| 水稻对紫外光B辐射增强的生化适应机制 |
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| 引用本文： | 黄少白,彭少兵.水稻对紫外光B辐射增强的生化适应机制[J].作物学报,1998,24(4):464-469. |
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| 作者姓名： | 黄少白 彭少兵 |
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| 作者单位： | 江苏省农业科学院农业生物遗传生理研究所，江苏南京，210014 |
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| 基金项目： | 江苏省自然科学基金，江苏省农科院，菲律宾国际水稻研究所合作项目 |
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| 摘 要： | 水稻品种１Ｒ６８和Ｄｕｌａｒ生长在室外条件下，在以自然条件（６．０），１３．０和１９．１ｋＪｍ＾－１ｄａｙ＾－１（分别模拟臭氧浓度下降２０％和４０％时的ＵＶ－Ｂ强度）的紫外光Ｂ（ＵＶ－Ｂ２８０～３２０ｎｍ）进行二周与四周的辐射处理，研究ＵＶ－Ｂ对水稻叶片内一些生化指标的影响，研究结果表明，ＵＶ－Ｂ辐射增强诱导了二个水稻品种对叶片内吸收ＵＶ的类黄酮化俣物的积累，同时使叶片内多胺的含量明显提高，然而，
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| 关 键 词： | 水稻 紫外光B 类黄酮 多胺 SOD 辐射增强 |
| 收稿时间： | 1996-05-21 |
| 修稿时间： | 1997-02-07 |
Biochemical Mechanism of Acclimation of Rice(Oryza sativa L. ) to Supplemental Ultraviolet-B Radiation |
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| Huang Shaobai Dai Qiujie Liu Xiaozhong Peng Shaobing B. S. Vergara.Biochemical Mechanism of Acclimation of Rice(Oryza sativa L. ) to Supplemental Ultraviolet-B Radiation[J].Acta Agronomica Sinica,1998,24(4):464-469. |
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| Authors: | Huang Shaobai Dai Qiujie Liu Xiaozhong Peng Shaobing B S Vergara |
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| Institution: | Institute of Agrobiological Genetic & Physiology,Jiangsu Academy of Agricultural Sciences,Nanjing,Jiangsu, 210014 |
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| Abstract: | Two rice cultivars IR68 and Dular were grown in an outdoor experiment treat
ed by ambient, 13.0(stimulating 20% ozone depletion) and 19.1 (stimulating 40% ozone deple
tion) kJ m-2 day-1 of biologically effective ultraviolet-B(UV-B) for two and four weeks to study
the effect of supplemental UV-B radiation on the several biochemical indices in the leaves of rice.
Accumulation of UV-absorbing flavonoids induced by UV-B radiation was observed in both culti
vars. Polyamine levels in the leaves of IR68 and Dular were significantly increased by UV-B radi
ation at week 2 and 4. However, catalase and superoxide dismutase activities in both cultivars
subjected to 19.1 kJ m-2 day-1 UV-B radiation decreased obviously at week 2 and 4. The bio
chemical parameters mentioned above were more sensitive to the UV-B radiation dose than the
UV-B treatment time. These results showed that the tolerance of rice to supplemental UV-B ra
diation involved in the accumulation of UV-absorbing flavonoids and polyamine not through the
increase of activities of antioxidative enzymatic system. |
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| Keywords: | Rice Ultraviolet-B Flavonoids Polyaminesj Catalase Superoxide dismu-tase |
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