两种外源化学物影响PEG胁迫对水稻根系的伤害.pdf

文档介绍：,33(4):439-442:.,李芳,管冬冬,[J].广西植物,2013,33(4):439-442FengHQ,LiF,GuanDD,[J].Guihaia,2013,33(4):439-442两种外源化学物影响PEG胁迫对水稻根系的伤害冯汉青?,李芳,管冬冬,贾凌云(西北师范大学生命科学学院,兰州730070)摘要::PEG6000胁迫抑制了水稻幼根的生长,降低了相对含水量、增加了HO含量,??L二甲基硫脲(过氧化氢内源消除剂,dimethylthiourea,DMTU)预处理水稻幼根能明显降低PEG胁迫下水稻幼根过氧化氢的含量,缓解细胞死亡和相对含水量的降低,,用1mmol??L水杨基氧肟酸(交替氧化酶专一性抑制剂,salicylhydroxamicacid,SHAM)预处理水稻幼根能显著降低水稻幼根的生长和相对含水量,,:过氧化氢;抗氰呼吸;水稻;渗透胁迫中图分类号::A文章编号:1000G3142(2013)04G0439G04EffectsoftwoexogenouschemicalsubstancesontheosmoticstressGinduceddamagestoricerootsFENGHanGQing?,LIFang,GUANDongGDong,JIALingGYun(CollegeofLifeSciencesNorthwestNormalUniversity,Lanzhou730070,China)Abstract:,deGcreasedtherelativewatercontent,inceasedtheHOcontent,??Ldimethylthiourea(DMTU),ascavengerofHO,significantlydecreasedtheincrementintheHOcontentandparGtiallyalleviatedtherootcelldeathandthedecreaseo