| 超高产水稻组合‘培矮64S/E32’的耐光氧化特性及其机理 |
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| 引用本文： | 欧志英,彭长连林桂珠,温,学.超高产水稻组合‘培矮64S/E32’的耐光氧化特性及其机理[J].植物学报,2003,20(5):558-564. |
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| 作者姓名： | 欧志英 彭长连林桂珠 温 学 |
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| 作者单位： | (中国科学院华南植物研究所 广州 510650） |
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| 摘 要： | 甲基紫精（MV）介导的光氧化导致两个水稻品种‘汕优63’(目前我国大面积推广的杂交水稻)和‘培矮64S/E32’（新培育的超高产杂交水稻）细胞电解质渗漏率都增加，前者增加的量大于后者，显示‘培矮64S/E32’的细胞膜系统受光氧化的伤害小。光氧化条件下，‘培矮64S/E32’仍能维持较高的光合放氧能力（Amax、Φi）、PSⅡ活性（Fv/Fm、ΦPSⅡ）和叶绿素荧光猝灭系数（qP、NPQ），而且光氧化引起‘培矮64S/E32’这些参数的下降幅度也小。另外，光氧化导致了两个水稻品种抗氧化酶SOD和APX活性增加，‘培矮64S/E32’增加的幅度约为‘汕优63’的3倍。结果表明超高产水稻具有更强的耐光氧化能力。
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| 关 键 词： | 超高产水稻 甲基紫精 光氧化 抗氧化酶 |
| 收稿时间： | 2002-01-15 |
| 修稿时间： | 2002-11-25 |
The Characters and Mechanism of Photooxidation Tolerance in Leaves of Peiai64S/E32, a Super High-yielding Hybrid Rice (Oryza sativa L.) |
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| OU Zhi-Ying,PENG Chang-LianLIN Gui-Zhu,WEN Xue.The Characters and Mechanism of Photooxidation Tolerance in Leaves of Peiai64S/E32, a Super High-yielding Hybrid Rice (Oryza sativa L.)[J].Bulletin of Botany,2003,20(5):558-564. |
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| Authors: | OU Zhi-Ying PENG Chang-LianLIN Gui-Zhu WEN Xue |
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| Affiliation: | (South China Institute of Botany, the Chinese Academy of Sciences, Guangzhou 510650) |
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| Abstract: | Increase in cell membrane ion leakage was induced by Methyl Viologen-mediated photooxidation in two rice cultivars, ‘Shanyou63' (developed hybrid cultivar) and ‘Peiai64S/E32' (super high-yielding hybrid cultivar). More increment of cell membrane leakage was shown in ‘Shanyou63' than that in ‘Peiai64S/E32' which means less damage to cell membrane in ‘Peiai64S/E32' than in ‘Shanyou63' under photooxidation.‘Peiai64S/E32' had higher values of photosynthetic oxygen evolution competence (Amax,Φi)、PSⅡ activity (Fv/Fm, ΦPSⅡ) and chlorophyll fluorescence quenching coefficient (qP, NPQ) and less reduction under photooxidation in comparison with ‘Shanyou63'. In addition, ‘Peiai64S/E32' had as much as 3 folds increase in activities of SOD and APX than ‘Shanyou63' under photooxidation. These results indicated that super high-yielding rice ‘Peiai64S/E32' exhibited more resistance to photooxidation mediated by MV than ‘Shanyou63'. |
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