连续两年紫外线-B辐射增强对玉米种子发芽及幼苗生长的影响  

Effects of enhanced UV-B radiation for two years on seed germination and seedling growth of maize

作　　者：王传海[1] 何都良[1] 郑有飞[1] 刘芳[1] 

机构地区：[1]南京气象学院环境科学系,江苏南京210044

出　　处：《农村生态环境》2003年第3期23-25,共3页Rural Eco-Environment

基　　金：国家自然科学基金资助项目(401750 2 9);海外青年学者合作研究基金(4002 850 3)

摘　　要：研究了在紫外线 (UV -B)辐射增强条件下与自然光下生长的玉米种子的发芽和幼苗生长特性以及对UV -B反应的变化。结果表明 :与自然光下生长的玉米种子相比 ,UV -B辐射增强条件下生长的玉米种子的发芽率和幼苗生长指标有不同程度的下降 ,但在连续两年UV -B强度增加条件下 ,其种子发芽和幼苗生长指标受高强度UV -B影响的程度显著下降。在连续两年UV -B辐射增强条件下生长的玉米种子萌发的幼苗叶片类黄酮含量显著高于在自然光下生长的玉米种子萌发的幼苗 ,这可能是在UV -B辐射增强条件下生长的玉米对UV -B辐射增强产生适应性的重要原因之一。Effects of enhanced UV-B radiation on germination of maize and growth of its seedlings was investigated.The results show that compared with the maize growing under natural light last year and this year,the germination and seedling growth of maize under enhanced UV-B radiation last year was decreased significantly,but the effects this year was not so significant on the seeds from the crop growing under enhanced UV-B radiation last year.The results of the experiment also show that maize seedlings out of the seeds yielded from the crop exposed to enhanced UV-B radiation last year have significantly more flavonoid content than those always growing under natural light,which might be in part attributed to the adaptation of the crop with the enhanced UV-B radiation.

关 键 词：UV-B辐射 玉米 发芽 幼苗生长 

分 类 号：X16[环境科学与工程—环境科学] S161.1[农业科学—农业气象学]