Microsporogenesis and microgametogenesis of the Argentinian species of Podocarpus (Podocarpaceae)

The development of the microsporangium and male gametophyte of three species of Podocarpus was studied with light microscopy (LM) and the morphology of pollen with scanning and transmission electron microscopy (SEM and TEM). During early stages, the male cone is covered with coriaceous scales. The a...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autor principal:	del Fueyo, Georgina Marisa
Publicado:	1996
Materias:	anatomy conifers development male gametophyte microsporangium ultrastructure Coniferophyta Podocarpaceae Podocarpus
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00244074_v122_n2_p171_DelFueyo http://hdl.handle.net/20.500.12110/paper_00244074_v122_n2_p171_DelFueyo
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_00244074_v122_n2_p171_DelFueyo
record_format	dspace
spelling	paper:paper_00244074_v122_n2_p171_DelFueyo2023-06-08T14:52:18Z Microsporogenesis and microgametogenesis of the Argentinian species of Podocarpus (Podocarpaceae) del Fueyo, Georgina Marisa anatomy conifers development male gametophyte microsporangium ultrastructure Coniferophyta Podocarpaceae Podocarpus The development of the microsporangium and male gametophyte of three species of Podocarpus was studied with light microscopy (LM) and the morphology of pollen with scanning and transmission electron microscopy (SEM and TEM). During early stages, the male cone is covered with coriaceous scales. The archesporial cells go through a dormant period. Later the pollen mother cells differentiate and undergo meiosis. Callose is detected around the tetrad and between each monad. The microspore nucleus divides several times to give rise to a multicellular gametophyte, which includes the tube cell, the stalk and body cells, and four prothallial cells. The exine of the pollen grain is rugulate in the corpus and quite smooth in the sacci. The ultrastructure of the pollen wall consists of the alveolate sexine, the laminate nexine I and the amorphous nexine II. The intine is very thin. Comparison of the mature grain of some fossils with living members of the Podocarpaceae reveals great similarity. Fil:Del Fueyo, G.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1996 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00244074_v122_n2_p171_DelFueyo http://hdl.handle.net/20.500.12110/paper_00244074_v122_n2_p171_DelFueyo
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	anatomy conifers development male gametophyte microsporangium ultrastructure Coniferophyta Podocarpaceae Podocarpus
spellingShingle	anatomy conifers development male gametophyte microsporangium ultrastructure Coniferophyta Podocarpaceae Podocarpus del Fueyo, Georgina Marisa Microsporogenesis and microgametogenesis of the Argentinian species of Podocarpus (Podocarpaceae)
topic_facet	anatomy conifers development male gametophyte microsporangium ultrastructure Coniferophyta Podocarpaceae Podocarpus
description	The development of the microsporangium and male gametophyte of three species of Podocarpus was studied with light microscopy (LM) and the morphology of pollen with scanning and transmission electron microscopy (SEM and TEM). During early stages, the male cone is covered with coriaceous scales. The archesporial cells go through a dormant period. Later the pollen mother cells differentiate and undergo meiosis. Callose is detected around the tetrad and between each monad. The microspore nucleus divides several times to give rise to a multicellular gametophyte, which includes the tube cell, the stalk and body cells, and four prothallial cells. The exine of the pollen grain is rugulate in the corpus and quite smooth in the sacci. The ultrastructure of the pollen wall consists of the alveolate sexine, the laminate nexine I and the amorphous nexine II. The intine is very thin. Comparison of the mature grain of some fossils with living members of the Podocarpaceae reveals great similarity.
author	del Fueyo, Georgina Marisa
author_facet	del Fueyo, Georgina Marisa
author_sort	del Fueyo, Georgina Marisa
title	Microsporogenesis and microgametogenesis of the Argentinian species of Podocarpus (Podocarpaceae)
title_short	Microsporogenesis and microgametogenesis of the Argentinian species of Podocarpus (Podocarpaceae)
title_full	Microsporogenesis and microgametogenesis of the Argentinian species of Podocarpus (Podocarpaceae)
title_fullStr	Microsporogenesis and microgametogenesis of the Argentinian species of Podocarpus (Podocarpaceae)
title_full_unstemmed	Microsporogenesis and microgametogenesis of the Argentinian species of Podocarpus (Podocarpaceae)
title_sort	microsporogenesis and microgametogenesis of the argentinian species of podocarpus (podocarpaceae)
publishDate	1996
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00244074_v122_n2_p171_DelFueyo http://hdl.handle.net/20.500.12110/paper_00244074_v122_n2_p171_DelFueyo
work_keys_str_mv	AT delfueyogeorginamarisa microsporogenesisandmicrogametogenesisoftheargentinianspeciesofpodocarpuspodocarpaceae
_version_	1768542398161354752

Microsporogenesis and microgametogenesis of the Argentinian species of Podocarpus (Podocarpaceae)

Ejemplares similares