| 水蔗草胚珠附器的研究 |
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| 引用本文： | 马三梅 王永飞叶秀麟 梁承邺,赵南先.水蔗草胚珠附器的研究[J].植物学报,2003,20(1):90-93. |
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| 作者姓名： | 马三梅 王永飞叶秀麟 梁承邺 赵南先 |
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| 作者单位： | 1(中国科学院华南植物研究所 广州 510650) 2(暨南大学生物工程学系 广州 510632) |
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| 基金项目： | ,国家自然科学基金,the,Ninth-Five-Year,Key,Project,of,the,Chinese,Academy,of,Sciences |
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| 摘 要： | 本文对水蔗草的胚珠附器进行研究，结果表明：在功能大孢子时期，珠孔端的1～3个珠心细胞开始特化，发育成胚珠附器；胚珠附器发生时，有些胚珠同时出现无孢子生殖原始细 胞；有性生殖和无孢子生殖的胚囊中均有胚珠附器存在；但在无孢子生殖的胚囊中，胚珠附器一般很大，长约是宽的1～３倍；而有性生殖胚囊的胚珠附器的长约是宽的1～２倍；和有性生殖胚囊相比，无孢子生殖胚囊的胚珠附器更加发达；存在发达的胚珠附器是水蔗草无孢子生殖胚囊的特点之一。
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| 关 键 词： | 水蔗草 胚珠附器 无孢子生殖 |
| 收稿时间： | 2002-04-22 |
| 修稿时间： | 2002-09-07 |
The Embellum in Apluda mutica |
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| MA San-Mei,WANG Yong-Fei,YE Xiu-Lin,LIANG Cheng-Ye,ZHAO Nan-Xian.The Embellum in Apluda mutica[J].Bulletin of Botany,2003,20(1):90-93. |
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| Authors: | MA San-Mei WANG Yong-Fei YE Xiu-Lin LIANG Cheng-Ye ZHAO Nan-Xian |
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| Institution: | 1(South China Institute of Botany, the Chinese Academy of Sciences, Guangzhou 510650) 2(Department of Bioengineering, Jinan University, Guangzhou 510632) |
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| Abstract: | Embellum of Apluda mutica was studied by light microscope. It was demonstrated that outer layer of 1-3 nucellar cells which enlarge in size and often protrude into the micropyle to form embellum at the functional megaspore stage. Both polygonum type and panicum type embryo sac have embellum. The length of embellum is about one to three times of its width in mature aposporous embryo sac, while its length is one to two times of its width in mature sexual embryo sac. The mature embellum cells in aposporous embryo sac were larger than that in sexual embryo sac. The larger embellum could be used as a secondary screening indicator for identifying aposporous embryo sac in Apluda mutica. |
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| Keywords: | , |
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