Spore morphology and wall ultrastructure of Actinostachys pennula (Sw.) Hook. and A. subtrijuga (Mart.) C. Presl. (Schizaeaceae)

Autores
Ramos Giacosa, Juan Pablo; Barakat, María Candela
Año de publicación
2018
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Actinostachys is a genus of the Schizaeaceae with two species reported from America: A. pennula and A. subtrijuga. The spores of the two species are studied using light microscopy, scanning electron microscopy and transmission electron microscopy. The spores are monolete, the equatorial diameter is 46–84 μm and the polar diameter is 26–50 μm. In A. pennula the ornamentation of the spores is foveolate and in A. subtrijuga it is striate, composed by parallel ridges separated by ornamented grooves. In both species, the exospore is two-layered and it is the wall that constitutes the ornamentation of the spores. The perispore is two-layered and thin with granules, and covers the outer surfaces of the exospore including the foveolae. On the spore surface of both species, abundant spheroids are observed. The ultrastructural analysis reveals that some of them are spherules and others globules. The studied species can be easily identified by their spores analysed with light microscopy even without prior treatment. We recommend that the spore ornamentation be included in dichotomous keys and descriptions of Actinostachys. The sporoderm ultrastructure of the species is described for the first time. The results contribute to the identification of the species and also may be valuable characters for systematic and phylogenetic purposes.
Fil: Ramos Giacosa, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Cátedra de Morfología Vegetal; Argentina
Fil: Barakat, María Candela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Cátedra de Morfología Vegetal; Argentina
Materia
Actinostachys
Morphology
Schizaeaceae
Spores
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:11336/81827
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/81827
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Spore morphology and wall ultrastructure of Actinostachys pennula (Sw.) Hook. and A. subtrijuga (Mart.) C. Presl. (Schizaeaceae)Ramos Giacosa, Juan PabloBarakat, María CandelaActinostachysMorphologySchizaeaceaeSporesUltrastructurehttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1https://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Actinostachys is a genus of the Schizaeaceae with two species reported from America: A. pennula and A. subtrijuga. The spores of the two species are studied using light microscopy, scanning electron microscopy and transmission electron microscopy. The spores are monolete, the equatorial diameter is 46–84 μm and the polar diameter is 26–50 μm. In A. pennula the ornamentation of the spores is foveolate and in A. subtrijuga it is striate, composed by parallel ridges separated by ornamented grooves. In both species, the exospore is two-layered and it is the wall that constitutes the ornamentation of the spores. The perispore is two-layered and thin with granules, and covers the outer surfaces of the exospore including the foveolae. On the spore surface of both species, abundant spheroids are observed. The ultrastructural analysis reveals that some of them are spherules and others globules. The studied species can be easily identified by their spores analysed with light microscopy even without prior treatment. We recommend that the spore ornamentation be included in dichotomous keys and descriptions of Actinostachys. The sporoderm ultrastructure of the species is described for the first time. The results contribute to the identification of the species and also may be valuable characters for systematic and phylogenetic purposes.Fil: Ramos Giacosa, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Cátedra de Morfología Vegetal; ArgentinaFil: Barakat, María Candela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Cátedra de Morfología Vegetal; ArgentinaAmerican Association of Stratigraphic Palynologists Foundation2018-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/81827Ramos Giacosa, Juan Pablo; Barakat, María Candela; Spore morphology and wall ultrastructure of Actinostachys pennula (Sw.) Hook. and A. subtrijuga (Mart.) C. Presl. (Schizaeaceae); American Association of Stratigraphic Palynologists Foundation; Palynology; 42; 4; 10-2018; 483-4910191-6122CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.tandfonline.com/doi/full/10.1080/01916122.2017.1413688info:eu-repo/semantics/altIdentifier/doi/10.1080/01916122.2017.1413688info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:03:51Zoai:ri.conicet.gov.ar:11336/81827instacron: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:34982025-09-29 10:03:52.114CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Spore morphology and wall ultrastructure of Actinostachys pennula (Sw.) Hook. and A. subtrijuga (Mart.) C. Presl. (Schizaeaceae)
title Spore morphology and wall ultrastructure of Actinostachys pennula (Sw.) Hook. and A. subtrijuga (Mart.) C. Presl. (Schizaeaceae)
spellingShingle Spore morphology and wall ultrastructure of Actinostachys pennula (Sw.) Hook. and A. subtrijuga (Mart.) C. Presl. (Schizaeaceae)
Ramos Giacosa, Juan Pablo
Actinostachys
Morphology
Schizaeaceae
Spores
Ultrastructure
