| 光诱导和组成型启动子控制柠檬酸合酶基因过量表达对转基因烟草耐铝性影响的比较 |
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| 引用本文： | 王奇峰,胡清泉,赵玥,易琼,李昆志,玉永雄,陈丽梅.光诱导和组成型启动子控制柠檬酸合酶基因过量表达对转基因烟草耐铝性影响的比较[J].浙江大学学报(农业与生命科学版),2011,37(1). |
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| 作者姓名： | 王奇峰 胡清泉 赵玥 易琼 李昆志 玉永雄 陈丽梅 |
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| 作者单位： | 1. 昆明理工大学,生命科学与技术学院,生物工程技术研究中心,云南,昆明,650224
2. 西南大学,动物科技学院,重庆,400716 |
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| 基金项目： | 国家重点基础研究发展计划"973"资助项目 |
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| 摘 要： | 分别用光诱导型启动子(PrbcS)和组成型启动子(CaMV 35S)驱动柠檬酸合酶基因(cs)在转基因烟草中过量表达,比较转基因烟草中柠檬酸的含量和分泌量及其铝耐受性的变化.结果表明:诱导型转基因株系的CS酶活性是野生型的2.3～2.4倍,组成型转基因株系的酶活性是野生型的1.6～2倍;在30 μmol·L-1铝胁迫下,诱导型转基因植株的根相对伸长量是野生型的2.8～2.9倍,组成型的根相对伸长量是野生型的2～2.3倍;在无铝或300 μmo1·L-1铝胁迫下,转基因烟草叶片和根中柠檬酸含量均高于野生型,其中诱导型转基因植株叶片中柠檬酸含量高于组成型转基因植株,转基因烟草柠檬酸的分泌量分别是野生型的1.8～2.0倍和3.0～3.3倍;在有铝胁迫的珍珠岩基质上培养时,转基因烟草的生长情况好于野生型.这些结果证明,与CaMV 35S相比,采用PrbcS启动子控制cs基因的过量表达可更有效地增加转基因烟草中CS的酶活性及叶片中柠檬酸的合成量,同时也能更有效地提高转基因烟草柠檬酸的分泌量,从而增强其对铝毒害的抵御能力.
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| 关 键 词： | 柠檬酸合酶 铝耐受性 转基因烟草 光诱导启动子 组成型启动子 |
Comparison study on effects of overexpressing citrate synthase driven by light-inducible promoter and constitutive promoter on Al tolerance of transgenic tobacco plants |
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| WANG Qi-feng,HU Qing-quan,ZHAO Yue,YI Qiong,LI Kun-zhi,YU Yong-xiong,CHEN Li-mei.Comparison study on effects of overexpressing citrate synthase driven by light-inducible promoter and constitutive promoter on Al tolerance of transgenic tobacco plants[J].Journal of Zhejiang University(Agriculture & Life Sciences),2011,37(1). |
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| Authors: | WANG Qi-feng HU Qing-quan ZHAO Yue YI Qiong LI Kun-zhi YU Yong-xiong CHEN Li-mei |
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| Institution: | WANG Qi-feng1,HU Qing-quan1,ZHAO Yue1,YI Qiong1,LI Kun-zhi1,YU Yong-xiong2,CHEN Li-mei1 (1.Biology Engineering and Technology Research Centre,Life Science and Technology School,Kunming University of Science and Technology,Kunming 650224,China,2.College of Zoological Science and Technology,Southwest University,Chongqing 400716,China) |
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| Abstract: | Overexpression of citrate synthase(cs) cDNA of tobacco was driven by the light-inducible promoter of rubisco small subunit(PrbcS) and the constitutive promoter CaMV 35S(35S) in transgenic tobacco plants,respectively.The changes in citrate contents and exudations as well as Al tolerances in transgenic PrbcS and 35S tobacco plants were compared.The results showed that CS enzyme activities were increased 2.3-2.4 folds and 1.6-2 folds in transgenic PrbcS and 35S tobacco plants as compared with wild tobacco(WT) ... |
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| Keywords: | citrate synthase Al tolerance transgenic tobacco light-inducible promoter constitutive promoter |
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