| 濒危植物红花木莲小孢子发生及雄配子体发育的研究 |
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| 引用本文： | 潘跃芝,龚洵,梁汉兴.濒危植物红花木莲小孢子发生及雄配子体发育的研究[J].云南植物研究,2001,23(1):85-90,T006,T007. |
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| 作者姓名： | 潘跃芝 龚洵 梁汉兴 |
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| 作者单位： | 中国科学院昆明植物研究所, |
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| 基金项目： | 中国科学院“西部之光”人才培养计划、云南省科委自然科学基金及中国科学院知识创新工程资助项目 |
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| 摘 要： | 首次报道了木莲属胚胎学特性，研究了红花木莲Manglietia insignis(Wall.)Bl.的小孢子发生、雄配子体的发育以及花粉萌发情况，红花木莲花药具有４个小孢子囊。花药壁５－６层，腺质绒毡层具有２－层细胞，小孢减数分裂后胞质分裂为修性同时型；四个分体排列方式为交叉型或左右对称型，偶为直线型；成熟花粉为二细胞型花粉粒，同时报道了化粉木莲在小孢子发生过程中的特有的现象，花粉萌发率为１４．７％－２５．３％。联系红花木莲花粉粒数目和胚珠数目进行探讨，认为雄配子体发育不是影响红花木莲结籽率低的主要因素。
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| 关 键 词： | 红花木莲 小孢子发生 雄配子体发育 濒危植物 木兰科 |
| 文章编号： | 0253-2700(2001)01-0085-08 |
Studies on the Formation
of Microspores and Development of Male |
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| PAN Yue-Zhi,GONG Xun,LIANG Han-Xing.Studies on the Formation
of Microspores and Development of Male[J].Acta Botanica Yunnanica,2001,23(1):85-90,T006,T007. |
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| Authors: | PAN Yue-Zhi GONG Xun LIANG Han-Xing |
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| Abstract: | The formation of micropores, development of male gametes andgermination rate of pollen grains in Manglietia insignis (Wall.) Bl. were investigated in this paper. Its anther is 4-sporangiate. The anther wall is composed of 5-6 layers, epidermis, fibrous endothelium, middle layer (1-2 layers) and glandular tapetum (2-3 layers). Cytokinesis at meiosis of microspore mother cells is modified simultaneous, and tetrads are decussate or isobilateral, occasionally linear. Mature pollen grains are 2-celled. In addition, special characteristics in microsporogenesis were discussed. The results of artificial germination of pollen grains showed that the germination rate was 14.7%～25.3%. The process of male gamete formation was not considered as an important factor responsible for the low seeding rate. |
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| Keywords: | Manglietia insignis Microsporogenesis Male game tophyte development Endangered plant |
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