%0 Journal Article
%T SO2-caused oxidative stress and modulation of some signal molecules in wheat<br>二氧化硫对小麦的氧化胁迫及其某些信号分子的调节
%A HAO Lin~
%A ZHANG Huiwen~
%A XU Xin~
%A TAO Siyuan~
%A YU Long~
%A <br>郝林 张惠文
%A 徐昕 陶思源
%A 于龙
%J 应用生态学报
%D 2005
%I 
%X By adding different concentration SO2 to culture boxes, this paper studied the responses of wheat seedling's superoxide anion radical O2*- and antioxidant enzymes to SO2. The results showed that when the concentration of SO2 was 10 and 40 microl x L(-1), the O2*- content and peroxidase (POD) and catalase(CAT) activities of wheat leaf were increased, while the activity of superoxide dismutase(SOD) was reduced. When the SO2 concentration was 50 microl x L(-1), the activities of POD and CAT were decreased, with the top end leaves appeared necrosis, and more fungi multiplied on green leaves. Presoaking wheat seeds with 1 mmol x L(-1) salicylic acid (SA) for 6 h or with 10 mmol x L(-1) H2O2 for 12 h could efficiently alleviate the oxidative stress caused by SO2, with the O2*- content decreased and the activities of test antioxidant enzymes increased. Under SO2 fumigation, ethylene significantly inhibited the activities of test enzymes, and promoted the O2*- production rate. When applying SA and ethylene at the same time, SA could almost completely eliminate the influences of ethylene on O2*- production and test enzyme activities.
%K SO_2
%K Wheat
%K Salicylic acid
%K Ethylene
%K Hydrogen peroxide<br>二氧化硫
%K 小麦
%K 水杨酸
%K 乙烯
%K 过氧化氢
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=42FEDDFE54F8BCD9D5FD1926ABDD7722&aid=851109DD0AB8A9EA&yid=2DD7160C83D0ACED&vid=7801E6FC5AE9020C&iid=B31275AF3241DB2D&sid=11924CB7A7AEB526&eid=9E5DBB98644FDC52&journal_id=1001-9332&journal_name=应用生态学报&referenced_num=9&reference_num=32