Floral development and the formation of functionally unisexual flowers in Xanthoceras sorbifolium (Sapindaceae), a morphologically andromonoecious tree endemic to northern China

doi:10.1007/s00468-019-01879-6

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	Floral development and the formation of functionally unisexual flowers in Xanthoceras sorbifolium (Sapindaceae), a morphologically andromonoecious tree endemic to northern China
	Zhou, Qingyuan ; Cai, Qing ; Zheng, Yuanrun ; Wu, Zhiyan 1; Mao, Jianfeng 3
刊名	TREES-STRUCTURE AND FUNCTION
	2019
卷号	33 期号:6 页码:1571-1582
关键词	Floral development Andromonoecy Monoecy Systematic relationship Xanthoceras sorbifolium
ISSN号	0931-1890
DOI	10.1007/s00468-019-01879-6
文献子类	Article
英文摘要	Key message Xanthoceras sorbifolium is apparently andromonoecious but exhibits a cryptically monoecious breeding system. Sexual differentiation in male and functional female flowers occurs 2 weeks before flowering. Individual trees of Xanthoceras sorbifolium bear male and morphologically bisexual flowers but functionally female flowers, and show labile sex expression. Investigations of the floral development are of significant value for understanding the breeding system and elucidating the systematic relationships. We studied floral development of male and bisexual flowers using scanning electron and light microscopy. The early stages of floral development were essentially the same, and all floral organ primordia were initiated in the two types of flowers of X. sorbifolium. Later, the stamens in bisexual flowers and the gynoecium in male flowers were aborted. We divided floral development into nine stages. Morphological differences between male and bisexual flowers appeared first at stage 8, when the style elongated obviously and the stigma papillae began to expand in the bisexual flowers but not in the male flowers. Ovule development was arrested shortly after formation of megaspore mother cells or during meiosis in the male flowers, whereas anther development was aberrant in the bisexual flowers. Morphologically bisexual flowers of X. sorbifolium do not have male function and are functionally female. Comparison of floral developmental characters did not support the separation of the Chinese monotypic genus Xanthoceras from the family Sapindaceae.
学科主题	Forestry
电子版国际标准刊号	1432-2285
出版地	HEIDELBERG
WOS关键词	ORGANOGENESIS ; EVOLUTION ; ONTOGENY ; CAESALPINIOIDEAE ; KOELREUTERIA ; PLASTICITY ; EMBRYOLOGY ; CASSIEAE ; FAMILY
WOS研究方向	Forestry
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000494830600004
资助机构	National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [30972344, 31370611, 31570680] ; Beijing Natural Science FoundationBeijing Natural Science Foundation [6172028]
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/19892]
专题	中科院北方资源植物重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, Key Lab Plant Resources, Beijing, Peoples R China 2.Beijing Forestry Univ, Coll Biol Sci & Technol, Beijing, Peoples R China 3.Natl Forestry & Grassland Adm, Shinyleaf Yellowhorn Engn & Technol Res Ctr, Chifeng, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Qingyuan,Cai, Qing,Zheng, Yuanrun,et al. Floral development and the formation of functionally unisexual flowers in Xanthoceras sorbifolium (Sapindaceae), a morphologically andromonoecious tree endemic to northern China[J]. TREES-STRUCTURE AND FUNCTION,2019,33(6):1571-1582.
APA	Zhou, Qingyuan,Cai, Qing,Zheng, Yuanrun,Wu, Zhiyan,&Mao, Jianfeng.(2019).Floral development and the formation of functionally unisexual flowers in Xanthoceras sorbifolium (Sapindaceae), a morphologically andromonoecious tree endemic to northern China.TREES-STRUCTURE AND FUNCTION,33(6),1571-1582.
MLA	Zhou, Qingyuan,et al."Floral development and the formation of functionally unisexual flowers in Xanthoceras sorbifolium (Sapindaceae), a morphologically andromonoecious tree endemic to northern China".TREES-STRUCTURE AND FUNCTION 33.6(2019):1571-1582.