title_short Spore morphology and wall ultrastructure of Actinostachys pennula (Sw.) Hook. and A. subtrijuga (Mart.) C. Presl. (Schizaeaceae)
title_full Spore morphology and wall ultrastructure of Actinostachys pennula (Sw.) Hook. and A. subtrijuga (Mart.) C. Presl. (Schizaeaceae)
title_fullStr Spore morphology and wall ultrastructure of Actinostachys pennula (Sw.) Hook. and A. subtrijuga (Mart.) C. Presl. (Schizaeaceae)
title_full_unstemmed Spore morphology and wall ultrastructure of Actinostachys pennula (Sw.) Hook. and A. subtrijuga (Mart.) C. Presl. (Schizaeaceae)
title_sort Spore morphology and wall ultrastructure of Actinostachys pennula (Sw.) Hook. and A. subtrijuga (Mart.) C. Presl. (Schizaeaceae)
dc.creator.none.fl_str_mv Ramos Giacosa, Juan Pablo
Barakat, María Candela
author Ramos Giacosa, Juan Pablo
author_facet Ramos Giacosa, Juan Pablo
Barakat, María Candela
author_role author
author2 Barakat, María Candela
author2_role author
dc.subject.none.fl_str_mv Actinostachys
Morphology
Schizaeaceae
Spores
Ultrastructure
topic Actinostachys
Morphology
Schizaeaceae
Spores
Ultrastructure
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Actinostachys is a genus of the Schizaeaceae with two species reported from America: A. pennula and A. subtrijuga. The spores of the two species are studied using light microscopy, scanning electron microscopy and transmission electron microscopy. The spores are monolete, the equatorial diameter is 46–84 μm and the polar diameter is 26–50 μm. In A. pennula the ornamentation of the spores is foveolate and in A. subtrijuga it is striate, composed by parallel ridges separated by ornamented grooves. In both species, the exospore is two-layered and it is the wall that constitutes the ornamentation of the spores. The perispore is two-layered and thin with granules, and covers the outer surfaces of the exospore including the foveolae. On the spore surface of both species, abundant spheroids are observed. The ultrastructural analysis reveals that some of them are spherules and others globules. The studied species can be easily identified by their spores analysed with light microscopy even without prior treatment. We recommend that the spore ornamentation be included in dichotomous keys and descriptions of Actinostachys. The sporoderm ultrastructure of the species is described for the first time. The results contribute to the identification of the species and also may be valuable characters for systematic and phylogenetic purposes.
Fil: Ramos Giacosa, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Cátedra de Morfología Vegetal; Argentina
Fil: Barakat, María Candela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Cátedra de Morfología Vegetal; Argentina
description Actinostachys is a genus of the Schizaeaceae with two species reported from America: A. pennula and A. subtrijuga. The spores of the two species are studied using light microscopy, scanning electron microscopy and transmission electron microscopy. The spores are monolete, the equatorial diameter is 46–84 μm and the polar diameter is 26–50 μm. In A. pennula the ornamentation of the spores is foveolate and in A. subtrijuga it is striate, composed by parallel ridges separated by ornamented grooves. In both species, the exospore is two-layered and it is the wall that constitutes the ornamentation of the spores. The perispore is two-layered and thin with granules, and covers the outer surfaces of the exospore including the foveolae. On the spore surface of both species, abundant spheroids are observed. The ultrastructural analysis reveals that some of them are spherules and others globules. The studied species can be easily identified by their spores analysed with light microscopy even without prior treatment. We recommend that the spore ornamentation be included in dichotomous keys and descriptions of Actinostachys. The sporoderm ultrastructure of the species is described for the first time. The results contribute to the identification of the species and also may be valuable characters for systematic and phylogenetic purposes.
publishDate 2018
dc.date.none.fl_str_mv 2018-10
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/11336/81827
Ramos Giacosa, Juan Pablo; Barakat, María Candela; Spore morphology and wall ultrastructure of Actinostachys pennula (Sw.) Hook. and A. subtrijuga (Mart.) C. Presl. (Schizaeaceae); American Association of Stratigraphic Palynologists Foundation; Palynology; 42; 4; 10-2018; 483-491
0191-6122
CONICET Digital
CONICET
url http://hdl.handle.net/11336/81827
identifier_str_mv Ramos Giacosa, Juan Pablo; Barakat, María Candela; Spore morphology and wall ultrastructure of Actinostachys pennula (Sw.) Hook. and A. subtrijuga (Mart.) C. Presl. (Schizaeaceae); American Association of Stratigraphic Palynologists Foundation; Palynology; 42; 4; 10-2018; 483-491
0191-6122
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/10.1080/01916122.2017.1413688
info:eu-repo/semantics/altIdentifier/doi/10.1080/01916122.2017.1413688
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
application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Association of Stratigraphic Palynologists Foundation
publisher.none.fl_str_mv American Association of Stratigraphic Palynologists Foundation
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
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score 13.070432

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