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| Hg~(2+)、Cd~(2+)污染对水稻叶肉细胞伤害的超微观察 | |
| 引用本文： | 王逸群,郑金贵,陈文列,陈莲云.Hg~(2+)、Cd~(2+)污染对水稻叶肉细胞伤害的超微观察[J].福建农林大学学报(自然科学版),2004,33(4):409-413. |
| 作者姓名： | 王逸群 郑金贵 陈文列 陈莲云 |
| 作者单位： | 1. 福建师范大学生物工程学院,福建,福州,350007;福建农林大学生物技术中心,福建,福州,350002 2. 福建农林大学生物技术中心,福建,福州,350002 3. 福建医科大学电子显微镜室,福建,福州,350004 |
| 基金项目： | 国家自然科学基金(30070467)，福建省科技厅(2001Z012)，福建省博士后基金资助项目. |
| 摘 要： | 以不同浓度的Hg2+和Cd2+处理水稻,对其叶肉细胞进行透射电子显微镜观察,发现随着Hg2+和Cd2+浓度的提高,叶肉细胞中细胞核、叶绿体、线粒体受毒害逐渐加重;表现为叶绿体被膜受损,类囊体遭到破坏,细胞核核膜破裂,核仁消失,线粒体被膜结构受损,内嵴逐渐解体.结果表明:Hg2+比Cd2+对水稻叶肉细胞超微结构的破坏作用稍强;Hg2+和Cd2+对细胞器的毒害作用是整体性的;水稻叶肉细胞线粒体是对Hg2+和Cd2+毒害作用较敏感的细胞器. |
| 关 键 词： | 汞、镉污染 水稻 叶肉细胞 伤害 超微结构 |
| 文章编号： | 1006-7817(2004)04-0409-05 |
| 修稿时间： | 2004年3月26日 |
Ultrastructural study of mesophyll cells damaged from Hg2+ and Cd2+ pollution in rice |
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| WANG Yi-qun.Ultrastructural study of mesophyll cells damaged from Hg2+ and Cd2+ pollution in rice[J].Journal of Fujian Agricultural and Forestry University,2004,33(4):409-413. | |
| Authors: | WANG Yi-qun |
| Institution: | WANG Yi-qun~ |
| Abstract: | The rice plants were treated by Hg~(2 ) and Cd~(2 ) with different concentration respectively and their mesophyll cells were observed under transmission electron microscope. Ultrastructural observation showed that toxic effects on cell nucleus, chloroplast and mitochondria were gradually increasing with the increasing concentration of Hg~(2 ) and Cd~(2 ); Their manifestations were that chloroplast membranes were injured and thylakoids were damaged; Nuclear membranes were splitted and nucleolus disappeared; Mitochondrial membranes were also injured and mitochondrial cristaes were gradually degraded. It was indicated that the toxic effects of Hg~(2 ) on ultrastructure of mesophyll cells were stronger than those of Cd~(2 ); Their toxic effects were integrative and mitochondria of rice mesophyll cells were the most sensitive organelles among them. |
| Keywords: | Hg~(2 ) and Cd~(2 ) pollution rice mesophyll cell damage ultrastructure |
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