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題 名 | Effect of Excess Copper on Rice Leaves: Evidence for Involvement of Lipid Peroxidation=過量銅對水稻切離葉片之效應:脂質過氧化作用參與之証據 |
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作 者 | 陳麗敏; 高景輝; | 書刊名 | Botanical Bulletin of Academia Sinica |
卷 期 | 40:4 1999.10[民88.10] |
頁 次 | 頁283-287 |
分類號 | 434.113 |
關鍵詞 | 銅; 脂質過氧化; 葉片老化; 水稻; Copper; Lipid peroxidation; Leaf senescence; Oryza sativa; |
語 文 | 英文(English) |
中文摘要 | 本研究探討過量銅促進水稻切離葉片老化與脂質過氧化間之關係。過量銅處理可促進切離老化與增加過氧化作用,但不會增加過氧化氫含量。過量銅處理抑制 catalase 與 glutathione reductase 活性,但不影響 superoxide dismutase 及 ascobate peroxidase 活性。自由基清除劑可抑制過量銅所促進之葉片老化,同時抑制過量銅所誘導之脂質過氧化作用,顯示過量銅所造成的脂質過氧化作用係由自由基所引起。 |
英文摘要 | Lipid peroxidation in relation to senescence of detached rice leaves caused by excess copper was investigated. Excess copper, which was found to promote senescence, increased the level of lipid peroxidation but not the level of H2O2,. Catalase and glutathionine reductase activities were reduced by excess copper. Superoxide dismutase and ascobate peroxidase activities did not seem affected by excess copper. Free radical scavengers inhibited excess copper-promoted senescence and at the same time inhibited excess copper-induced lipid peroxidation, suggesting that lipid peroxidation induced by excess copper is mediated through free radicals. |
本系統中英文摘要資訊取自各篇刊載內容。