摘要
通过大田试验,研究了UV-B辐射增强对不同生育期3个大麦(Hordeum vulgare)品种光合和蒸腾生理特性的影响。试验设对照(自然光)和辐射增强(辐照强度14.4 kJ.m-2.d-1)2个UV-B辐射水平。结果表明,UV-B辐射增强明显抑制大麦光合作用和蒸腾作用。与对照相比,UV-B辐射增强可降低叶片叶绿素含量、气孔导度、净光合速率和蒸腾速率,但对胞间CO2摩尔分数基本没有影响。不同大麦品种对UV-B辐射增强响应的敏感性存在差异,单2号对UV-B辐射增强较为敏感,而苏啤4号较不敏感。
A field experiment was conducted to investigate effects of enhanced ultraviolet-B（UV-B） radiation on physiological characteristics,e.g.photosynthesis and transpiration,of different cultivars of barley.The experiment was designed to have two levels of UV-B radiation,i.e.enhanced UV-B（14.4 kJ·m-2·d-1） and ambient UV-B,and conducted at the Agro-Meteorological Station,Nanjing University of Information Science and Technology,Jiangsu Province,China.Results show that enhanced UV-B obviously depressed photosynthesis and transpiration in all the barley cultivars.Compared with control,enhanced UV-B radiation significantly decreased chlorophyll content,stomatic conductance,net photosynthetic rate and transpiration rate,but generally had no effect on intercullular CO2 concentration in the leaves of the plants.However,the plants varied in sensitivity to UV-B radiation from cultivar to cultivar.Cultivar Dan #2 was more sensitive than Cultivar Su #4.
出处
《生态与农村环境学报》
CAS
CSSCI
CSCD
北大核心
2011年第4期51-55,共5页
Journal of Ecology and Rural Environment
基金
国家自然科学基金(40871151)
江苏省自然科学基金(BK2009413)
江苏大学生实践创新训练计划(10CX002)
江苏高校优势学科建设工程和江苏省"青蓝工程"联合资助项目
关键词
大麦
品种
UV-B辐射
净光合速率
气孔导度
胞间CO2摩尔分数
蒸腾速率
叶绿素含量
Hordeum vulgare
cultivar
ultraviolet-B radiation
net photosynthetic rate
stomatic conductance
intercullular CO2 concentration
transpiration rate
chlorophyll content
