Pollen, tapetum and orbicule development in Modiolastrum malvifolium (Malvaceae)

Autores
Galati, B.G.; Monacci, F.; Gotelli, M.M.; Rosenfeldt, S.
Año de publicación
2007
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
• Background and Aims: Although orbicular functions are still a matter of debate, they are considered by most authors to be exclusively formed by a secretory tapetum. However, the presence of orbicules on a peritapetal membrane associated with a plasmodial tapetum has been described for Abutilon pictum (Malvaceae) in a previous study. Thus, studies on other species of Malvaceae are necessary to corroborate the presence of such bodies in other members of the family. Pollen and microsporangium development of Modiolastrum malvifolium has been studied in this work. • Methods: Anthers at different stages of development were processed for transmission electron microscopy and light microscopy. Membranes and pollen walls resistant to acetolysis were isolated from whole anthers. • Key Results: Microspore tetrads have a tetrahedral arrangement. Pollen grains are shed at the bicellular stage. The tapetum is invasive, non-syncytial and a peritapetal membrane with orbicules is formed. • Conclusions: This is the first report of the presence of orbicules on a peritapetal membrane in a species with a tapetum of an invasive, non-syncytial type. Taking into consideration all the information on the subject, it can be concluded that the presence of orbicules is not a stable criterion to differentiate between a secretory or plasmodial, or intermediate invasive, non-syncytial tapetum. © The Author 2007. Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved.
Fil:Galati, B.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fil:Monacci, F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fil:Gotelli, M.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fil:Rosenfeldt, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fuente
Ann. Bot. 2007;99(4):755-763
Materia
Invasive non-syncytial tapetum
Modiolastrum malvifolium
Orbicules
Peritapetal membrane
angiosperm
cytoplasm
developmental stage
invasive species
pollen
spore
Abutilon pictum
Magnoliophyta
Malvaceae
Modiolastrum
angiosperm
article
growth, development and aging
histology
pollen
transmission electron microscopy
ultrastructure
Malvaceae
Microscopy, Electron, Transmission
Pollen
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by/2.5/ar
Repositorio
Biblioteca Digital (UBA-FCEN)
Institución
Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
OAI Identificador
paperaa:paper_03057364_v99_n4_p755_Galati
Acceder
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oai_identifier_str paperaa:paper_03057364_v99_n4_p755_Galati
network_acronym_str BDUBAFCEN
repository_id_str 1896
network_name_str Biblioteca Digital (UBA-FCEN)
spelling Pollen, tapetum and orbicule development in Modiolastrum malvifolium (Malvaceae)Galati, B.G.Monacci, F.Gotelli, M.M.Rosenfeldt, S.Invasive non-syncytial tapetumModiolastrum malvifoliumOrbiculesPeritapetal membraneangiospermcytoplasmdevelopmental stageinvasive speciespollensporeAbutilon pictumMagnoliophytaMalvaceaeModiolastrumangiospermarticlegrowth, development and aginghistologypollentransmission electron microscopyultrastructureMalvaceaeMicroscopy, Electron, TransmissionPollen• Background and Aims: Although orbicular functions are still a matter of debate, they are considered by most authors to be exclusively formed by a secretory tapetum. However, the presence of orbicules on a peritapetal membrane associated with a plasmodial tapetum has been described for Abutilon pictum (Malvaceae) in a previous study. Thus, studies on other species of Malvaceae are necessary to corroborate the presence of such bodies in other members of the family. Pollen and microsporangium development of Modiolastrum malvifolium has been studied in this work. • Methods: Anthers at different stages of development were processed for transmission electron microscopy and light microscopy. Membranes and pollen walls resistant to acetolysis were isolated from whole anthers. • Key Results: Microspore tetrads have a tetrahedral arrangement. Pollen grains are shed at the bicellular stage. The tapetum is invasive, non-syncytial and a peritapetal membrane with orbicules is formed. • Conclusions: This is the first report of the presence of orbicules on a peritapetal membrane in a species with a tapetum of an invasive, non-syncytial type. Taking into consideration all the information on the subject, it can be concluded that the presence of orbicules is not a stable criterion to differentiate between a secretory or plasmodial, or intermediate invasive, non-syncytial tapetum. © The Author 2007. Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved.Fil:Galati, B.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.Fil:Monacci, F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.Fil:Gotelli, M.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.Fil:Rosenfeldt, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.2007info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12110/paper_03057364_v99_n4_p755_GalatiAnn. Bot. 2007;99(4):755-763reponame:Biblioteca Digital (UBA-FCEN)instname:Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturalesinstacron:UBA-FCENenginfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/2.5/ar2025-09-29T13:43:09Zpaperaa:paper_03057364_v99_n4_p755_GalatiInstitucionalhttps://digital.bl.fcen.uba.ar/Universidad públicaNo correspondehttps://digital.bl.fcen.uba.ar/cgi-bin/oaiserver.cgiana@bl.fcen.uba.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:18962025-09-29 13:43:10.899Biblioteca Digital (UBA-FCEN) - Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturalesfalse
dc.title.none.fl_str_mv Pollen, tapetum and orbicule development in Modiolastrum malvifolium (Malvaceae)
title Pollen, tapetum and orbicule development in Modiolastrum malvifolium (Malvaceae)
spellingShingle Pollen, tapetum and orbicule development in Modiolastrum malvifolium (Malvaceae)
Galati, B.G.
