Microspore Morphology of Isoetes Species (Lycophyta) from Southern South America

Autores
Macluf, Carmen Cecilia; Morbelli, Marta Alicia; Giudice, Gabriela Elena
Año de publicación
2006
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Microspores of the 24 species of Isoetes that grow in southern South America were analyzed under a light microscope and scanning electron microscope. The microspores are monolete, elliptic in polar view, 30–40 µm long, and 20–25 µm wide. A background with various characteristics is seen on each surface. A supra-laesural expansion is present. The perispore is ornamented and has a perforated background. In section, it has a lacunose structure. The exospore is smooth, and it has a compact structure in section. The studied species could be divided into three groups by their perispore ornamentation: equinate, rugulate, and tuberculate. Microspore size was positively correlated with increasing ploidy level, and larger microspores were associated with terrestrial habitats. A convergence in ornamentation was found between spores produced by the studied species and those that grow in regions outside of the area under study.
Se analizaron con microscopio óptico y electrónico de barrido las microsporas de veinticuatro especies de Isoetes que crecen en Sud América Austral. Las microsporas son monoletes, elípticas en vista polar, de 30-40 p,m de longitud y 20-25 p,m de ancho. En superficie se observa una base con diversas características. Una expansión sobre la lesura está presente. El perisporio está ornamentado y tiene una base perforada. En sección, tiene una estructura lacunosa. El exosporio es liso y en sección tiene estructura compacta. Las especies estudiadas se pueden reunir en tres grupos de acuerdo a la ornamentación del perisporio, estos son: equinado, rugulado y tuberculado. Se ha observado que existe una correlación positiva entre el tamaño de las microsporas y el incremento en el nivel de ploidía y el hábitat. Se observó una convergencia en la ornamentación entre las esporas producidas por las especies estudiadas y las producidas por otras especies que crecen en regiones fuera del área de estudio.
Facultad de Ciencias Naturales y Museo
Materia
Botánica
Sud América
Isoetes
Microsporas
Morfología
Escultura
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/135356

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spelling Microspore Morphology of Isoetes Species (Lycophyta) from Southern South AmericaMacluf, Carmen CeciliaMorbelli, Marta AliciaGiudice, Gabriela ElenaBotánicaSud AméricaIsoetesMicrosporasMorfologíaEsculturaMicrospores of the 24 species of Isoetes that grow in southern South America were analyzed under a light microscope and scanning electron microscope. The microspores are monolete, elliptic in polar view, 30–40 µm long, and 20–25 µm wide. A background with various characteristics is seen on each surface. A supra-laesural expansion is present. The perispore is ornamented and has a perforated background. In section, it has a lacunose structure. The exospore is smooth, and it has a compact structure in section. The studied species could be divided into three groups by their perispore ornamentation: equinate, rugulate, and tuberculate. Microspore size was positively correlated with increasing ploidy level, and larger microspores were associated with terrestrial habitats. A convergence in ornamentation was found between spores produced by the studied species and those that grow in regions outside of the area under study.Se analizaron con microscopio óptico y electrónico de barrido las microsporas de veinticuatro especies de Isoetes que crecen en Sud América Austral. Las microsporas son monoletes, elípticas en vista polar, de 30-40 p,m de longitud y 20-25 p,m de ancho. En superficie se observa una base con diversas características. Una expansión sobre la lesura está presente. El perisporio está ornamentado y tiene una base perforada. En sección, tiene una estructura lacunosa. El exosporio es liso y en sección tiene estructura compacta. Las especies estudiadas se pueden reunir en tres grupos de acuerdo a la ornamentación del perisporio, estos son: equinado, rugulado y tuberculado. Se ha observado que existe una correlación positiva entre el tamaño de las microsporas y el incremento en el nivel de ploidía y el hábitat. Se observó una convergencia en la ornamentación entre las esporas producidas por las especies estudiadas y las producidas por otras especies que crecen en regiones fuera del área de estudio.Facultad de Ciencias Naturales y Museo2006info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf121-134http://sedici.unlp.edu.ar/handle/10915/135356enginfo:eu-repo/semantics/altIdentifier/issn/0006-8101info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:32:31Zoai:sedici.unlp.edu.ar:10915/135356Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:32:32.098SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Microspore Morphology of Isoetes Species (Lycophyta) from Southern South America
