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植物研究 ›› 2011, Vol. 31 ›› Issue (5): 550-557.doi: 10.7525/j.issn.1673-5102.2011.05.007

• 论文 • 上一篇    下一篇

新牧一号杂花苜蓿MvNHX1基因的表达分析和提高烟草耐盐性的研究

张桦1,2;张富春3*;张雨良4;张博1;陈全家2   

  1. 1.新疆草地资源与生态重点实验室,乌鲁木齐 830052;2.新疆农业大学农业生物技术重点实验室,乌鲁木齐 830052;3.新疆生物资源基因工程重点实验室,新疆大学生命科学与技术学院,乌鲁木齐 830046;4.中国热带农业科学院热带生物技术研究所,海口 571101
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2011-09-20 发布日期:2011-09-20
  • 通讯作者: 张富春
  • 基金资助:
     

Expressional Analysis of MvNHX1 in Medicago varia Xinmu-1 and Enhancing the Salt Tolerance of Tobacco

ZHANG Hua;ZHANG Fu-Chun*;ZHANG Yu-Liang;ZHANG Bo;CHEN Quan-Jian   

  1. 1.Xinjiang Key Laboratory of Grassland Resources and Ecology,Xinjiang Agricultural University,Urumqi 830052;2.Key Laboratory of Agricultural Biotechnology,Xinjiang Agricultural University,Urumqi 830052;3.Xinjiang Key Laboratory of Biological Resources and Genetic Engineering,College of Life Science and Technology,Xinjiang University,Urumqi 830046;4.Institute of Tropical Bioscience and Biotechnology,Chinese Academy of Tropical Agricultural Science,Haikou 571101
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-09-20 Published:2011-09-20
  • Contact: ZHANG Fu-Chun
  • Supported by:
     

摘要: 提取新牧一号杂花苜蓿的总RNA,用特异引物RT-PCR扩增后的cDNA片段连接入pMD19-T载体,转化大肠杆菌DH5α,对阳性克隆进行序列分析,新牧一号苜蓿NHX1(MvNHX1)全长1 626 bp,Genbank登录号为:EU375310。半定量RT-PCR和实时荧光定量PCR分析表明,在盐胁迫下MvNHX1基因的表达均上调。构建重组植物表达载体pBI121-MvNHX1后,通过农杆菌介导的叶盘法转化烟草,转基因烟草在盐胁迫下发芽率和生物量均高于非转基因烟草,表明MvNHX1能够提高转基因烟草的耐盐性。

关键词: 新牧一号苜蓿, MvNHX1, 克隆, 序列分析, 耐盐性

Abstract: The total RNA of Medicago varia xinmu-1 was extracted, the cDNA fragment amplified by RT-PCR using special primer was linked into pMD19-T vector and transformed into Escherichia coli DH5α. By sequencing the positive clone, the MvNHX1(EU375310) is 1 626 bp long. RT-PCR and real-time PCR assays showed that the level of MvNHX1 transcription was up-regulated and reached a steady higher level in the seedlings after high salinity treatment. The MvNHX1 gene was transformed into tobacco via agrobacterium mediation after the plant expression vectors pBI121-MvNHX1 was successfully constructed. The germination rate and biomass of the transgenic tobacco were taller than those of the control group under NaCl stress, indicating that the MvNHX1 can enhance the salt tolerance of transgenic tobacco.

Key words: Medicago varia xinmu-1, MvNHX1, clone, sequence, salt tolerance

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