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题名: Sporogenesis and gametogenesis in Sladenia and their systematic implication
作者: Li, L; Liang, HX; null(彭华); Lei, LG
刊名: BOTANICAL JOURNAL OF THE LINNEAN SOCIETY
关键词: actinidiaceae ; anther wall development ; dilleniaceae ; embryology ; Ericales s.l. ; ovule development ; Ternstroemiaceae ; Theaceae s.s.
英文摘要: Sporogenesis and gametogenesis in the monotypic genus Sladenia is reported for the first time. The anther wall is of the monocotyledonous type of formation and consists of four-layers, namely a glandular tapetum, one middle layer, an endothecium, and an epidermis. Fibrous thickenings are developed in the epidermis at or near the stage of anther maturity rather than in the endothecium. Successive cytokinesis in microsporogenesis results in tetrahedral or rarely isobilateral tetrads of microspores. Pollen grains are two-celled when shed. The ovule is bitegmic, tenuinucellate, and anatropous. The nucellus degenerates during meiosis of the megaspore mother cell. The micropyle is formed by only the inner integument. Development of the female gametophyte conforms to the Adoxa type. Sladenia has been treated either as a member of Actinidiaceae, Dilleniaceae or Theaceae s.l., or as belonging to an independent family, Sladeniaceae. Recent molecular studies have suggested that it belongs to Ternstroemiaceae within the Ericales s.l. Several noteworthy embryological characters are distinct from those of the other putatively related families and support the recognition of a separate family, Sladeniaceae. Additional embryological evidence confirms this conclusion. (C) 2003 The Linnean Society of London, Botanical Journal of the Linnean Society, 2003.
出版日期: 2003-11-01
卷号: 143, 期号:3, 页码:305-314
语种: 英语
ISSN号: 0024-4074
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内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/3134
Appears in Collections:中国科学院东亚植物多样性与生物地理学重点实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Kunming Inst Bot, Kunming 650204, Yunnan, Peoples R China

Recommended Citation:
Li, L; Liang, HX; Peng, H; Lei, LG.Sporogenesis and gametogenesis in Sladenia and their systematic implication,BOTANICAL JOURNAL OF THE LINNEAN SOCIETY,2003,143(3):305-314
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