• 中文核心期刊
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LI Yu-hong, WANG Rong-fu, YING Zhao-yang. Antioxidant physiological responses of Aegiceras corniculatum seedling root system to cadmium stress[J]. Fujian Journal of Agricultural Sciences, 2007, 22(2): 193-196.
Citation: LI Yu-hong, WANG Rong-fu, YING Zhao-yang. Antioxidant physiological responses of Aegiceras corniculatum seedling root system to cadmium stress[J]. Fujian Journal of Agricultural Sciences, 2007, 22(2): 193-196.

Antioxidant physiological responses of Aegiceras corniculatum seedling root system to cadmium stress

  • The antioxidant physiological responses to cadmium stress,including the contents of malondialaehyde(MDA),superoxide anion(O2·-),peroxide enzyme(POD),catalase(CAT),and the root system activity of Aegiceras corniculatum seedlings were investigated in water-culture condition.The results showed that,under the applications of Cd2+ in the range of 0.25-10 mg·L-1,the activity of root system decreased with increased Cd2+ concentration,while the content of O2·-,MDA,and the activities of POD and CAT increased.It revealed that the membrane-lipid peroxidation brought about by the superoxide anions was the main cause of the Cd2+ damage to Aegiceras corniculatum seedling.On the other hand,the protective enzymes exerted Cd2+ stress resistance at the Cd2+ concentrations from 0.25-10 mg·L-1.It indicated that increasing POD and CAT activities of the seedlings should be considered an important part of peroxidation resistance mechanism of the plant to cadmium pollution.And,the enzymatic activities might be a useful biological indicator of Cd2+ contamination.
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