Sporogenesis and development of gametophytes in an endangered plant, Tetracentron sinense Oliv

The sporogenesis and development of gametophytes in Tetracentron sinense Oliv. were studied with light microscopy. The anther has four microsporangia; its primary anther wall consists of an epidermis, an endothecium, one or two middle layers and one glandular tapetum. Simultaneous cytokinesis follow...

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Autores principales:	Gan,Xiaohong, Xie,Dan, Cao,Lingling
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2012
Materias:	Tetracentron sinense Oliv Sporogenesis Development of gametophytes Natural regeneration
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602012000400011
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spelling	oai:scielo:S0716-976020120004000112013-03-15Sporogenesis and development of gametophytes in an endangered plant, Tetracentron sinense OlivGan,XiaohongXie,DanCao,Lingling Tetracentron sinense Oliv Sporogenesis Development of gametophytes Natural regeneration The sporogenesis and development of gametophytes in Tetracentron sinense Oliv. were studied with light microscopy. The anther has four microsporangia; its primary anther wall consists of an epidermis, an endothecium, one or two middle layers and one glandular tapetum. Simultaneous cytokinesis follows meiosis, forming a tetrahedral tetrad. Mature pollen grains are two-celled at the time of anther dehiscence. Its ovule is anatropous, bitegmic and crassinucellate; the development of the female gametophyte is of the monosporic 8-nucleate Polygonum type. Significantly, some striking features were first found in T. sinense: (1) anther dehiscence occurs soon after the endothecium fibrously thickens and the intersporangial septum degenerates; (2) tapetum degeneration is retarded, persisting up to the stage of two-celled pollen grain; (3) a few cellular events such as the vacuolization and the contraction and deformation of the pollen mother cell (PMC) and microspore are not normal at the PMC, dyad and tetrad stages. The abnormalities during male reproduction might be one of important factors resulting in the poor natural regeneration of T. sinense.info:eu-repo/semantics/openAccessSociedad de Biología de ChileBiological Research v.45 n.4 20122012-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602012000400011en10.4067/S0716-97602012000400011
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Tetracentron sinense Oliv Sporogenesis Development of gametophytes Natural regeneration
spellingShingle	Tetracentron sinense Oliv Sporogenesis Development of gametophytes Natural regeneration Gan,Xiaohong Xie,Dan Cao,Lingling Sporogenesis and development of gametophytes in an endangered plant, Tetracentron sinense Oliv
description	The sporogenesis and development of gametophytes in Tetracentron sinense Oliv. were studied with light microscopy. The anther has four microsporangia; its primary anther wall consists of an epidermis, an endothecium, one or two middle layers and one glandular tapetum. Simultaneous cytokinesis follows meiosis, forming a tetrahedral tetrad. Mature pollen grains are two-celled at the time of anther dehiscence. Its ovule is anatropous, bitegmic and crassinucellate; the development of the female gametophyte is of the monosporic 8-nucleate Polygonum type. Significantly, some striking features were first found in T. sinense: (1) anther dehiscence occurs soon after the endothecium fibrously thickens and the intersporangial septum degenerates; (2) tapetum degeneration is retarded, persisting up to the stage of two-celled pollen grain; (3) a few cellular events such as the vacuolization and the contraction and deformation of the pollen mother cell (PMC) and microspore are not normal at the PMC, dyad and tetrad stages. The abnormalities during male reproduction might be one of important factors resulting in the poor natural regeneration of T. sinense.
author	Gan,Xiaohong Xie,Dan Cao,Lingling
author_facet	Gan,Xiaohong Xie,Dan Cao,Lingling
author_sort	Gan,Xiaohong
title	Sporogenesis and development of gametophytes in an endangered plant, Tetracentron sinense Oliv
title_short	Sporogenesis and development of gametophytes in an endangered plant, Tetracentron sinense Oliv
title_full	Sporogenesis and development of gametophytes in an endangered plant, Tetracentron sinense Oliv
title_fullStr	Sporogenesis and development of gametophytes in an endangered plant, Tetracentron sinense Oliv
title_full_unstemmed	Sporogenesis and development of gametophytes in an endangered plant, Tetracentron sinense Oliv
title_sort	sporogenesis and development of gametophytes in an endangered plant, tetracentron sinense oliv
publisher	Sociedad de Biología de Chile
publishDate	2012
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602012000400011
work_keys_str_mv	AT ganxiaohong sporogenesisanddevelopmentofgametophytesinanendangeredplanttetracentronsinenseoliv AT xiedan sporogenesisanddevelopmentofgametophytesinanendangeredplanttetracentronsinenseoliv AT caolingling sporogenesisanddevelopmentofgametophytesinanendangeredplanttetracentronsinenseoliv
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Sporogenesis and development of gametophytes in an endangered plant, Tetracentron sinense Oliv

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