title Microspore Morphology of Isoetes Species (Lycophyta) from Southern South America
spellingShingle Microspore Morphology of Isoetes Species (Lycophyta) from Southern South America
Macluf, Carmen Cecilia
Botánica
Sud América
Isoetes
Microsporas
Morfología
Escultura
title_short Microspore Morphology of Isoetes Species (Lycophyta) from Southern South America
title_full Microspore Morphology of Isoetes Species (Lycophyta) from Southern South America
title_fullStr Microspore Morphology of Isoetes Species (Lycophyta) from Southern South America
title_full_unstemmed Microspore Morphology of Isoetes Species (Lycophyta) from Southern South America
title_sort Microspore Morphology of Isoetes Species (Lycophyta) from Southern South America
dc.creator.none.fl_str_mv Macluf, Carmen Cecilia
Morbelli, Marta Alicia
Giudice, Gabriela Elena
author Macluf, Carmen Cecilia
author_facet Macluf, Carmen Cecilia
Morbelli, Marta Alicia
Giudice, Gabriela Elena
author_role author
author2 Morbelli, Marta Alicia
Giudice, Gabriela Elena
author2_role author
author
dc.subject.none.fl_str_mv Botánica
Sud América
Isoetes
Microsporas
Morfología
Escultura
topic Botánica
Sud América
Isoetes
Microsporas
Morfología
Escultura
dc.description.none.fl_txt_mv Microspores of the 24 species of Isoetes that grow in southern South America were analyzed under a light microscope and scanning electron microscope. The microspores are monolete, elliptic in polar view, 30–40 µm long, and 20–25 µm wide. A background with various characteristics is seen on each surface. A supra-laesural expansion is present. The perispore is ornamented and has a perforated background. In section, it has a lacunose structure. The exospore is smooth, and it has a compact structure in section. The studied species could be divided into three groups by their perispore ornamentation: equinate, rugulate, and tuberculate. Microspore size was positively correlated with increasing ploidy level, and larger microspores were associated with terrestrial habitats. A convergence in ornamentation was found between spores produced by the studied species and those that grow in regions outside of the area under study.
Se analizaron con microscopio óptico y electrónico de barrido las microsporas de veinticuatro especies de Isoetes que crecen en Sud América Austral. Las microsporas son monoletes, elípticas en vista polar, de 30-40 p,m de longitud y 20-25 p,m de ancho. En superficie se observa una base con diversas características. Una expansión sobre la lesura está presente. El perisporio está ornamentado y tiene una base perforada. En sección, tiene una estructura lacunosa. El exosporio es liso y en sección tiene estructura compacta. Las especies estudiadas se pueden reunir en tres grupos de acuerdo a la ornamentación del perisporio, estos son: equinado, rugulado y tuberculado. Se ha observado que existe una correlación positiva entre el tamaño de las microsporas y el incremento en el nivel de ploidía y el hábitat. Se observó una convergencia en la ornamentación entre las esporas producidas por las especies estudiadas y las producidas por otras especies que crecen en regiones fuera del área de estudio.
Facultad de Ciencias Naturales y Museo
description Microspores of the 24 species of Isoetes that grow in southern South America were analyzed under a light microscope and scanning electron microscope. The microspores are monolete, elliptic in polar view, 30–40 µm long, and 20–25 µm wide. A background with various characteristics is seen on each surface. A supra-laesural expansion is present. The perispore is ornamented and has a perforated background. In section, it has a lacunose structure. The exospore is smooth, and it has a compact structure in section. The studied species could be divided into three groups by their perispore ornamentation: equinate, rugulate, and tuberculate. Microspore size was positively correlated with increasing ploidy level, and larger microspores were associated with terrestrial habitats. A convergence in ornamentation was found between spores produced by the studied species and those that grow in regions outside of the area under study.
publishDate 2006
dc.date.none.fl_str_mv 2006
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/135356
url http://sedici.unlp.edu.ar/handle/10915/135356
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0006-8101
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
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121-134
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