Microspore wall organisation and ultrastructure in two species of Selaginella (Lycophyta) producing permanent tetrads

Autores
Morbelli, Marta Alicia; Lugardon, Bernard
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Spore morphology and ultrastructural features of the permanent microspore tetrads of Selaginella convoluta and S. lepidophylla were studied with light microscopy, scanning and transmission electron microscopy. The four members of each tetrad in S. convoluta are linked together through a common envelope and form an unbroken complex system of alveoli that connects the equatorial and distal regions of the microspores. In the proximal exospore of microspores, no differentiation referable to an apertural fold was observed but an interruption of the exospore is evident in that area in germinating microspores. The distal exospore is composed of three strata: inner zone, intermediate zone and outer alveolar. In S. lepidophylla tetrads, the four microspores are assembled within a common tetrad envelope and are equatorially connected by a prominent ridge. The distal regions of the microspores are free. In the proximal exospore of microspores, no differentiation referable to an apertural fold was observed. The tetrad envelope appears as a wide common coat, which, on the surface and depending on the regions, is granular or alveolate, centrally perforated and, in section, consists of a single layer or forms a two-layered, more or less intricate, network. This envelope has the same contrast as the exospore outer layer and shows, in its median zone, cavities with opaque contents, quite similar to those of the microspore exospore layer. These two different types of tetrads emphasise the outstanding structural diversity of the microspore sporoderm in living Selaginellaceae.
Fil: Morbelli, Marta Alicia. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Lugardon, Bernard. Université Paul Sabatier; Francia
Materia
SELAGINELLACEAE
MICROSPORE TETRADS
EXOSPORE
ULTRASTRUCTURE
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/95662
Acceder
id CONICETDig_2550d393498f176f1659ae21ca3d8743
oai_identifier_str oai:ri.conicet.gov.ar:11336/95662
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Microspore wall organisation and ultrastructure in two species of Selaginella (Lycophyta) producing permanent tetradsMorbelli, Marta AliciaLugardon, BernardSELAGINELLACEAEMICROSPORE TETRADSEXOSPOREULTRASTRUCTUREhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Spore morphology and ultrastructural features of the permanent microspore tetrads of Selaginella convoluta and S. lepidophylla were studied with light microscopy, scanning and transmission electron microscopy. The four members of each tetrad in S. convoluta are linked together through a common envelope and form an unbroken complex system of alveoli that connects the equatorial and distal regions of the microspores. In the proximal exospore of microspores, no differentiation referable to an apertural fold was observed but an interruption of the exospore is evident in that area in germinating microspores. The distal exospore is composed of three strata: inner zone, intermediate zone and outer alveolar. In S. lepidophylla tetrads, the four microspores are assembled within a common tetrad envelope and are equatorially connected by a prominent ridge. The distal regions of the microspores are free. In the proximal exospore of microspores, no differentiation referable to an apertural fold was observed. The tetrad envelope appears as a wide common coat, which, on the surface and depending on the regions, is granular or alveolate, centrally perforated and, in section, consists of a single layer or forms a two-layered, more or less intricate, network. This envelope has the same contrast as the exospore outer layer and shows, in its median zone, cavities with opaque contents, quite similar to those of the microspore exospore layer. These two different types of tetrads emphasise the outstanding structural diversity of the microspore sporoderm in living Selaginellaceae.Fil: Morbelli, Marta Alicia. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Lugardon, Bernard. Université Paul Sabatier; FranciaTaylor & Francis As2012-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/95662Morbelli, Marta Alicia; Lugardon, Bernard; Microspore wall organisation and ultrastructure in two species of Selaginella (Lycophyta) producing permanent tetrads; Taylor & Francis As; Grana; 51; 2; 7-2012; 97-1060017-31341651-2049CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.tandfonline.com/doi/full/10.1080/00173134.2012.691109info:eu-repo/semantics/altIdentifier/doi/10.1080/00173134.2012.691109info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:11:49Zoai:ri.conicet.gov.ar:11336/95662instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 11:11:49.671CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Microspore wall organisation and ultrastructure in two species of Selaginella (Lycophyta) producing permanent tetrads
title Microspore wall organisation and ultrastructure in two species of Selaginella (Lycophyta) producing permanent tetrads
spellingShingle Microspore wall organisation and ultrastructure in two species of Selaginella (Lycophyta) producing permanent tetrads
Morbelli, Marta Alicia
SELAGINELLACEAE
MICROSPORE TETRADS
EXOSPORE
ULTRASTRUCTURE
