Spore morphology and ornamentation in the genus <i>Blechnum</i> (Blechnaceae)

A study of the spores of 64 neotropical and palaeotropical taxa of the genus Blechnum was performed using scanning electron microscopy (SEM). Two basic types of perispores were recognised: perispore smooth or only slightly ornamented (laevigate, with micro-granules or micro-lamellae, venulose and ru...

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Autores principales:	Passarelli, Lilian Mónica, Gabriel y Galán, José Maria, Prada, Carmen, Rolleri, Cristina Hilda
Formato:	Articulo
Lenguaje:	Español
Publicado:	2010
Materias:	Ciencias Naturales Botánica perispore ornamentation rugate foliose rugulate laevigate micro-ornamentation perispore structure Plantas Esporas
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/40363 http://www.tandfonline.com/doi/abs/10.1080/00173134.2010.524245#tabModule
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-40363
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Español
topic	Ciencias Naturales Botánica perispore ornamentation rugate foliose rugulate laevigate micro-ornamentation perispore structure Plantas Esporas
spellingShingle	Ciencias Naturales Botánica perispore ornamentation rugate foliose rugulate laevigate micro-ornamentation perispore structure Plantas Esporas Passarelli, Lilian Mónica Gabriel y Galán, José Maria Prada, Carmen Rolleri, Cristina Hilda Spore morphology and ornamentation in the genus <i>Blechnum</i> (Blechnaceae)
topic_facet	Ciencias Naturales Botánica perispore ornamentation rugate foliose rugulate laevigate micro-ornamentation perispore structure Plantas Esporas
description	A study of the spores of 64 neotropical and palaeotropical taxa of the genus Blechnum was performed using scanning electron microscopy (SEM). Two basic types of perispores were recognised: perispore smooth or only slightly ornamented (laevigate, with micro-granules or micro-lamellae, venulose and rugulate), and perispore ornamented (rugate, low reticulate, cristatereticulate, orbiculate, and colliculate). SEM observations allow for distinguishing differences in the structure of perispores, but the character does not correlate with the ornamentation. The smooth exospore predominates among the studied species. Results suggest that perispore characters have important diagnostic value, since different combinations of ornamentation/ structure were found among the studied species. Moreover, when spore characters are considered together with other morphological traits of the sporophytes and the habit of plants, ornamentation of spores becomes a useful complementary feature at the specific level. The results are discussed in light of the recent systematic studies and emphasise that any eventual subdivision of the genus Blechnum must include characters of the sporophyte as well as spore features to ensure a more robust classification than the previously proposed. The spores also show a significant affinity between Blechnum and other genera of Blechnaceae, which was also suggested by recent phylogenetic studies.
format	Articulo Articulo
author	Passarelli, Lilian Mónica Gabriel y Galán, José Maria Prada, Carmen Rolleri, Cristina Hilda
author_facet	Passarelli, Lilian Mónica Gabriel y Galán, José Maria Prada, Carmen Rolleri, Cristina Hilda
author_sort	Passarelli, Lilian Mónica
title	Spore morphology and ornamentation in the genus <i>Blechnum</i> (Blechnaceae)
title_short	Spore morphology and ornamentation in the genus <i>Blechnum</i> (Blechnaceae)
title_full	Spore morphology and ornamentation in the genus <i>Blechnum</i> (Blechnaceae)
title_fullStr	Spore morphology and ornamentation in the genus <i>Blechnum</i> (Blechnaceae)
title_full_unstemmed	Spore morphology and ornamentation in the genus <i>Blechnum</i> (Blechnaceae)
title_sort	spore morphology and ornamentation in the genus <i>blechnum</i> (blechnaceae)
publishDate	2010
url	http://sedici.unlp.edu.ar/handle/10915/40363 http://www.tandfonline.com/doi/abs/10.1080/00173134.2010.524245#tabModule
work_keys_str_mv	AT passarellililianmonica sporemorphologyandornamentationinthegenusiblechnumiblechnaceae AT gabrielygalanjosemaria sporemorphologyandornamentationinthegenusiblechnumiblechnaceae AT pradacarmen sporemorphologyandornamentationinthegenusiblechnumiblechnaceae AT rollericristinahilda sporemorphologyandornamentationinthegenusiblechnumiblechnaceae
bdutipo_str	Repositorios
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Spore morphology and ornamentation in the genus <i>Blechnum</i> (Blechnaceae)

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