Floral development and anatomy of pistillate flowers of Lophophytum (Balanophoraceae), with special reference to the embryo sac inversion

Autores
Sato, Héctor Arnaldo; González, Ana María
Año de publicación
2016
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Fil: Sato, Héctor Arnaldo. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias; Argentina.
Fil: González, Ana María. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias; Argentina.
Fil: Sato, Héctor Arnaldo. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Botánica del Nordeste; Argentina.
Fil: González, Ana María. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Botánica del Nordeste; Argentina.
The extreme reduction of flowers in the Balanophoraceae has generated few and incomplete studies with scattered and often contradictory results with respect to embryology. Using light and scanning microscopy, gynoecium, ovule and embryo-sac development are described in two (of 4) species of Lopho phytum. The pistillate flower lacks perianth, and it is reduced to one pistil formed by a superior, biloculate ovary and two styles with capitated stigmas. Two ategmic hemianatropous ovules are inserted on the upper portion of a central placental column. The two locules are almost completely obstructed by the ovules. The term micropyle is not applicable in its usual sense, due to the absence of integuments. The term “micropylar pole” instead of micropyle was used to designate the apex of the nucellus, where the megaspore mother cell develops. Vascular supply is missing in the placenta and the ovule, therefore, the chalaza and the funiculus cannot be defined. The point of attachment of the nucellus to the placenta was designated “chalazal pole”. The embryo-sac is Adoxa type. During the migration of the two pairs of nuclei to the opposite poles,the four-nucleate embryo-sac tends to take a “J” shape. Each pair of nuclei undergoes a mitotic division to form an eight-nucleate embryo-sac. In the upper, chalazal pole of the embryo-sac, a typical egg-apparatus with a central egg-cell and two adjacent synergids cells is developed, while in the micropylar pole three antipodes are formed, all that determines an embryo-sac of reversed position. The analysis of the anatomy and development of pistillate flowers and the study of the functional architec ture of ovules, carpels and embryo-sac, provide embryological data of great importance to complement phylogenetic studies in the family Balanophoraceae, and even in order Santalales
Fuente
Flora, 2016, vol. 219, p. 35-47.
Materia
Balanophoraceae
Embryo-sac
Holoparasite
Inversion
Lophophytum leandri
Lophophytum mirabile
Ovule
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
Institución
Universidad Nacional del Nordeste
OAI Identificador
oai:repositorio.unne.edu.ar:123456789/47975

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network_name_str Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
spelling Floral development and anatomy of pistillate flowers of Lophophytum (Balanophoraceae), with special reference to the embryo sac inversionSato, Héctor ArnaldoGonzález, Ana MaríaBalanophoraceaeEmbryo-sacHoloparasiteInversionLophophytum leandriLophophytum mirabileOvuleFil: Sato, Héctor Arnaldo. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias; Argentina.Fil: González, Ana María. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias; Argentina.Fil: Sato, Héctor Arnaldo. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Botánica del Nordeste; Argentina.Fil: González, Ana María. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Botánica del Nordeste; Argentina.The extreme reduction of flowers in the Balanophoraceae has generated few and incomplete studies with scattered and often contradictory results with respect to embryology. Using light and scanning microscopy, gynoecium, ovule and embryo-sac development are described in two (of 4) species of Lopho phytum. The pistillate flower lacks perianth, and it is reduced to one pistil formed by a superior, biloculate ovary and two styles with capitated stigmas. Two ategmic hemianatropous ovules are inserted on the upper portion of a central placental column. The two locules are almost completely obstructed by the ovules. The term micropyle is not applicable in its usual sense, due to the absence of integuments. The term “micropylar pole” instead of micropyle was used to designate the apex of the nucellus, where the megaspore mother cell develops. Vascular supply is missing in the placenta and the ovule, therefore, the chalaza and the funiculus cannot be defined. The point of attachment of the nucellus to the placenta was designated “chalazal pole”. The embryo-sac is Adoxa type. During the migration of the two pairs of nuclei to the opposite poles,the four-nucleate embryo-sac tends to take a “J” shape. Each pair of nuclei undergoes a mitotic division to form an eight-nucleate embryo-sac. In the upper, chalazal pole of the embryo-sac, a typical egg-apparatus with a central egg-cell and two adjacent synergids cells is developed, while in the micropylar pole three antipodes are formed, all that determines an embryo-sac of reversed position. The analysis of the anatomy and development of pistillate flowers and the study of the functional architec ture of ovules, carpels and embryo-sac, provide embryological data of great importance to complement phylogenetic studies in the family Balanophoraceae, and even in order SantalalesElsevier2016-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfSato, Héctor Arnaldo y González, Ana María, 2016. Floral development and anatomy of pistillate flowers of Lophophytum (Balanophoraceae), with special reference to the embryo sac inversión. Flora. Ámsterdam: Elsevier, vol. 2019, p. 35-47. ISSN 0367-2530.0367-2530http://repositorio.unne.edu.ar/handle/123456789/47975Flora, 2016, vol. 219, p. 35-47.reponame:Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)instname:Universidad Nacional del Nordesteenghttps://www.sciencedirect.com/science/article/abs/pii/S0367253016000049?via%3Dihubinfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/2.5/ar/Atribución-NoComercial-SinDerivadas 2.5 Argentina2025-09-04T11:13:01Zoai:repositorio.unne.edu.ar:123456789/47975instacron:UNNEInstitucionalhttp://repositorio.unne.edu.ar/Universidad públicaNo correspondehttp://repositorio.unne.edu.ar/oaiososa@bib.unne.edu.ar;sergio.alegria@unne.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:48712025-09-04 11:13:02.142Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) - Universidad Nacional del Nordestefalse
