Effects of cadmium and copper on antioxidant capacities, lignification and auxin degradation in leaves of pea (Pisum sativum L.) seedlings
Effects of cadmium and copper on antioxidant capacities, lignification and auxin degradation in leaves of pea (Pisum sativum L.) seedlings
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DOI：
10.1016/j.crvi.2004.10.001
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发表时间：
2005-01-01
影响因子：
2
通讯作者：
El Ferjani, E
中科院分区：
文献类型：
--
作者：
Chaoui, A;El Ferjani, E
用20和100 μ M的Cd（NO3）（2）或CuSO4处理10天龄的豌豆幼苗4天。在叶片中，所有处理均导致脂质过氧化产物速率增加。然而，20 μ M的铜没有影响的增长。此外，除了20 μ M的铜，非特异性过氧化物酶的活性，作为胁迫标记，在金属胁迫植物的细胞壁增强。在用20 μ M的金属处理的植物中没有观察到抗氧化能力的变化。在这个剂量下，镉减少的增长可能与IAA氧化酶和木质化过氧化物酶的活性升高。这些后者的增加，在音乐会与抗氧化能力的损失，将负责接触到100 μ M的金属后的生长减少。然而，100 μ M的铜对木质化酶的活性没有影响。强调了细胞组分对应激酶促反应的贡献。(C)2004年科学院。出版社：Elsevier SAS All rights reserved.
Twelve-day-old seedlings of pea were treated for four days by 20 and 100 muM of Cd(NO3)(2) or CuSO4. In leaves, all treatments caused an increase in the lipoperoxidation product rate. However, 20 muM of Cu did not affect the growth. Moreover, except for 20 muM of Cu, the activity of unspecific peroxidases, used as stress marker, was enhanced in cell walls of metal-stressed plants. No change in the antioxidant capacities was observed in plants treated with 20 muM of metal. At this dose, the Cd-reduced growth could be associated to an elevation in the activities of IAA oxidase and of lignifying peroxidases. Increase of these latter, in concert with loss in antioxidant capacities, would be responsible for the growth diminution after exposure to 100 muM of metal. However, the activity of lignifying enzymes was not affected by 100 muM of Cu. The contribution of cell fractions to enzymatic responses to stress is emphasized. (C) 2004 Academie des sciences. Published by Elsevier SAS. All rights reserved.