Ovule and female gametophyte in representatives of Nymphaeasubgenus Hydrocallis and Victoria (Nymphaeaceae; Nymphaeoideae)

Mostrar todas las versiones(3)

Nymphaeaceae occupies an important phylogenetic position because of their placement as one of the basal angiosperms. From this perspective, morphological studies in the family are of great value to under- standing plant phylogeny and evolution. Ovule development and female gametophyte in Nymphaea am...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Zini, Lucía Melisa, Galati, Beatriz Gloria, Ferrucci, María Silvia
Formato: Artículo
Lenguaje:Inglés
Publicado: Elsevier 2023
Materias:
Ovule development
Megasporogenesis
Female gametophyte
Nymphaea
Victoria
Acceso en línea:http://repositorio.unne.edu.ar/handle/123456789/51270
Aporte de:
RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) de Universidad Nacional del Nordeste
id I48-R184-123456789-51270
record_format dspace
spelling I48-R184-123456789-512702024-10-10T13:04:55Z Ovule and female gametophyte in representatives of Nymphaeasubgenus Hydrocallis and Victoria (Nymphaeaceae; Nymphaeoideae) Zini, Lucía Melisa Galati, Beatriz Gloria Ferrucci, María Silvia Ovule development Megasporogenesis Female gametophyte Nymphaea Victoria Nymphaeaceae occupies an important phylogenetic position because of their placement as one of the basal angiosperms. From this perspective, morphological studies in the family are of great value to under- standing plant phylogeny and evolution. Ovule development and female gametophyte in Nymphaea amazonum, N. gardneriana (subgenus Hydrocallis) and in Victoria cruziana were analyzed in order to provide further progress in characters of potential evolutionary interest. The ovules of all species are ana-tropous, bitegmic, distomic, weakly crasinucellate, and present an epistase. The female gametophyte is four-celled and corresponds to the Schisandra type, distinctive of the Nymphaeales. Comparisons among ovules ofthe subgenera of Nymphaea and others allied genera show differences with respectto micropyle conformation, thickness of nucellus and outer integument, and its degree of development on the raphalside. The studied species of Nymphaea share an annular outer integument and linear triad of megas-pores. These results fill gaps in the current incomplete knowledge of character states especially within Nymphaea. In subgenus Hydrocallis, the ovules have an outer integument not markedly cup-shaped incontrast to subgenus Nymphaea, since the micropyle is closer to the funiculus as in Nuphar. The present observations suggest that the ovule morphology has diversified in Nymphaea and the characters studied clearly show no evidences to support the hypothesis of a monophyletic genus. 2023-04-10T15:18:01Z 2023-04-10T15:18:01Z 2014 Artículo Zini, Lucía Melisa, Galati, Beatriz Gloria y Ferrucci, María Silvia, 2014. Ovule and female gametophyte in representatives of Nymphaea subgenus Hydrocallis and Victoria (Nymphaeaceae; Nymphaeoideae). Aquatic Botany. Berlín: Elsevier, vol. 120, p. 322-332. ISSN 0304-3770. 0304-3770 http://repositorio.unne.edu.ar/handle/123456789/51270 eng https://www.sciencedirect.com/science/article/abs/pii/S0304377014001521?via%3Dihub openAccess http://creativecommons.org/licenses/by-nc-nd/2.5/ar/ application/pdf p. 322-332 application/pdf Elsevier Aquatic Botany, 2014, vol. 120, p. 322-332.
institution Universidad Nacional del Nordeste
institution_str I-48
repository_str R-184
collection RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
language Inglés
topic Ovule development
Megasporogenesis
Female gametophyte
Nymphaea
Victoria
spellingShingle Ovule development
Megasporogenesis
Female gametophyte
Nymphaea
Victoria
Zini, Lucía Melisa
Galati, Beatriz Gloria
Ferrucci, María Silvia
Ovule and female gametophyte in representatives of Nymphaeasubgenus Hydrocallis and Victoria (Nymphaeaceae; Nymphaeoideae)
topic_facet Ovule development
Megasporogenesis
Female gametophyte
Nymphaea
Victoria
description Nymphaeaceae occupies an important phylogenetic position because of their placement as one of the basal angiosperms. From this perspective, morphological studies in the family are of great value to under- standing plant phylogeny and evolution. Ovule development and female gametophyte in Nymphaea amazonum, N. gardneriana (subgenus Hydrocallis) and in Victoria cruziana were analyzed in order to provide further progress in characters of potential evolutionary interest. The ovules of all species are ana-tropous, bitegmic, distomic, weakly crasinucellate, and present an epistase. The female gametophyte is four-celled and corresponds to the Schisandra type, distinctive of the Nymphaeales. Comparisons among ovules ofthe subgenera of Nymphaea and others allied genera show differences with respectto micropyle conformation, thickness of nucellus and outer integument, and its degree of development on the raphalside. The studied species of Nymphaea share an annular outer integument and linear triad of megas-pores. These results fill gaps in the current incomplete knowledge of character states especially within Nymphaea. In subgenus Hydrocallis, the ovules have an outer integument not markedly cup-shaped incontrast to subgenus Nymphaea, since the micropyle is closer to the funiculus as in Nuphar. The present observations suggest that the ovule morphology has diversified in Nymphaea and the characters studied clearly show no evidences to support the hypothesis of a monophyletic genus.
format Artículo
author Zini, Lucía Melisa
Galati, Beatriz Gloria
Ferrucci, María Silvia
author_facet Zini, Lucía Melisa
Galati, Beatriz Gloria
Ferrucci, María Silvia
author_sort Zini, Lucía Melisa
title Ovule and female gametophyte in representatives of Nymphaeasubgenus Hydrocallis and Victoria (Nymphaeaceae; Nymphaeoideae)
title_short Ovule and female gametophyte in representatives of Nymphaeasubgenus Hydrocallis and Victoria (Nymphaeaceae; Nymphaeoideae)
title_full Ovule and female gametophyte in representatives of Nymphaeasubgenus Hydrocallis and Victoria (Nymphaeaceae; Nymphaeoideae)
title_fullStr Ovule and female gametophyte in representatives of Nymphaeasubgenus Hydrocallis and Victoria (Nymphaeaceae; Nymphaeoideae)
title_full_unstemmed Ovule and female gametophyte in representatives of Nymphaeasubgenus Hydrocallis and Victoria (Nymphaeaceae; Nymphaeoideae)
title_sort ovule and female gametophyte in representatives of nymphaeasubgenus hydrocallis and victoria (nymphaeaceae; nymphaeoideae)
publisher Elsevier
publishDate 2023
url http://repositorio.unne.edu.ar/handle/123456789/51270
work_keys_str_mv AT ziniluciamelisa ovuleandfemalegametophyteinrepresentativesofnymphaeasubgenushydrocallisandvictorianymphaeaceaenymphaeoideae
AT galatibeatrizgloria ovuleandfemalegametophyteinrepresentativesofnymphaeasubgenushydrocallisandvictorianymphaeaceaenymphaeoideae
AT ferruccimariasilvia ovuleandfemalegametophyteinrepresentativesofnymphaeasubgenushydrocallisandvictorianymphaeaceaenymphaeoideae
_version_ 1832345561208979456

Ejemplares similares