dc.title.none.fl_str_mv Floral development and anatomy of pistillate flowers of Lophophytum (Balanophoraceae), with special reference to the embryo sac inversion
title Floral development and anatomy of pistillate flowers of Lophophytum (Balanophoraceae), with special reference to the embryo sac inversion
spellingShingle Floral development and anatomy of pistillate flowers of Lophophytum (Balanophoraceae), with special reference to the embryo sac inversion
Sato, Héctor Arnaldo
Balanophoraceae
Embryo-sac
Holoparasite
Inversion
Lophophytum leandri
Lophophytum mirabile
Ovule
title_short Floral development and anatomy of pistillate flowers of Lophophytum (Balanophoraceae), with special reference to the embryo sac inversion
title_full Floral development and anatomy of pistillate flowers of Lophophytum (Balanophoraceae), with special reference to the embryo sac inversion
title_fullStr Floral development and anatomy of pistillate flowers of Lophophytum (Balanophoraceae), with special reference to the embryo sac inversion
title_full_unstemmed Floral development and anatomy of pistillate flowers of Lophophytum (Balanophoraceae), with special reference to the embryo sac inversion
title_sort Floral development and anatomy of pistillate flowers of Lophophytum (Balanophoraceae), with special reference to the embryo sac inversion
dc.creator.none.fl_str_mv Sato, Héctor Arnaldo
González, Ana María
author Sato, Héctor Arnaldo
author_facet Sato, Héctor Arnaldo
González, Ana María
author_role author
author2 González, Ana María
author2_role author
dc.subject.none.fl_str_mv Balanophoraceae
Embryo-sac
Holoparasite
Inversion
Lophophytum leandri
Lophophytum mirabile
Ovule
topic Balanophoraceae
Embryo-sac
Holoparasite
Inversion
Lophophytum leandri
Lophophytum mirabile
Ovule
dc.description.none.fl_txt_mv Fil: Sato, Héctor Arnaldo. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias; Argentina.
Fil: González, Ana María. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias; Argentina.
Fil: Sato, Héctor Arnaldo. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Botánica del Nordeste; Argentina.
Fil: González, Ana María. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Botánica del Nordeste; Argentina.
The extreme reduction of flowers in the Balanophoraceae has generated few and incomplete studies with scattered and often contradictory results with respect to embryology. Using light and scanning microscopy, gynoecium, ovule and embryo-sac development are described in two (of 4) species of Lopho phytum. The pistillate flower lacks perianth, and it is reduced to one pistil formed by a superior, biloculate ovary and two styles with capitated stigmas. Two ategmic hemianatropous ovules are inserted on the upper portion of a central placental column. The two locules are almost completely obstructed by the ovules. The term micropyle is not applicable in its usual sense, due to the absence of integuments. The term “micropylar pole” instead of micropyle was used to designate the apex of the nucellus, where the megaspore mother cell develops. Vascular supply is missing in the placenta and the ovule, therefore, the chalaza and the funiculus cannot be defined. The point of attachment of the nucellus to the placenta was designated “chalazal pole”. The embryo-sac is Adoxa type. During the migration of the two pairs of nuclei to the opposite poles,the four-nucleate embryo-sac tends to take a “J” shape. Each pair of nuclei undergoes a mitotic division to form an eight-nucleate embryo-sac. In the upper, chalazal pole of the embryo-sac, a typical egg-apparatus with a central egg-cell and two adjacent synergids cells is developed, while in the micropylar pole three antipodes are formed, all that determines an embryo-sac of reversed position. The analysis of the anatomy and development of pistillate flowers and the study of the functional architec ture of ovules, carpels and embryo-sac, provide embryological data of great importance to complement phylogenetic studies in the family Balanophoraceae, and even in order Santalales
description Fil: Sato, Héctor Arnaldo. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias; Argentina.
publishDate 2016
dc.date.none.fl_str_mv 2016-03
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 Sato, Héctor Arnaldo y González, Ana María, 2016. Floral development and anatomy of pistillate flowers of Lophophytum (Balanophoraceae), with special reference to the embryo sac inversión. Flora. Ámsterdam: Elsevier, vol. 2019, p. 35-47. ISSN 0367-2530.
0367-2530
http://repositorio.unne.edu.ar/handle/123456789/47975
identifier_str_mv Sato, Héctor Arnaldo y González, Ana María, 2016. Floral development and anatomy of pistillate flowers of Lophophytum (Balanophoraceae), with special reference to the embryo sac inversión. Flora. Ámsterdam: Elsevier, vol. 2019, p. 35-47. ISSN 0367-2530.
0367-2530
url http://repositorio.unne.edu.ar/handle/123456789/47975
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://www.sciencedirect.com/science/article/abs/pii/S0367253016000049?via%3Dihub
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Atribución-NoComercial-SinDerivadas 2.5 Argentina
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Atribución-NoComercial-SinDerivadas 2.5 Argentina
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv Flora, 2016, vol. 219, p. 35-47.
reponame:Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
instname:Universidad Nacional del Nordeste
reponame_str Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
collection Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
instname_str Universidad Nacional del Nordeste
repository.name.fl_str_mv Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) - Universidad Nacional del Nordeste
repository.mail.fl_str_mv ososa@bib.unne.edu.ar;sergio.alegria@unne.edu.ar
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