| 不同形态铝对小麦抗氧化系统的影响 |
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| 引用本文： | 朱雪竹,董斌,谢翼飞,包亮,孔繁翔,蒋新,周健明.不同形态铝对小麦抗氧化系统的影响[J].环境化学,2001,20(2):119-123. |
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| 作者姓名： | 朱雪竹 董斌 谢翼飞 包亮 孔繁翔 蒋新 周健明 |
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| 作者单位： | 1. 南京大学环境学院,
2. 中国科学院南京土壤研究所 |
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| 基金项目： | 国家重点基础发展规划项目资助(G1999011801－3) |
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| 摘 要： | 研究了铝在不同ｐＨ条件下的形态分布,测定了单核铝和多核铝对小麦根中超氧化物歧化酶(ＳＯＤ)和过氧化物酶(ＰＯＤ)活性的影响．结果表明,低浓度Ａｌａ和Ａｌｂ激发了小麦根ＳＯＤ活性;ＰＯＤ活性在ｐＨ≤５．０时被显著激活,而当 ｐＨ≥５,５,Ａｌａ与Ａｌｂ浓度较低时ＰＤＤ被显著地抑制;ＳＯＤ与ＰＯＤ活性均在ｐＨ４．５,７５μｍｏｌ·ｌ－１Ａｌ]时达到本实验最高值,与Ａｌｂ浓度的增加相关．本实验结果显示两种形态的铝对植物的致毒机理可能存在一定差异．
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| 关 键 词： | 铝污染 小麦 超氧化物歧化酶 过氧化物酶 抗氧化系统 |
EFFECTS OF Al SPECIATION ON THE ANTIOXIDANTSYSTEM IN WHEAT |
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| Zhu Xuezhu,Dong Bin,Xie Yifei,BAO Liang,Kong Fanxiang,Jiang Xin,ZHOU JIANMIN.EFFECTS OF Al SPECIATION ON THE ANTIOXIDANTSYSTEM IN WHEAT[J].Environmental Chemistry,2001,20(2):119-123. |
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| Authors: | Zhu Xuezhu Dong Bin Xie Yifei BAO Liang Kong Fanxiang Jiang Xin ZHOU JIANMIN |
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| Abstract: | This study was conducted to examine the relationships between aluminum speciation and its phytotoxicity.The toxicity of Ala and Alb on the relevant enzyme activities of Triticum aestivum was investigated.The results showed that both Ala and Alb significantly induced the activities of superoxide dimutase (SOD)at low concentration.The activities of peroxidase(POD)dramatically enhanced by Al when pH≤5.0，whereas they were inhibited by low doses of Ala and Alb(Ala≤0.81 μmol*l-1，Alb≤2.21 μmol*l-1).The activities of SOD and POD arrived at maximum of this experiment at pH4.5 with 75 μmol*l-1 total Al.These results indicated that there might exist some differences in the toxicity mechanisms of Ala and Alb |
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| Keywords: | Triticum aestivum aluminum SOD POD |
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