| 不同耐旱性水稻幼苗对氧化胁迫的反应 |
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| 引用本文： | 郭振飞,卢少云,李宝盛,李明启,黎用朝. 不同耐旱性水稻幼苗对氧化胁迫的反应[J]. Acta Botanica Sinica, 1997, 0(8) |
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| 作者姓名： | 郭振飞 卢少云 李宝盛 李明启 黎用朝 |
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| 作者单位： | 华南农业大学生物技术学院，华南农业大学生物技术学院，华南农业大学生物技术学院，华南农业大学生物技术学院，湖南省水稻研究所 广州 510642，广州 510642，广州 510642，广州 510642，长沙 410125 |
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| 基金项目： | 广东省自然科学基金，农业部“八五”应用基础研究资助项目 |
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| 摘 要： | 干旱条件下水稻(Oryza sativa L.)耐旱性较强的“湘中籼2号”比耐旱性较弱的“湘早釉12号”O_2~-的产生速率低。百草枯(0.01mmol/L)和H_2O_2(10mmol/L)处理促进干旱对水稻幼苗的伤害,但耐旱性较强的品种伤害较轻。单独用百草枯处理后,耐旱性较强的品种比耐旱性较弱的品种能更大幅度地提高超氧物歧化酶和过氧化物酶的活性;而H_2O_2处理后耐旱性较强的品种能提高过氧化氢酶活性。这些结果表明,耐旱性较强的水稻品种有较强的抗氧化胁迫能力。
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| 关 键 词： | 水稻 百草枯 H_2O_2 超氧物歧化酶 过氧化物酶 过氧化氢酶 抗氧化胁迫 |
RESPONSES OF RICE SEEDLINGS IN DIFFERENT DROUGHT TOLERANT CULTIVARS TO OXIDATIVE STRESS |
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| Guo Zhen-fei,Lu Shao-yun,Ld Bao-shen Li Ming-qi. RESPONSES OF RICE SEEDLINGS IN DIFFERENT DROUGHT TOLERANT CULTIVARS TO OXIDATIVE STRESS[J]. , 1997, 0(8) |
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| Authors: | Guo Zhen-fei Lu Shao-yun Ld Bao-shen Li Ming-qi |
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| Abstract: | Rice ( Oryza saliva L.) of drought-tolerant cultivar "Xiangzhongxian No. 2" showed much lower O2- production rate under drought condition than that of drought-sensitive cultivar "Xi-angzaoxian No. 12". Drought damages on both rice cultivars were accelerated by paraquat (0.01 mmol/L) and H2O2 (10 mmol/L); but the drought-tolerant cultivar had greater resistance to these damages than did the drought-sensitive cultivar. The results also showed that in rice of drought-tolerant cultivar, the increase in activities of. superoxide dismutase and peroxidase were much higher than that in drought-sensitive cultivar after treatment of paraquat, and the increase in activity of catalase was more significantly after treatment of H2O2 than that in drought-sensitive cultivar. These results suggest that the drought-tolerant cultivar had greater resistance to oxidative stresses than did the drought-sensitive cultivar. |
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| Keywords: | Rice Paraquat H2O2 Superoxide dismutase Peroxidase Catalase Resistance to oxidative stress |
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