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題 名 | Copper Toxicity in Rice Seedlings: Changes in Antioxidative Enzyme Activities, H[feaf]O[feaf]Level, and Cell Wall Peroxidase Activity in Roots=水稻幼苗銅之毒害:抗氧化酵素活性、過氧化氫含量與細胞壁過氧化酵素活性之變化 |
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作 者 | 陳麗敏; 林傳琦; 高景輝; | 書刊名 | Botanical Bulletin of Academia Sinica |
卷 期 | 41:2 2000.04[民89.04] |
頁 次 | 頁99-103 |
分類號 | 434.111 |
關鍵詞 | 銅; 脂質過氧化作用; 水稻; 氧化逆境; 根生長; Copper; Lipid peroxidation; Oryza sativa; Oxidative stress; Root growth; |
語 文 | 英文(English) |
中文摘要 | 本研究主要探討銅處理水稻幼苗對根內脂質過氧化作用、抗氧化酵素活性、過氧化氫含量與細胞壁內過氧化酵素活性變化之影響,同時探討這些變化與銅抑制根生長間之關係。硫酸銅處理可增加水稻幼苗根脂質過氧化作用與改變抗氧化酵素之活性。硫酸銅可增加水稻幼苗根 superoxide dismutase,ascorbate peroxidase,glutathione reductase 與 peroxidase 活性,但不影響 catalase 活性。硫酸銅處理同時可增加根之過氧化氫含量與根內細胞壁過氧化酵素活性。外加過氧化氫處理可顯著的抑制水稻幼苗根生長。銅所抑制之水稻幼苗根生長很可能與經由過氧化氫及過氧化酵素所催化之細胞壁變硬有關。 |
英文摘要 | The changes in lipid peroxidation, antioxidative enzyme activity, H2O2 level, and cell wall peroxidase activity in Cu-stressed roots of rice seedlings and their relation with root growth inhibition were investigated. CuSO4 was effective in inhibiting root growth but not shoot growth. Treatment with CuSO4 resulted in an increase in lipid peroxidation and modulated antioxidative enzyme activities in rice roots. CuSO4 increased the activities of superoxide dismutase, ascorbate peroxidase, glutathione reductase, and peroxidase, but had no effect on catalase. CuSO4 also increased H2O2 level and cell wall peroxidase in roots of rice seedlings. Exogenous application of H2O2 resulted in an inhibition of root growth. It appears that growth inhibition of root caused by Cu is associated with H2O2 dependent peroxidase-catalyzed formation of cross-linking among cell wall polymers. |
本系統中英文摘要資訊取自各篇刊載內容。