Taxonomic significance of pollen types in the Guyana Highland-centred composite genera of Mutisioideae (Asteraceae)

The Guyana Highland-centred genera, or <i>Stenopadus</i> group, are a complex of species that belong to the tribes Mutisieae and Stifftieae of Asteraceae. The pollen morphologies of 29 species, from 12 of 13 genera of this complex, are described and illustrated using light and scanning e...

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Detalles Bibliográficos
Autor principal: Tellería, María Cristina
Formato: Articulo
Lenguaje:Inglés
Publicado: 2008
Materias:
Ciencias Naturales
Cardueae
Exine
Gochnatia complex
Guyana complex
Mutisieae
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/84319
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-84319
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Cardueae
Exine
Gochnatia complex
Guyana complex
Mutisieae
spellingShingle Ciencias Naturales
Cardueae
Exine
Gochnatia complex
Guyana complex
Mutisieae
Tellería, María Cristina
Taxonomic significance of pollen types in the Guyana Highland-centred composite genera of Mutisioideae (Asteraceae)
topic_facet Ciencias Naturales
Cardueae
Exine
Gochnatia complex
Guyana complex
Mutisieae
description The Guyana Highland-centred genera, or <i>Stenopadus</i> group, are a complex of species that belong to the tribes Mutisieae and Stifftieae of Asteraceae. The pollen morphologies of 29 species, from 12 of 13 genera of this complex, are described and illustrated using light and scanning electron microscopy. The exine sculpture and structure are highly significant. Four exine types, previously characterized, were distinguished: <i>Gongylolepis</i>, <i>Wunderlichia</i>, <i>Mutisia</i>, and <i>Stenopadus</i>. The characterization of the <i>Stenopadus</i> exine type is enlarged here. These exine types led to the recognition of four well-defined pollen types, whereas the spine length and exine thickness characterized six subtypes. Pollen types circumscribe genera or groups of genera, and some subtypes distinguish species. The pollen morphology within the complex is discussed in relation to the rest of Mutisioideae and other palynologically allied tribes of Cichorioideae. There is little correlation between pollen types and tribes; only the <i>Stenopadus</i> exine type is exclusive to the Stifftieae tribe. The remaining types are shared by the two tribes of the complex. Pollen morphology supports the hypothesis that this group of genera is close to the <i>Gochnatia</i> complex and the Cardueae tribe.
format Articulo
Articulo
author Tellería, María Cristina
author_facet Tellería, María Cristina
author_sort Tellería, María Cristina
title Taxonomic significance of pollen types in the Guyana Highland-centred composite genera of Mutisioideae (Asteraceae)
title_short Taxonomic significance of pollen types in the Guyana Highland-centred composite genera of Mutisioideae (Asteraceae)
title_full Taxonomic significance of pollen types in the Guyana Highland-centred composite genera of Mutisioideae (Asteraceae)
title_fullStr Taxonomic significance of pollen types in the Guyana Highland-centred composite genera of Mutisioideae (Asteraceae)
title_full_unstemmed Taxonomic significance of pollen types in the Guyana Highland-centred composite genera of Mutisioideae (Asteraceae)
title_sort taxonomic significance of pollen types in the guyana highland-centred composite genera of mutisioideae (asteraceae)
publishDate 2008
url http://sedici.unlp.edu.ar/handle/10915/84319
work_keys_str_mv AT telleriamariacristina taxonomicsignificanceofpollentypesintheguyanahighlandcentredcompositegeneraofmutisioideaeasteraceae
bdutipo_str Repositorios
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