Invasive non-syncytial tapetum
Modiolastrum malvifolium
Orbicules
Peritapetal membrane
angiosperm
cytoplasm
developmental stage
invasive species
pollen
spore
Abutilon pictum
Magnoliophyta
Malvaceae
Modiolastrum
angiosperm
article
growth, development and aging
histology
pollen
transmission electron microscopy
ultrastructure
Malvaceae
Microscopy, Electron, Transmission
Pollen
title_short Pollen, tapetum and orbicule development in Modiolastrum malvifolium (Malvaceae)
title_full Pollen, tapetum and orbicule development in Modiolastrum malvifolium (Malvaceae)
title_fullStr Pollen, tapetum and orbicule development in Modiolastrum malvifolium (Malvaceae)
title_full_unstemmed Pollen, tapetum and orbicule development in Modiolastrum malvifolium (Malvaceae)
title_sort Pollen, tapetum and orbicule development in Modiolastrum malvifolium (Malvaceae)
dc.creator.none.fl_str_mv Galati, B.G.
Monacci, F.
Gotelli, M.M.
Rosenfeldt, S.
author Galati, B.G.
author_facet Galati, B.G.
Monacci, F.
Gotelli, M.M.
Rosenfeldt, S.
author_role author
author2 Monacci, F.
Gotelli, M.M.
Rosenfeldt, S.
author2_role author
author
author
dc.subject.none.fl_str_mv Invasive non-syncytial tapetum
Modiolastrum malvifolium
Orbicules
Peritapetal membrane
angiosperm
cytoplasm
developmental stage
invasive species
pollen
spore
Abutilon pictum
Magnoliophyta
Malvaceae
Modiolastrum
angiosperm
article
growth, development and aging
histology
pollen
transmission electron microscopy
ultrastructure
Malvaceae
Microscopy, Electron, Transmission
Pollen
topic Invasive non-syncytial tapetum
Modiolastrum malvifolium
Orbicules
Peritapetal membrane
angiosperm
cytoplasm
developmental stage
invasive species
pollen
spore
Abutilon pictum
Magnoliophyta
Malvaceae
Modiolastrum
angiosperm
article
growth, development and aging
histology
pollen
transmission electron microscopy
ultrastructure
Malvaceae
Microscopy, Electron, Transmission
Pollen
dc.description.none.fl_txt_mv • Background and Aims: Although orbicular functions are still a matter of debate, they are considered by most authors to be exclusively formed by a secretory tapetum. However, the presence of orbicules on a peritapetal membrane associated with a plasmodial tapetum has been described for Abutilon pictum (Malvaceae) in a previous study. Thus, studies on other species of Malvaceae are necessary to corroborate the presence of such bodies in other members of the family. Pollen and microsporangium development of Modiolastrum malvifolium has been studied in this work. • Methods: Anthers at different stages of development were processed for transmission electron microscopy and light microscopy. Membranes and pollen walls resistant to acetolysis were isolated from whole anthers. • Key Results: Microspore tetrads have a tetrahedral arrangement. Pollen grains are shed at the bicellular stage. The tapetum is invasive, non-syncytial and a peritapetal membrane with orbicules is formed. • Conclusions: This is the first report of the presence of orbicules on a peritapetal membrane in a species with a tapetum of an invasive, non-syncytial type. Taking into consideration all the information on the subject, it can be concluded that the presence of orbicules is not a stable criterion to differentiate between a secretory or plasmodial, or intermediate invasive, non-syncytial tapetum. © The Author 2007. Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved.
Fil:Galati, B.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fil:Monacci, F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fil:Gotelli, M.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fil:Rosenfeldt, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
description • Background and Aims: Although orbicular functions are still a matter of debate, they are considered by most authors to be exclusively formed by a secretory tapetum. However, the presence of orbicules on a peritapetal membrane associated with a plasmodial tapetum has been described for Abutilon pictum (Malvaceae) in a previous study. Thus, studies on other species of Malvaceae are necessary to corroborate the presence of such bodies in other members of the family. Pollen and microsporangium development of Modiolastrum malvifolium has been studied in this work. • Methods: Anthers at different stages of development were processed for transmission electron microscopy and light microscopy. Membranes and pollen walls resistant to acetolysis were isolated from whole anthers. • Key Results: Microspore tetrads have a tetrahedral arrangement. Pollen grains are shed at the bicellular stage. The tapetum is invasive, non-syncytial and a peritapetal membrane with orbicules is formed. • Conclusions: This is the first report of the presence of orbicules on a peritapetal membrane in a species with a tapetum of an invasive, non-syncytial type. Taking into consideration all the information on the subject, it can be concluded that the presence of orbicules is not a stable criterion to differentiate between a secretory or plasmodial, or intermediate invasive, non-syncytial tapetum. © The Author 2007. Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved.
publishDate 2007
dc.date.none.fl_str_mv 2007
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/20.500.12110/paper_03057364_v99_n4_p755_Galati
url http://hdl.handle.net/20.500.12110/paper_03057364_v99_n4_p755_Galati
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/2.5/ar
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/2.5/ar
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv Ann. Bot. 2007;99(4):755-763
reponame:Biblioteca Digital (UBA-FCEN)
instname:Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
instacron:UBA-FCEN
reponame_str Biblioteca Digital (UBA-FCEN)
collection Biblioteca Digital (UBA-FCEN)
instname_str Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
instacron_str UBA-FCEN
institution UBA-FCEN
repository.name.fl_str_mv Biblioteca Digital (UBA-FCEN) - Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
repository.mail.fl_str_mv ana@bl.fcen.uba.ar
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