转铜/锌超氧化物歧化酶和抗坏血酸过氧化物酶基因马铃薯的耐氧化和耐盐性研究(英文)

被引:44
作者
汤莉 [1 ]
汤晖 [2 ]
KWAK SangSoo [3 ]
LEE HaengSoon [3 ]
王素英 [1 ]
杨晓丽 [4 ]
机构
[1] 天津市食品生物技术重点实验室天津商学院
[2] 黑龙江八一农垦大学生命科技学院
[3] Environmental Biotechnology Research Center,Research Institute of Bioscience and Biotechnology,Daejeon -,Korea
[4] 天津商学院生物技术与食品学院
关键词
抗氧化酶; 氧化胁迫; 盐胁迫; 转基因马铃薯;
D O I
10.13523/j.cb.20080305
中图分类号
Q943.2 [植物基因工程];
学科分类号
071007 [遗传学];
摘要
高盐等逆境可以加剧植物体内活性氧的产生,进而引起植物细胞死亡。为开发抗逆境作物,以置于氧化诱导型启动子下定位于叶绿体的转铜/锌超氧化物歧化酶(Cu/ZnSOD)和抗坏血酸过氧化物酶基因(APX)马铃薯为材料,研究了其对MV和NaCl所引起的氧化胁迫的耐受性。结果表明, MV胁迫下,转基因马铃薯叶片膜的相对电导率明显低于对照; NaCl胁迫下,其叶绿素含量高于对照。在含NaCl的培养基上,转基因幼苗生根率明显大于对照。另外,NaCl胁迫下转基因马铃薯叶片的SOD和APX酶活性显著高于对照,与其耐盐性的提高相一致。这些研究表明,转入Cu/ZnSOD和APX基因的马铃薯清除活性氧的能力增强,抗逆性得到提高。采用氧化诱导型启动子调控下的SOD和APX两个基因协同作用,使外源基因只有在逆境胁迫时才特异性表达,增强转基因植株的抗逆效果,为培育抗逆经济作物开阔了思路。
引用
收藏
页码:25 / 31
页数:7
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