| 迷果芹(\%Sphallerocarpus gracilis)和红三叶 |
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| 引用本文： | 赵东利,胡忠,陈炜,江晓雯,王仑山.迷果芹(\%Sphallerocarpus gracilis)和红三叶[J].西北植物学报,2001,21(5):1026-1030. |
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| 作者姓名： | 赵东利 胡忠 陈炜 江晓雯 王仑山 |
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| 作者单位： | 兰州大学生命科学学院 |
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| 基金项目： | 国科基字 [1 990 ]0 4 5号《淮河水体污染防治的生态系统理论研究》课题资助 |
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| 摘 要： | 对迷果芹(Sphallerocarpusgracilis(Bess.)K-Pol.)和红三叶(TrifoliumpratenseL.)进行了染色体计数及核型分析.迷果芹的染色体数目为2n=20,核型公式为K(2n)=2x=20=14m+4sm+2st(SAT);核型类型为2A,为较对称核型,该种植物的染色体数目及核型均为首次报道.红三叶的染色体数目有2n=14、16、28、32等类型,本研究首次报道了2n=14的核型公式为K(2n)=2x=14=2M+12m,核型类型为1B,为较原始的对称核型.
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| 关 键 词： | 迷果芹 红三叶 染色体数目 核型分析 |
| 文章编号： | 1000-4025-(2001)05-1026-05 |
| 修稿时间： | 2000年5月8日 |
Observe the pollen grains of Vallisneria longipedunculata by electron microscope |
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| SHEN Xian-sheng,LU Run-long,ZHOU Zhong-ze.Observe the pollen grains of Vallisneria longipedunculata by electron microscope[J].Acta Botanica Boreali-Occidentalia Sinica,2001,21(5):1026-1030. |
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| Authors: | SHEN Xian-sheng LU Run-long ZHOU Zhong-ze |
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| Institution: | SHEN Xian-sheng1,LU Run-long1,ZHOU Zhong-ze2 |
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| Abstract: | We have observed the pollen grains of submerged plant Vallisn eria longipedunculata first by electron microscope (SEM and TEM).The pollens possess very thin cell wall,and have not any aperture,but have 2~3 holes with the viscin threads.In the wall of the pollen,the tectum isnt very clear with few and scattered pro-orbicules.The nexine is thicker,but the structure of the bacula becomes hardly differentiation,it looks like sponge as a whole.The intine is thinner.There are a lot of starch grain in the pollens,including the simple starch grains and the compound ones,but the half-compound starch grains dont appear in it. |
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| Keywords: | Vallisneria longipedunculata pollens starch grains electron microscope |
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