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Effects of excess copper on the oxidative stress in roots of maize seedlings

文献类型: 外文期刊

作者: Wang, Yan Zhao 1 ; Nie, Li Hong 1 ; Tie, Shuanggui 1 ; Xie, Deyi 1 ; Zhu, Weihong 1 ; Qi, Jianshuang 1 ; Yue, Runqing 1 ;

作者机构: 1.Henan Acad Agr Sci, Zhengzhou, Peoples R China

关键词: Maize;superoxide dismutase;peroxidase;catalase;ascorbate peroxidase;glutathione reductase;glutathione S-transferase

期刊名称:AFRICAN JOURNAL OF AGRICULTURAL RESEARCH ( 影响因子:0.263; 五年影响因子:0.203 )

ISSN: 1991-637X

年卷期: 2011 年 6 卷 21 期

页码:

收录情况: SCI

摘要: Though Cu is a necessary nutrient element for organisms, it can cause damage to biota inhabited in Cu-contaminated regions. Zhendan958 is one of the dominant cultivar of maize (Zea mays L.) in China in the last five years, due to its better traits in production. To assay the acute resistant response of Zhendan958 under Cu stress, the seedling was treated with 2 to 8 mM Cu for 96 h and many physiological parameters were assayed in the roots. Cu inhibited the bioaccumulation of root biomass but increased the accumulation of Cu in roots. Cu stress induced the loss of plasma membrane integrity and lipid peroxidation as revealed by the histochemical staining and increased malondialdehyde content. Cu stimulated the activity of superoxide dismutase, peroxidase, catalase, ascorbate peroxidase, glutathione reductase and glutathione S-transferase. Cu stress altered the content of glutathione, and ascorbic acid significantly. These indicated that seedlings of Zhendan958 can grow in median level of Cu contaminated soils for aims to phytoremediation.

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