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題名 | Antioxidant Responses of Rice Seedlings to Sulfur Deficiency=水稻幼苗缺硫時之抗氧化反應 |
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作者姓名(中文) | 郭俊伶; 趙雲洋; 高景輝; | 書刊名 | 作物、環境與生物資訊 |
卷期 | 10:3 2013.09[民102.09] |
頁次 | 頁165-171 |
分類號 | 434.1103 |
關鍵詞 | 抗氧化反應; 氧化逆境; 缺硫; 水稻; Antioxidant response; Oxidative stress; Sulfur deficiency; Rice; |
語文 | 英文(English) |
中文摘要 | 本研究探討水稻幼苗缺硫時之抗氧化反應。水稻缺硫時會降低地上部生長,但不影響地下部之生長。缺硫會增加葉片H2O2與malondialdehyde含量,降低半胱氨酸(cysteine)與還原態穀胱甘肽(glutathione,GSH)含量,還原態穀胱甘肽與氧化態穀胱甘肽態之比值和ascorbate peroxidase、glutathione reductase、catalase等活性。此外,缺硫時抗壞血酸含量(AsA)與AsA/dehydroascorbate之比值不受影響,但會增加superoxide dismutase之活性。由以上結果可知,水稻缺硫時會改變抗氧化狀態並誘導氧化逆境之形成。 |
英文摘要 | In this study, we investigated the antioxidant responses of rice seedlings to sulfur (S) deficiency. Sulfur deficiency resulted in a reduction of shoot growth but not root growth. Accumulation of H2O2 and malondialdehyde in leaves was induced by S deficiency. The contents of cysteine, glutathione (GSH) and the ratio of GSH/oxidized glutathione, and the activities of ascorbate peroxidase, glutathione reductase, and catalase were lower in S-deficient leaves compared to control leaves. However, the content of ascorbate (AsA) and the ratio of AsA/dehydroascorbate were not affected and superoxide dismutase was increased by S deficiency. Our results demonstrate that S deficiency altered changes in antioxidant status and induced oxidative stress in rice seedlings. |
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