%0 Journal Article
%T Intraspecific differences in physiological responses of different wheat cultivars to enhanced UV-B radiation<br>不同小麦品种对UV-B辐射增强响应的生理特性差异
%A HE Lilian
%A ZU Yanqun
%A LI Yuan
%A WU Yusheng
%A <br>何丽莲
%A 祖艳群
%A 李元
%A 吴渝生
%J 应用生态学报
%D 2006
%I 
%X In this paper, field studies were conducted to determine the potential of alterations in physiology, and the intraspecific differences in sensitivity of 10 wheat (Triticum aestivum) cultivars to enhanced UV-B radiation. The supplemental UV-B radiation was 5.00 kJ x m(-2), simulating a depletion of 20% stratospheric ozone in Kunming area. The results showed that six of 10 tested wheat cultivars showed significant changes in total chlorophyll content, among which, chlorophyll a was strongly reduced, but chlorophyll b was reduced to a lesser extent, leading to a decrease in chlorophyll a/b ratio. The effects of UV-B on MDA and flavonoid contents also showed intraspecific difference. The MDA content of 5 cultivars was significant increased, while that of 2 cultivars was decreased. Four cultivars had significantly increased flavonoid content, but the flavonoid content in 2 cultivars was significantly decreased. The changes of chlorophyll and flavonoid contents were significantly correlated with the content of MDA(r = -0.78, P < 0.01 and r = -0.75, P < 0.05 respectively). There was a correlation between flavonoid and anti-UV-B radiation of wheat.
%K UV B radiation
%K Triticum aestivum
%K Chlorophyll
%K Flavonoid
%K MDA
%K Intraspecific difference<br>UV-B辐射
%K 小麦
%K 叶绿素
%K 类黄酮
%K 丙二醛
%K 种内差异
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=42FEDDFE54F8BCD9D5FD1926ABDD7722&aid=93652D0C562263B9&yid=37904DC365DD7266&vid=BCA2697F357F2001&iid=CA4FD0336C81A37A&sid=D5C9DC4EF2F78008&eid=31611641D4BB139F&journal_id=1001-9332&journal_name=应用生态学报&referenced_num=6&reference_num=31