| Physiological Defense Mechanism of Ligularia intermedia Against UV—B Radiation on Dongling Mountain |
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| 引用本文： | 李鑫,贾顺姬,简嘉,林孟仪,李骑昂,黄晓春,张超,张荣庆,张贵友.Physiological Defense Mechanism of Ligularia intermedia Against UV—B Radiation on Dongling Mountain[J].清华大学学报,2003,8(4):481-486. |
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| 作者姓名： | 李鑫 贾顺姬 简嘉 林孟仪 李骑昂 黄晓春 张超 张荣庆 张贵友 |
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| 作者单位： | DepartmentofBiologicalSciencesandBiotechnology,TsinghuaUniversity,Beijing100084,China |
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| 基金项目： | Supported by the Students Research Training(SRT) (No. 2 S0 0 5 ) and the Modern L ife Science Experimental Education Center of Tsinghua U niversit |
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| 摘 要： | Liguloria intermedia growing at different altitudes were used to investigate the mechanism of ultraviolet (UV)-resistance on physiological aspects in the field. The tests compared the absorbance of the UV-absorbing compound, the content of chlorophyll a, chlorophyll b, and carotenoids, and the activities of peroxidase (POX) and superoxide dismutase (SOD) in Ligularia intermedia growing at three different altitudes on Dongling Mountain in northern China. There were no significant differences between the plants growing at 1160m and 1820m. However, all of these factors increased dramatically at 2190m. The results indicate tha tthe UV-resistance of the plants mainly depends on the mechanism of filtering the radiation and preventing the reactive oxygen species (ROS) damage produced by UV-B.
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| 关 键 词： | 橐吾 植物生理学 防卫机制 紫外线辐射 过氧物酶 超氧物歧化酶 UV－B |
Physiological Defense Mechanism of Ligularia intermedia Against UV-B Radiation on Dongling Mountain |
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| LI Xin,JIA Shunji,JIAN Jia,LIN Mengyi,LI Qi'ang,HUANG Xiaochun,ZHANG Chao,ZHANG Rongqing,ZHANG Guiyou.Physiological Defense Mechanism of Ligularia intermedia Against UV-B Radiation on Dongling Mountain[J].Tsinghua Science and Technology,2003,8(4):481-486. |
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| Authors: | LI Xin JIA Shunji JIAN Jia LIN Mengyi LI Qi'ang HUANG Xiaochun ZHANG Chao ZHANG Rongqing ZHANG Guiyou |
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| Institution: | LI Xin,JIA Shunji,JIAN Jia,LIN Mengyi,LI Qi'ang,HUANG Xiaochun,ZHANG Chao,ZHANG Rongqing,ZHANG Guiyou ** Department of Biological Sciences and Biotechnology,Tsinghua University,Beijing 100084,China |
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| Abstract: | Ligularia intermedia growing at different altitudes were used to investigate the mechanism of ultraviolet (UV) resistance on physiological aspects in the field. The tests compared the absorbance of the UV absorbing compound, the content of chlorophyll a, chlorophyll b, and carotenoids, and the activities of peroxidase (POX) and superoxide dismutase (SOD) in Ligularia intermedia growing at three different altitudes on Dongling Mountain in northern China. There were no significant differences between the plants growing at 1160 m and 1820 m. However, all of these factors increased dramatically at 2190 m. The results indicate that the UV resistance of the plants mainly depends on the mechanism of filtering the radiation and preventing the reactive oxygen species (ROS) damage produced by UV B |
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| Keywords: | UV B radiation reactive oxygen species (ROS) photosynthetic pigment UV absorbing compound superoxide dismutase (SOD) peroxidase (POX) |
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