%0 Journal Article
%T Effects of Elevated Ozone on Antioxidant System of Winter Wheat Leaf in Varied Growth Stages<br>O3浓度升高对不同生长期冬小麦叶片抗氧化系统的影响
%A Sui Lihu
%A Huang Yizong
%A Wang Wei
%A Geng Chunmei
%A Yin Baohui
%A <br>隋立华
%A 黄益宗
%J 生态毒理学报
%D 2011
%I 
%X As human population increases rapidly, human activities cause the increase of tropospheric ozone (O3) which significantly exerts adverse effects on the health of plants, animals and human beings. In this paper, open top chambers (OTCs) under field conditions were used to investigate the antioxidant system (malondialdehyde, MDA; soluble protein; ascorbic acid, AsA; glutathione, GSH, superoxide dismutase, SOD; peroxidase, POD; catalase, CAT; ascorbate peroxidase, APX; glutathione reductase, GR) of winter wheat leaf in different growing stages under elevated O3. The results indicated that the increase of O3 significantly affected the antioxidant system of winter wheat leaf both in jointing stage and heading stage. In the level of 120 nL·L-1, as compared with the control group, the activities of SOD, CAT and APX of winter wheat leaf in jointing stage decreased by 50.3%, 64.9% and 75.5%, while the POD and GR activity increased by 45.1% and 80.5%, respectively. The contents of MDA, AsA and GSH increased by 314.3%, 8.4% and 31.7%, respectively, and the content of soluble protein decreased by 47.5%. Different levels of O3 and different growing stages of winter wheat both resulted in different changes of substances in the antioxidant system. Under the stress of O3 pollution, the antioxidant system of winter wheat had an extremely complex change in order to prevent the damage caused by active oxygen species (AOS), which is the self-regulation of plants.
%K ozone
%K winter wheat
%K antioxidant system
%K ascorbate peroxidase (APX)
%K glutathione reductase (GR)<br>O3
%K 冬小麦
%K 抗氧化系统
%K 抗坏血酸过氧化物酶(APX)
%K 谷胱甘肽还原酶(GR)
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=BEC1F4700DD66C14D137590A0896A0AD&jid=B98D390DF92C35E6DD1987675E4EE86E&aid=8A9892E12714AC7FF708482A2256519A&yid=9377ED8094509821&vid=B31275AF3241DB2D&iid=94C357A881DFC066&sid=B7B25E832E7F23D8&eid=C4BBAD7A2DCC89BC&journal_id=1673-5897&journal_name=生态毒理学报&referenced_num=0&reference_num=0