麦田常用除草剂对弱筋小麦生理生化特性的影响  

Effects of Herbicides on Physiology and Biochemistry of Weak-Gluten Wheat

作　　者：王正贵[1] 封超年[1] 郭文善[1] 夏玉荣[1] 朱新开[1] 李春燕[1] 彭永欣[1] 

机构地区：[1]扬州大学江苏省作物遗传生理重点实验室扬州大学小麦研究所,江苏扬州225009

出　　处：《农业环境科学学报》2010年第6期1027-1032,共6页Journal of Agro-Environment Science

基　　金：江苏省"六大人才高峰"项目(07-G-008);国家自然科学基金项目(30671224;30971729);江苏省农业支撑计划项目(BE2008366-1;BE2009426);江苏省高校自然科学重大基础研究项目(07KJAZ1022)

摘　　要：采用室外小区试验方法,研究了麦田常用的苯磺隆、使它隆、异丙隆、骠马、绿麦隆5种除草剂对弱筋小麦扬麦13生理生化特性的影响。结果表明,用药后5d,5种除草剂处理均导致小麦叶绿素相对含量(SPAD值)不同程度下降。除草剂严重影响了光合速率,几乎所有处理光合速率均受到抑制,异丙隆倍量处理抑制率最大,达27%。小麦体内SOD活性明显受到除草剂影响,表现为先升高、后逐渐恢复至对照水平;POD活性也表现为先升高后降低的趋势,多数处理药后30d低于对照;CAT活性对除草剂比较敏感,用药后5d即显著升高,其后影响逐步减小,直至药后30d恢复到对照水平;除草剂对MDA含量影响相对较小,多数处理MDA含量与对照差异不显著。Effects of five kinds of herbicides（tribenuron-methyl,fluroxypyr,isoproturon,puma super,chlorotoluron）on physiology and biochemistry of weak-gluten whea（tYangmai 13）were studied.The results showed that all of the five herbicides caused decline of SPAD values in wheat leaves at different degrees on the 5th day after treating（DAT）.All herbicide treatments resulted in serious impacts on photosynthetic rate,and inhibitied significantly of the photosynthetic rates.The maximum of photosynthetic rate was decreased by 27% compared with control.Superoxide Dismutase（SOD）activity was significantly affected by the herbicide.It arised at first,then returned gradually to the control level.Activity of peroxidase（POD）increased first,and then decreased,but was lower than that of the control on the 30th DAT.Catalase（CAT） activity was sensitive to herbicide,which increased significantly on the 5th DAT,then gradually reduced until it returned to the control level.The effects of herbicides on malondialdehyde（MDA）content were relatively small.MDA content began to increase after herbicides spraying,but had no significant difference compared with control.

关 键 词：除草剂 弱筋小麦 生理学 生物化学 负效应 

分 类 号：X503.231[环境科学与工程—环境工程]