| Hg~(2+)对苜蓿叶片的毒害效应 |
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| 引用本文： | 张健,刘美艳,肖炜.Hg~(2+)对苜蓿叶片的毒害效应[J].广西植物,2002,22(6):553-556-556. |
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| 作者姓名： | 张健 刘美艳 肖炜 |
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| 作者单位： | 1. 徐州师范大学生物系,江苏徐州,221009
2. 徐州农业学校,江苏徐州,221006 |
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| 摘 要： | 研究了Hg2 + 对苜蓿叶片的毒害效应。结果表明 :随着Hg2 + 浓度的增加和处理时间的延长 ,叶绿素含量下降 ,电导度上升 ;低Hg2 + 浓度及短时间处理 ,超氧阴离子自由基 (O·2 )和丙二醛 (MDA)含量增加 ,SOD、POD和CAT等保护酶活性升高 ,表明膜系统受到了伤害 ;高Hg2 +浓度及长时间处理 ,O·2 和MDA含量下降 ,SOD、POD和CAT等保护酶活性降低 ,表明细胞结构和功能受到了不可逆的伤害。
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| 关 键 词： | Hg2+ 苜蓿 超氧阴离子自由基 丙二醛 保护酶 |
| 文章编号： | 1000-3142(2002)06-0553-04 |
| 修稿时间： | 2001年10月16 |
The toxic effect of Hg2+ on alfalfa leaves |
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| ZHANG Jian,LIU Mei-yan,XIAO Wei.The toxic effect of Hg2+ on alfalfa leaves[J].Guihaia,2002,22(6):553-556-556. |
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| Authors: | ZHANG Jian LIU Mei-yan XIAO Wei |
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| Institution: | ZHANG Jian1,LIU Mei-yan2,XIAO Wei1 |
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| Abstract: | The toxic effect of Hg 2+on alfalfa leaves was studied. The results showed that the content of chlorophyll decreased and the conductivity increased with Hg 2+ concentration′s increase and the treated time′s prolongation. In low Hg 2+ concentration and short treated time, the content of superoxide free radical(O · 2and malondialdehyde(MDA) increased, the activity of protective enzyme such as SOD?POD and CAT increased too, which indicated that the membrane system had been damaged. However, in high Hg 2+ concentration and the treated time′s prolonged, the content of O · 2 and MDA decreased and the activity of protective enzyme such as SOD?POD and CAT decreased too, which indicated that the construction and function of cells had been suffered irreversible damage. |
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| Keywords: | Hg 2+ alfalfa superoxide free radical malondialdehyde protective enzyme |
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