| 广西含笑的小孢子发生及雄配子体形成的研究 |
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| 引用本文： | 付 琳,徐凤霞,曾庆文,朱开甫.广西含笑的小孢子发生及雄配子体形成的研究[J].广西植物,2011,31(3):312-317. |
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| 作者姓名： | 付 琳 徐凤霞 曾庆文 朱开甫 |
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| 作者单位： | 1. 中国科学院,华南植物园,广州,510650
2. 徐闻县神州木兰园培植中心,广东,湛江,524100 |
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| 基金项目： | 国家自然科学基金，广东省教育部产学研结合项目，广东省科技计划项目 |
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| 摘 要： | 对广西含笑的小孢子发生和雄配子体形成过程进行了解剖学研究.广西含笑的花药具4个花粉囊,花药壁由表皮、药室内壁、中层(3～5层)和绒毡层(1～2层)组成.绒毡层为腺质绒毡层,细胞具2至多核,到花粉成熟时自溶消失.小孢子母细胞减数分裂的胞质分裂为修饰性同时型,四分体排列方式为交叉型、对称型、"T"型(极少),成熟花粉粒具单...
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| 关 键 词： | 广西含笑 木兰科 小孢子发生 雄配子体形成 |
Studies of microsporogenesis and male gametophyte
formation of Michelia guangxiensis |
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| FU Lin,XU Feng-Xi,ZENG Qing-Wen,ZHU Kai-Fu.Studies of microsporogenesis and male gametophyte
formation of Michelia guangxiensis[J].Guihaia,2011,31(3):312-317. |
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| Authors: | FU Lin XU Feng-Xi ZENG Qing-Wen ZHU Kai-Fu |
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| Institution: | 1.South China Botanical Garden, the Chinese Academy of Sciences, Guangzhou 510650, China;
2.Shenzhou Magnolia Garden and Breeding Center of Xuwen, Zhanjiang 524100, China |
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| Abstract: | Microsporogenesis and male gametophyte formation of Michelia guangxiensis were first observed in this paper.Anthers are tetrasporangiate and anther wall is composed of epidermis,fibrous endothecium,middle layer(3-5 layers)and tapetum(1-2 layers).The tapetum is of glandular type with 2 or more nucleus,which degenerate and finally disappear when the pollens are mature.Cytokinesis in meiosis is modified simultaneous type,resulting in decussate,isobilateral or T-shaped(rarely)tetrads.Pollen is monocolpate and sheds at the 2-cell stage.Among the 200 samples,the microspore mother cells in 30% anthers degenerate before meiosis and the microspores in 40% anthers degenerate seriously.The highest pollen germination rate is 25% only. |
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| Keywords: | Magnoliaceae Michelia guangxiensis microsporogenesis male gametophyte formation |
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