中文摘要：

以同期种植的云南报春花为试验材料，利用获得的云南不同纬度、不同海拔高度，而经度差异不大的4个试验点的UV—B辐射观测资料，初步研究了低纬高原地区不同UV—B辐射强度变化对云南报春花丙二醛、可溶性蛋白质的影响。结果表明，UV—B辐射强度从2～5月呈上升趋势，辐射值最高为丽江点，5月份达12．90w·m^-2，相对来说高海拔地区的紫外辐射强度较强，各试验点报春花叶片的丙二醛含量以3、4月份较高，可溶性蛋白质含量以2、4月份较高。随着UV—B辐射强度增强，报春花丙二醛含量先升高后降低，叶片丙二醛含量也较高，不同生育期丙二醛含量不同，其含量以开花期和结实期最高；而随着uV—B辐射强度的变化，各实验点报春花叶片蛋白质含量变化不一致，不同生育期可溶性蛋白质含量不同，其含量以开花期为最高。

英文摘要：

Utilize the UV-B radiation strength datum of five-test place in Yunnan province,which located in different latitude and different elevation but similarly in the same longitude. At the same time plant primula as experimental material,then determine the content of MDA and soluble protein in plant leaves,analysis the effects of the low latitude and high elevation region＇s UV-B radiation on the content of MDA and soluble protein. The results shows that from February to May the UV-B radiation strength was increased, the maximum appeared in Lijiang（12.90 w·m^-2 in May） ;the low latitude and high elevation region＇s UV-B radiation was much higher than high latitude and low elevation region＇ s; the primula leaves content of MDA was much higher during Match and April, but the higher content of soluble protein appeared in February and April. The result shows that： with the increase of the UV-B radiation strength, the content on MDA increased at first and then; in higher UV-B radiation region the content of MDA was also higher;during different physiology time the content of MDA showing difference, the higher content emerge in flowering and fruiting duration;but with the variation of UV-B radiation strength the change of the soluble protein showing diversity in test place; during different physiology time the content of soluble protein showing variant, the higher content emerge in flowering period.