title_short Microspore wall organisation and ultrastructure in two species of Selaginella (Lycophyta) producing permanent tetrads
title_full Microspore wall organisation and ultrastructure in two species of Selaginella (Lycophyta) producing permanent tetrads
title_fullStr Microspore wall organisation and ultrastructure in two species of Selaginella (Lycophyta) producing permanent tetrads
title_full_unstemmed Microspore wall organisation and ultrastructure in two species of Selaginella (Lycophyta) producing permanent tetrads
title_sort Microspore wall organisation and ultrastructure in two species of Selaginella (Lycophyta) producing permanent tetrads
dc.creator.none.fl_str_mv Morbelli, Marta Alicia
Lugardon, Bernard
author Morbelli, Marta Alicia
author_facet Morbelli, Marta Alicia
Lugardon, Bernard
author_role author
author2 Lugardon, Bernard
author2_role author
dc.subject.none.fl_str_mv SELAGINELLACEAE
MICROSPORE TETRADS
EXOSPORE
ULTRASTRUCTURE
topic SELAGINELLACEAE
MICROSPORE TETRADS
EXOSPORE
ULTRASTRUCTURE
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Spore morphology and ultrastructural features of the permanent microspore tetrads of Selaginella convoluta and S. lepidophylla were studied with light microscopy, scanning and transmission electron microscopy. The four members of each tetrad in S. convoluta are linked together through a common envelope and form an unbroken complex system of alveoli that connects the equatorial and distal regions of the microspores. In the proximal exospore of microspores, no differentiation referable to an apertural fold was observed but an interruption of the exospore is evident in that area in germinating microspores. The distal exospore is composed of three strata: inner zone, intermediate zone and outer alveolar. In S. lepidophylla tetrads, the four microspores are assembled within a common tetrad envelope and are equatorially connected by a prominent ridge. The distal regions of the microspores are free. In the proximal exospore of microspores, no differentiation referable to an apertural fold was observed. The tetrad envelope appears as a wide common coat, which, on the surface and depending on the regions, is granular or alveolate, centrally perforated and, in section, consists of a single layer or forms a two-layered, more or less intricate, network. This envelope has the same contrast as the exospore outer layer and shows, in its median zone, cavities with opaque contents, quite similar to those of the microspore exospore layer. These two different types of tetrads emphasise the outstanding structural diversity of the microspore sporoderm in living Selaginellaceae.
Fil: Morbelli, Marta Alicia. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Lugardon, Bernard. Université Paul Sabatier; Francia
description Spore morphology and ultrastructural features of the permanent microspore tetrads of Selaginella convoluta and S. lepidophylla were studied with light microscopy, scanning and transmission electron microscopy. The four members of each tetrad in S. convoluta are linked together through a common envelope and form an unbroken complex system of alveoli that connects the equatorial and distal regions of the microspores. In the proximal exospore of microspores, no differentiation referable to an apertural fold was observed but an interruption of the exospore is evident in that area in germinating microspores. The distal exospore is composed of three strata: inner zone, intermediate zone and outer alveolar. In S. lepidophylla tetrads, the four microspores are assembled within a common tetrad envelope and are equatorially connected by a prominent ridge. The distal regions of the microspores are free. In the proximal exospore of microspores, no differentiation referable to an apertural fold was observed. The tetrad envelope appears as a wide common coat, which, on the surface and depending on the regions, is granular or alveolate, centrally perforated and, in section, consists of a single layer or forms a two-layered, more or less intricate, network. This envelope has the same contrast as the exospore outer layer and shows, in its median zone, cavities with opaque contents, quite similar to those of the microspore exospore layer. These two different types of tetrads emphasise the outstanding structural diversity of the microspore sporoderm in living Selaginellaceae.
publishDate 2012
dc.date.none.fl_str_mv 2012-07
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/95662
Morbelli, Marta Alicia; Lugardon, Bernard; Microspore wall organisation and ultrastructure in two species of Selaginella (Lycophyta) producing permanent tetrads; Taylor & Francis As; Grana; 51; 2; 7-2012; 97-106
0017-3134
1651-2049
CONICET Digital
CONICET
url http://hdl.handle.net/11336/95662
identifier_str_mv Morbelli, Marta Alicia; Lugardon, Bernard; Microspore wall organisation and ultrastructure in two species of Selaginella (Lycophyta) producing permanent tetrads; Taylor & Francis As; Grana; 51; 2; 7-2012; 97-106
0017-3134
1651-2049
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.tandfonline.com/doi/full/10.1080/00173134.2012.691109
info:eu-repo/semantics/altIdentifier/doi/10.1080/00173134.2012.691109
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Taylor & Francis As
publisher.none.fl_str_mv Taylor & Francis As
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1846781502148313088
score 12.982451

Publicaciones similares