Floral morphology and embryo sac development in Burretiodendron kydiifolium Y. C. Hsu et R. Zhuge (Tiliaceae) and their systematic significance

	Floral morphology and embryo sac development in Burretiodendron kydiifolium Y. C. Hsu et R. Zhuge (Tiliaceae) and their systematic significance
	Tang, YA
刊名	BOTANICAL JOURNAL OF THE LINNEAN SOCIETY
	1998
卷号	128 期号:2 页码:149_158
关键词	functionally unisexual flowers Malvales megagametogenesis Polygonum embryo sac Pterospermum
ISSN号	0024-4074
通讯作者	Tang, YA, Int Ctr Integrated Mt Dev, GPO Box 3226, Kathmandu, Nepal.
中文摘要	Floral morphology and development of megaspore and megagametophyte in Burretiodendron kydiifolium are described. The ovule is anatropous, crassinucellate and bitegmic. The archesporium is multicellular and usually two cells develop to megasporocytes. The tetrad is linear or very rarely T-shaped. The chalazal megaspore functions and develops into a Polygonum-type of embryo sac. The antipodals degenerate very early and the fertilizable embryo sac consists of only one egg cell, two synergids and two polar nuclei. In a fertilizable embryo sac the micropyle is formed by both outer and inner integuments, which are three to four and five cells thick, respectively. The epidermal cells of the nucellus divide to form a nucellar cap. A group of special cells with large nuclei and less staining are observed below the sporogeneous cells. Comparison of the embryological features of Burretiodendron s.s. with those of Tiliaceae indicates that this genus differs greatly from other members of Tiliaceae and no close relationship is established among Burretiodendron and other tiliaceous taxa. Most embryological features of Burretiodendron are shared by the genus Pterospermum of Sterculiaceae although they differ considerably in gross morphology. (C) 1998 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/351003/21090]
专题	成都生物研究所_生态研究
推荐引用方式 GB/T 7714	Tang, YA. Floral morphology and embryo sac development in Burretiodendron kydiifolium Y. C. Hsu et R. Zhuge (Tiliaceae) and their systematic significance[J]. BOTANICAL JOURNAL OF THE LINNEAN SOCIETY,1998,128(2):149_158.
APA	Tang, YA.(1998).Floral morphology and embryo sac development in Burretiodendron kydiifolium Y. C. Hsu et R. Zhuge (Tiliaceae) and their systematic significance.BOTANICAL JOURNAL OF THE LINNEAN SOCIETY,128(2),149_158.
MLA	Tang, YA."Floral morphology and embryo sac development in Burretiodendron kydiifolium Y. C. Hsu et R. Zhuge (Tiliaceae) and their systematic significance".BOTANICAL JOURNAL OF THE LINNEAN SOCIETY 128.2(1998):149_158.