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观光木的大孢子发生与雌配子体形成
引用本文:唐源江,叶秀麟,曾庆文,刘玉壶.观光木的大孢子发生与雌配子体形成[J].热带亚热带植物学报,2003,11(1):20-22.
作者姓名:唐源江  叶秀麟  曾庆文  刘玉壶
作者单位:中国科学院华南植物研究所,广东,广州,510650
基金项目:国家自然科学基金资助(30070084),广东省环保局项目(970165)。
摘    要:对观光木(Tsoongiodendron odorum Chun)的大孢子发生,雌配子体形成过程的观察结果显示,观光木子房单心皮,心皮腹面壁上着生2-5个胚珠;胚珠倒生型,厚珠心,两层珠被;孢原细胞一个,并且自表皮下1-2层处分化。胚囊发育为蓼型。在四分体和成熟胚囊时期观察到了异常发育现象。初步探讨了观光木濒危的生殖生物学原因。

关 键 词:大孢子发生  雌配子体  木兰科  观光木
文章编号:1005-3395(2003)01-0020-03

Studies on Megasporogenesis and Development of Female Gametophyte in Tsoongiodendron odorum
TANG Yuan-jiang,YE Xiu-lin,ZENG Qing-wen,LAW Yuh-wu.Studies on Megasporogenesis and Development of Female Gametophyte in Tsoongiodendron odorum[J].Journal of Tropical and Subtropical Botany,2003,11(1):20-22.
Authors:TANG Yuan-jiang  YE Xiu-lin  ZENG Qing-wen  LAW Yuh-wu
Abstract:Megasporogenesis and the development of female gametophyte in endang er ed Tsoongidendron odorum Chun were studied. The results show ed that there were 2-5 ovules on the ventral surface of unicarpellate ovar y wal l. Ovules were anatropous, bitegminous and crassinucellar. Archesporial ce ll was one cell and differentiated from cell in the first or second layer benea th epid ermis. The development of the embryo sac conformed to the Polygonum type . Abnorm al development was observed at tetrad and mature embryo sac. Abnormal p henomena in the process of reproduction of Tsoongiodendron od orum ca using this species to be endangered are discussed
Keywords:Tsoongiodendron odorum  Megasporogenesis  Female  gametophyte
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