Physiological Defense Mechanism of Ligularia intermedia Against UV—B Radiation on Dongling Mountain

编号 zgly0000311625

文献类型 期刊论文

文献题名 Physiological Defense Mechanism of Ligularia intermedia Against UV—B Radiation on Dongling Mountain

作者 李骑昂  黄晓春  张超  张荣庆  张贵友  李鑫  贾顺姬  简嘉  林孟仪 

作者单位 DepartmentofBiologicalSciencesandBiotechnology  TsinghuaUniversity  Beijing100084  China 

母体文献 Tsinghua Science and Technology;清华大学学报: 自然科学英文版 

年卷期 2003,8(4)

页码 481-486

年份 2003 

分类号 Q947.9 

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 

文摘内容 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。