| 观光木的小孢子发生及雄配子体发育的研究 |
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| 引用本文： | 付琳,徐凤霞,曾庆文.观光木的小孢子发生及雄配子体发育的研究[J].热带亚热带植物学报,2009,17(5):419-426. |
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| 作者姓名： | 付琳 徐凤霞 曾庆文 |
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| 作者单位： | 1. 中国科学院华南植物园,广州,510650;中国科学院研究生院,北京,100049
2. 中国科学院华南植物园,广州,510650 |
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| 基金项目： | 国家自然科学基金项目，中国科学院知识创新工程重要方向项目，广东省科技厅科技计划项目，广东省自然科学基金项目 |
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| 摘 要： | 采用石蜡切片法对观光木(Tsoongiodendron odorum Chun)的小孢子发生和雄配子体发育进行了解剖学研究.观光木的花药由花药原基发育而来,具4个小孢子囊,花药壁由表皮、药室内壁、2～3层中层和1～2层绒毡层组成.中层在小孢子四分体时期开始解体,最终消失;绒毡层为腺质绒毡层,细胞具1～2核,在花药发育过程中不断分泌各种物质,提供小孢子发育,直到花粉成熟绒毡层才自溶消失.初生造孢细胞分裂形成次生造孢细胞,次生造孢细胞再转化为小孢子母细胞,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、对称型或"T"型(极少),成熟花粉粒二细胞型,开花时散出.观光木的成熟花粉粒存在严重的败育现象.
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| 关 键 词： | 观光木 木兰科 小孢子发生 雄配子体发育 |
| 收稿时间： | 2008/9/29 0:00:00 |
| 修稿时间： | 2009/4/16 0:00:00 |
Studies on Microsporogenesis and Development of Male Gametophyte in Tsoongiodendron odorum Chun |
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| FU Lin,XU Feng-xia and ZENG Qing-wen.Studies on Microsporogenesis and Development of Male Gametophyte in Tsoongiodendron odorum Chun[J].Journal of Tropical and Subtropical Botany,2009,17(5):419-426. |
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| Authors: | FU Lin XU Feng-xia and ZENG Qing-wen |
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| Institution: | 1.South China Botanical Garden;Chinese Academy of Sciences;Guangzhou 510650;China;2.Graduate University of Chinese Academy of Sciences;Beijing 100049;China |
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| Abstract: | The microsporogenesis and development of male gametophyte in Tsoongiodendron odorum Chun were observed by using the paraffin section method.The anther was tetrasporangiate,originated from the stamen primordium.The anther wall was composed of epidermis,fibrous endothelium,middle layer(2~3 layers) and tapetum(1~2 layers).The middle layers became smaller at the tetrad stage,and disappeared at last.The tapetum was of glandular type,which degenerated to supply the nutrient to the pollens and finally disappeared ... |
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| Keywords: | Tsoongiodendron odorum Chun Magnoliaceae Microsporogenesis Development of male gametophyte |
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