Microsporogenesis and microgametogenesis of Excentrodendron hsienmu (Malvaceae s.l.) and their systematic implications

	Microsporogenesis and microgametogenesis of Excentrodendron hsienmu (Malvaceae s.l.) and their systematic implications
	Tang, Y ; Gao, H ; Wang, CM ; Chen, JZ
刊名	BOTANICAL JOURNAL OF THE LINNEAN SOCIETY
	2006
卷号	150 期号:4 页码:447_457
关键词	dioecy Dombeyeae flowering cycle Malvales Pterospermum
ISSN号	0024-4074
通讯作者	Tang, Y, Sichuan Univ, Dept Environm Sci, 24,South Sect 1,1st Ring Rd, Chengdu 610065, Sichuan, Peoples R China.
中文摘要	Flowers, microsporogenesis and microgametogenesis of Excentrodendron hsienmu in opening-functional flowers and non-opening flowers were studied to investigate the evolutionary relationships of Excentrodendron. E. hsienmu is a dioecious species that blossoms every 3-4 years, although large numbers of flower buds develop every year. The anther is tetrasporangiate, the tapetum is of the secretory type, the microspore tetrads are mainly tetrahedral, and the pollen grains are two-celled when shed. Four to six microsporocytes are seen on the transverse section of the anthers, and cytokinesis is simultaneous. The development of the anther wall conforms to the basic type and the anther wall is five or six cells thick, with a fibrous endothecium. The difference between the opening-functional and the non-opening flowers is mainly in the thickness of the anther wall. Early megasporogenesis in staminate flowers up to megaspore mother cell or megaspore tetrads has been observed. Excentrodendron shares with Dombeyeae only plesiomorphic features, but differs in anther wall development type and thickness. Most features of Excentrodendron are shared with Pterospermum, including such synapomorphic features as basic type of anther wall development, five- to six-cell-thick anther wall, biseriate tapetum at some places, and degeneration of microsporocytes, suggesting placement near Pterospermum. (c) 2006 The Linnean Society of London.
学科主题	Plant Sciences
收录类别	SCI
语种	英语
公开日期	2011-07-08
内容类型	期刊论文
源URL	[http://210.75.237.14/handle/351003/21878]
专题	成都生物研究所_生态研究
推荐引用方式 GB/T 7714	Tang, Y,Gao, H,Wang, CM,et al. Microsporogenesis and microgametogenesis of Excentrodendron hsienmu (Malvaceae s.l.) and their systematic implications[J]. BOTANICAL JOURNAL OF THE LINNEAN SOCIETY,2006,150(4):447_457.
APA	Tang, Y,Gao, H,Wang, CM,&Chen, JZ.(2006).Microsporogenesis and microgametogenesis of Excentrodendron hsienmu (Malvaceae s.l.) and their systematic implications.BOTANICAL JOURNAL OF THE LINNEAN SOCIETY,150(4),447_457.
MLA	Tang, Y,et al."Microsporogenesis and microgametogenesis of Excentrodendron hsienmu (Malvaceae s.l.) and their systematic implications".BOTANICAL JOURNAL OF THE LINNEAN SOCIETY 150.4(2006):447_457.