Early reproductive developmental anatomy in Decaisnea (Lardizabalaceae) and its systematic implications

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 城市与区域生态国家重点实验室

	Early reproductive developmental anatomy in Decaisnea (Lardizabalaceae) and its systematic implications
	Wang, Hua-Feng ; Friedman, Cynthia Ross ; Zhu, Zhi-Xin ; Qin, Hai-Ning
刊名	ANNALS OF BOTANY
	2009-11
卷号	104 期号:6 页码:1243-1253
关键词	Decaisnea insignis embryology endosperm Lardizabalaceae microscopy pollen reproductive anatomy systematics
中文摘要	Background and Aims Decaisnea insignis, known as 'dead man's fingers' (Lardizabalaceae), is widely distributed in China and the Himalayan foothill countries. This economically important plant, which is the only species in the genus, has not been the subject of any embryological studies aside from one brief, older paper that lacks micrographs. Data on Decaisnea are also important because its systematic position has been unstable since the genus was established in 1855. Therefore, the objectives of this study were: (a) to use modern microscopy to document early reproductive anatomical development in Decaisnea; and (b) to compare qualitatively these early embryological characters with allied taxa in a systematic context. Methods Decaisnea insignis floral buds and inflorescences were regularly collected from Shaanxi Province, China and prepared for light microscopy. The embryological characters studied were qualitatively compared with those of allied taxa via a thorough examination of the existing literature. Key Results Early reproductive anatomy in Decaisnea was documented and novel revelations made. It was discovered that the pollen is shed when three-celled (not two-celled, as previously reported), and that endosperm formation is nuclear (not cellular or helobial, as previously reported). These two newly revealed embryological characters are not found in any other members of Lardizabalaceae. Furthermore, neither are persistent antipodal cells, which we confirmed to be present in Decaisnea. Conclusions Decaisnea and other Lardizabalaceae characteristically have tetrasporangiate anthers, a secretory tapetum, simultaneous microsporocyte cytokinesis, primarily bitegmic, crassinucellate ovules, and a Polygonum type embryo sac. However, in the family, persistent antipodals, nuclear endosperm, and pollen shed at the three-celled stage are only found in Decaisnea. These embryological data prompted the suggestion that Decaisnea needs elevation above the level of genus.
WOS记录号	WOS:000271106700020
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/21375]
专题	生态环境研究中心_城市与区域生态国家重点实验室
推荐引用方式 GB/T 7714	Wang, Hua-Feng,Friedman, Cynthia Ross,Zhu, Zhi-Xin,et al. Early reproductive developmental anatomy in Decaisnea (Lardizabalaceae) and its systematic implications[J]. ANNALS OF BOTANY,2009,104(6):1243-1253.
APA	Wang, Hua-Feng,Friedman, Cynthia Ross,Zhu, Zhi-Xin,&Qin, Hai-Ning.(2009).Early reproductive developmental anatomy in Decaisnea (Lardizabalaceae) and its systematic implications.ANNALS OF BOTANY,104(6),1243-1253.
MLA	Wang, Hua-Feng,et al."Early reproductive developmental anatomy in Decaisnea (Lardizabalaceae) and its systematic implications".ANNALS OF BOTANY 104.6(2009):1243-1253.