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| Positional variation of antipodal cells in polyembryonic rice ApⅢ before and after fertilization | |
| 作者姓名： | YUAN Liangchen CHEN Yongzhe MU Xijin LIN Jinxing |
| 作者单位： | Key Laboratory of Photosynthesis and Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China;Institute of Cell Biology and Genetics, School of Life Science, Shandong University, Jinan 250100, China,Institute of Cell Biology and Genetics, School of Life Science, Shandong University, Jinan 250100, China,Key Laboratory of Photosynthesis and Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China,Key Laboratory of Photosynthesis and Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China |
| 基金项目： | Supported by the Chinese Academy of Sciences and the National Fund for Distinguished Young Scholars (Grant No. 30225005) |
| 摘 要： | The variation in the position of antipodal cells before and after fertilization in polyembryonic rice strain ApⅢ was studied by using conventional sectioning technique. It was shown that initially the three antipodal cells lie at the chalazal end of the young embryo sacs. Along with the development of embryo sac, the antipodal cells proliferate into a multicellular structure containing up to about 20 cells. Most of the cells migrate to its dorsal side when the embryo sacs turn into mature. In a few embryo sacs the antipodal cells are situated in the positions adjacent to the egg apparatus at the micropylar end, while in other sacs, they spread from the midst of the embryo sac to the micropylar end clinging to the nucellar tissue. Furthermore, it is reported for the first time that cells of some egg apparatus or proembryos disorganize when antipodal cells lie at the micropylar end, indicating that the function of the antipodal cells may vary during the embryogenesis in rice ApⅢ. |
| 关 键 词： | polyembryonic rice antipodal cell embryo sac egg apparatus |
Positional variation of antipodal cells in polyembryonic rice ApⅢ before and after fertilization |
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| YUAN Liangchen,CHEN Yongzhe,MU Xijin,LIN Jinxing.Positional variation of antipodal cells in polyembryonic rice ApⅢ before and after fertilization[J].Progress in Natural Science,2003,13(11):814-818. | |
| Authors: | YUAN Liangchen CHEN Yongzhe MU Xijin LIN Jinxing |
| Institution: | 1. Key Laboratory of Photosynthesis and Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China;Institute of Cell Biology and Genetics, School of Life Science, Shandong University, Jinan 250100, China 2. Institute of Cell Biology and Genetics, School of Life Science, Shandong University, Jinan 250100, China 3. Key Laboratory of Photosynthesis and Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China |
| Abstract: | The variation in the position of antipodal cells before and after fertilization in polyembryonic rice strain ApⅢ was studied by using conventional sectioning technique. It was shown that initially the three antipodal cells lie at the chalazal end of the young embryo sacs. Along with the development of embryo sac, the antipodal cells proliferate into a multicellular structure containing up to about 20 cells. Most of the cells migrate to its dorsal side when the embryo sacs turn into mature. In a few embryo sacs the antipodal cells are situated in the positions adjacent to the egg apparatus at the micropylar end, while in other sacs, they spread from the midst of the embryo sac to the micropylar end clinging to the nucellar tissue. Furthermore, it is reported for the first time that cells of some egg apparatus or proembryos disorganize when antipodal cells lie at the micropylar end, indicating that the function of the antipodal cells may vary during the embryogenesis in rice ApⅢ. |
| Keywords: | polyembryonic rice antipodal cell embryo sac egg apparatus |
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