短期增补UV-B辐射处理对美丽风毛菊光合色素和紫外吸收物质的影响  

Effects of Short-term Increased UV-B Radiation on Photosynthetic Pigments and UV-B Absorbing Compounds in Saussurea superba

作　　者：师生波[1] 尚艳霞[1,2] 朱鹏锦[1,2] 杨莉[1,2] 

机构地区：[1]中国科学院西北高原生物研究所高原生物适应与进化重点实验室,青海西宁810001 [2]中国科学院研究生院,北京100049

出　　处：《青海师范大学学报（自然科学版）》2011年第4期44-47,共4页Journal of Qinghai Normal University(Natural Science Edition)

基　　金：国家自然科学基金课题(30670307;30570270;30170154)资助项目;国际科技合作重点项目计划(2002CB714006)

摘　　要：以中国科学院海北高寒草甸生态系统定位研究站地区的美丽风毛菊为材料,通过短期增补UV-B辐射的模拟试验,研究了叶片光合色素和紫外吸收物质含量对增强UV-B的响应.不同处理天数的取样分析表明,与对照UV-A相比,增补UV-B+UV-A处理时光合色素有增高的趋势,紫外吸收物质含量也略有增高.说明高山植物叶片中丰富的黄酮类物质能有效保护光合机构,短期内UV-B辐射强度的增加所加剧的色素光氧化现象并不严重,受叶片增厚的影响单位叶片面积的光合色素含量有增加趋势.The short--term field experiments of UV--B supplementation studying were conducted with alpine plant Saussurea superba in Haibei Alpine Meadow Ecosystem Research Station area. The photosyn-thetic pigments and UV--B absorbing compounds were measured after 5, 10 and 15 days of treatment. The results indicated that compared with control UV--A treatment, there were an increasing of the photosynthetic pigments after enhancement of UV--B radiation （UV--B＋UV--A） treatment, and UV--B absorbing compounds were also having small increasing trend. These means that high contents of UV--B absorbing compounds could provide effective protection on photosynthetic function in alpine plants, and shortterm of UV-- B supplement have no additional photo-- oxidation on photosynthetic pigments. Benefited with increase of leave thickness, there was an increased trend of the photosynthetic pigments contents when based on leave area.

关 键 词：高山植物 光合色素 紫外吸收物质 UV-B辐射 

分 类 号：S718[农业科学—林学]