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  • Title: [Effects of cadmium stress on active oxygen generation, lipid peroxidation and antioxidant enzyme activities in radish seedlings].
    Author: Tang CF, Liu YG, Zeng GM, Li CF, Xu WH.
    Journal: Zhi Wu Sheng Li Yu Fen Zi Sheng Wu Xue Xue Bao; 2004 Aug; 30(4):469-74. PubMed ID: 15627698.
    Abstract:
    When seedlings of radish were treated with Cd2+ from 125 to 500 micromol/L, for a period of 12 to 96 h in hydroponic system, increase in ratio of SOD to CAT and levels of O(-.)(2), H(2)O(2), MDA indicate that Cd2+ induces oxidative stress in radish plants. Antioxidant enzyme activities responded differently to the level and time of Cd2+ treatment. Under 125 micromol/L Cd2+ treatment a gradual increase in SOD activity was observed; at 250, 500 micromol/L Cd2+ treatment SOD activity increased first, then declined considerably to even lower than that of the control during later Cd2+ treatment. A gradual decrease in roots and a marked increase in leaves in CAT activity were detected. GR activity in both leaves and roots were enhanced significantly with the increase in content of Cd2+ and time of treatment. The increase in GR activity suggests that AsA-GsH cycle may be activated to scavenge the AOS or the synthesis of PC may be stimulated to chelate cadmium.
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