielaelena sporemorphologyandultrastructureofcyatheacyatheaceaepteridophytaspeciesfromsouthernsouthamerica |
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Repositorios |
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1764820488353218561 |