%0 Journal Article
%T Responses of Ilex integra Thunb. Seedlings to Elevated Air Ozone Concentration<br>全缘冬青幼苗(Ilex integra Thunb.)对大气O3浓度升高的响应
%A ZHANG Wei-wei
%A NIU Jun-feng
%A FENG Zhao-zhong
%A WANG Xiao-ke
%A TIAN Yan
%A YAO Fang-fang
%A <br>张巍巍
%A 牛俊峰
%A 冯兆忠
%A 王效科
%A 田媛
%A 姚芳芳
%J 环境科学
%D 2011
%I 
%X One-year-old Ilex integra seedlings were exposed to charcoal-filtered (CF) and elevated ozone (E-O3, approximately 150 microL x L(-1)) for 84 days in six open-top chambers. Visible injury, growth parameters, pigments content, gas exchange, chlorophyll a fluorescence and antioxidant system were investigated during the growing season. At the end of experiment, foliage showed remarkable visible symptoms with dark-brown necrotic spots and patches which were concaved on the upper surface of the current-year leaves. Although relative height and diameter increment, total biomass and specific leaf weight (SLW) remained unaffected, E-O3 significantly decreased the percentage of stem biomass in total biomass. E-O3 induced significant decrease in net photosynthetic rate, chlorophyll a/b ratio and total phenolic compound content by 19%, 9% and 36%, respectively. However, stomatal conductance, intercellular CO2 concentration, chlorophyll a fluorescence parameters, pigment contents, MDA contents, total antioxidant capacity and total ascorbate content remained unaffected by E-O3. The results suggested that E-O3-induced change in components of chlorophyll contributed to the reduction of photosynthesis in Ilex integra seedlings. In addition, although visible symptom was found during the experiment, antioxidant system, most of the physiological parameters and growth were not significantly affected by E-O3.
%K ozone
%K Ilex integra
%K growth
%K photosynthesis
%K antioxidant system<br>臭氧
%K 全缘冬青
%K 生长
%K 光合作用
%K 抗性系统
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=4446B7224B065244071722DCED8F63A5&yid=9377ED8094509821&vid=9971A5E270697F23&iid=5D311CA918CA9A03&sid=1064BCC4A3CF441A&eid=19C6709C557F094B&journal_id=0250-3301&journal_name=环境科学&referenced_num=0&reference_num=38