Floral development of Phyllanthus chekiangensis (Phyllanthaceae), with special reference to androecium and gynoecium

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	Floral development of Phyllanthus chekiangensis (Phyllanthaceae), with special reference to androecium and gynoecium
	Ye, Qi-gang; Endress, Peter K.; Wang, Heng-chang; Zhang, Zi-gang; Meng, Ai-ping; Li, Jian-qiang
刊名	PLANT SYSTEMATICS AND EVOLUTION
	2012
英文摘要	The floral development of Phyllanthus chekiangensis has been studied by scanning electron microscopy. The perianth organs are initiated in two whorls, dimerous in male flowers and trimerous in female flowers, with a longer plastochron between whorls than between the organs within a whorl. Male flowers have two stamens. The prominent connective protrusions begin development simultaneously with the floral disk. The disk is two-lobed in male flowers but continuous in female flowers. In female flowers, the developing gynoecium remains open relatively long, so the developing ovules are visible from the outside for some time. The direction of the hemitropous ovules in the carpels is antitropous (epitropous). Two small obturators are formed per carpel, one above each ovule. The prominent nucellar beak extends far beyond the "micropyle". A micropyle in the classical sense formed by integuments closing over the nucellus apex is not present at any stage of development. Thus, it is not correct to say that the nucellar beak "grows through the micropyle". The exposed nucellar beak continues the curvature of the antitropous (epitropous) ovule and becomes contiguous with the obturator. The unusual length of the nucellar beak may be a potential synapomorphy of the enlarged Phyllanthus clade as inferred from molecular phylogenetics.
内容类型	期刊论文
源URL	[http://202.127.146.157/handle/2RYDP1HH/745]
专题	中国科学院武汉植物园
推荐引用方式 GB/T 7714	Ye, Qi-gang,Endress, Peter K.,Wang, Heng-chang,et al. Floral development of Phyllanthus chekiangensis (Phyllanthaceae), with special reference to androecium and gynoecium[J]. PLANT SYSTEMATICS AND EVOLUTION,2012.
APA	Ye, Qi-gang,Endress, Peter K.,Wang, Heng-chang,Zhang, Zi-gang,Meng, Ai-ping,&Li, Jian-qiang.(2012).Floral development of Phyllanthus chekiangensis (Phyllanthaceae), with special reference to androecium and gynoecium.PLANT SYSTEMATICS AND EVOLUTION.
MLA	Ye, Qi-gang,et al."Floral development of Phyllanthus chekiangensis (Phyllanthaceae), with special reference to androecium and gynoecium".PLANT SYSTEMATICS AND EVOLUTION (2012).