SYSTEMATIC SIGNIFICANCE OF THE DEVELOPMENT AND ANATOMY OF FLOWERS AND FRUIT OF QUERCUS SCHOTTKYANA (SUBGENUS CYCLOBALANOPSIS: FAGACEAE)

doi:10.1086/591976

	SYSTEMATIC SIGNIFICANCE OF THE DEVELOPMENT AND ANATOMY OF FLOWERS AND FRUIT OF QUERCUS SCHOTTKYANA (SUBGENUS CYCLOBALANOPSIS: FAGACEAE)
	Deng, Min; Zhou, Zhe-Kun; Chen, Ya-Qiong; Sun, Wei-Bang
通讯作者	zhouzk@mail.kib.ac.cn
	2008-11-01
发表期刊	INTERNATIONAL JOURNAL OF PLANT SCIENCES
ISSN	1058-5893
卷号	169 期号:9 页码:1261-1277
摘要	The developmental process of flower and fruit production was studied for the first time in Quercus schottkyana (subgenus Cyclobalanopsis) and compared with other species of Quercus and related Fagaceae. Four main developmental periods were recognized, and standard embryological features such as basic type of anther wall formation, simultaneous cytokinesis of microspore mother cells, tetrahedrally arranged microspore tetrads, and two- to three-celled pollen grains. Polygonum type of embryo sac development, delayed fertilization, and free nuclear endosperm were observed in Q. schottkyana and confirmed to be plesiomorphic. In Q. schottkyana, the primary archesporial cell divided into megaspore mother cells without forming a primary parietal cell, a condition that may be derived in Fagaceae. Another possibly derived state observed at an early ovule stage was a pseudocrassinucellate nucellus, defined by ovule epidermis giving rise to the subdermal layer (parietal layer) and archesporial cells directly developing into megaspore mother cells. During seed development, the funiculus was sessile and attached to the middle of an extremely compressed placenta; thus the apical position of aborted ovules in Q. schottkyana can be attributed to the elongation of both the placenta and the funiculus. Comparative studies suggested that the large size of the style at pollination, a hemianatropous ovule, and a sessile funiculus are likely synapomorphies of the genus Quercus. The new data on Q. schottkyana confirm the hypothesis that evolutionary novelty in the development and anatomy of Quercus flowers is mostly found in terminal clades. Two autapomorphies, lateral position of the hilum and lateral originated primary vascular bundle in the seed coat, potentially distinguish subgenus Cyclobalanopsis from other species of Quercus.
关键词	Flower And Fruit Anatomy Quercus Cyclobalanopsis Fagaceae
学科领域	Plant Sciences
DOI	10.1086/591976
收录类别	SCI
语种	英语
WOS记录号	WOS:000261002700012
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/14035
专题	中国科学院东亚植物多样性与生物地理学重点实验室
作者单位	Chinese Acad Sci, Kunming Inst Bot, Lab Biodivers & Biogeog, Kunming 650204, Peoples R China
推荐引用方式 GB/T 7714	Deng, Min,Zhou, Zhe-Kun,Chen, Ya-Qiong,et al. SYSTEMATIC SIGNIFICANCE OF THE DEVELOPMENT AND ANATOMY OF FLOWERS AND FRUIT OF QUERCUS SCHOTTKYANA (SUBGENUS CYCLOBALANOPSIS: FAGACEAE)[J]. INTERNATIONAL JOURNAL OF PLANT SCIENCES,2008,169(9):1261-1277.
APA	Deng, Min,Zhou, Zhe-Kun,Chen, Ya-Qiong,&Sun, Wei-Bang.(2008).SYSTEMATIC SIGNIFICANCE OF THE DEVELOPMENT AND ANATOMY OF FLOWERS AND FRUIT OF QUERCUS SCHOTTKYANA (SUBGENUS CYCLOBALANOPSIS: FAGACEAE).INTERNATIONAL JOURNAL OF PLANT SCIENCES,169(9),1261-1277.
MLA	Deng, Min,et al."SYSTEMATIC SIGNIFICANCE OF THE DEVELOPMENT AND ANATOMY OF FLOWERS AND FRUIT OF QUERCUS SCHOTTKYANA (SUBGENUS CYCLOBALANOPSIS: FAGACEAE)".INTERNATIONAL JOURNAL OF PLANT SCIENCES 169.9(2008):1261-1277.

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