| 镉胁迫下小麦叶中超氧阴离子自由基的积累 |
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| 引用本文： | 罗立新,孙铁珩,靳月华.镉胁迫下小麦叶中超氧阴离子自由基的积累[J].环境科学学报,1998,18(5):495-499. |
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| 作者姓名： | 罗立新 孙铁珩 靳月华 |
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| 作者单位： | 中国科学院沈阳应用生态研究所,110015 |
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| 摘 要： | 在镉腔迫下，小麦中中超氧阴离子自由基的积累显增加，伴随ＭＤＡ含量升高，显示发生膜脂过氧化。镉腔迫使活性氧清降酶系统功能紊乱，其中ＳＯＤ酶活性下降，ＰＯＤ酶活性升高，在是ＣＡＴ酶活无显变化。
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| 关 键 词： | 镉 小麦 超氧阴离子 作物监测 SOD |
| 收稿时间： | 1996/12/15 0:00:00 |
| 修稿时间： | 1997/7/28 0:00:00 |
ACCUMULATION OF SUPEROXIDE RADICAL IN WHEAT LEAVES UNDER CADMIUM STRESS |
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| Luo Lixin,Sun Tieheng and Jin Yuehua.ACCUMULATION OF SUPEROXIDE RADICAL IN WHEAT LEAVES UNDER CADMIUM STRESS[J].Acta Scientiae Circumstantiae,1998,18(5):495-499. |
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| Authors: | Luo Lixin Sun Tieheng and Jin Yuehua |
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| Institution: | Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110015,Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110015 and Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110015 |
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| Abstract: | Germinating seedlings of wheat (Triticum aestivum) were treated with different concentrations of cadmium acetate (0.05, 0.1, 0.3, 0.5 and 1.0 mmol/L. Cd2+ treatment significantly enhanced the accumulations of superoxide radical (O-·2) and malondialdehyde (MDA) in wheat leaves. Under cadmium stress, the activity of superoxide dismutase (EC1.15.1.1) apparently decreased while catalase (EC1.11.1.6) changed insignificantly. Furthermore, the content of sulfhyryl group was lower, and the electrolyte leakage outward leave cells was much high. Our results suggest that effects of Cd2+ on wheat seeding are achieved by excessive accumulation of superoxide radical which results from the degradation of the free radical scavenging system. |
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| Keywords: | cadmium wheat membrane lipid peroxidation superoxide radical superoxide dismutase |
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