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草业学报 ›› 2014, Vol. 23 ›› Issue (5): 161-167.DOI: 10.11686/cyxb20140518

• 论文 • 上一篇    下一篇

Ta6-SFT基因对油菜的转化及抗旱性分析

李淑洁1,张正英2*   

  1. 1.甘肃省农业科学院生物技术研究所,甘肃 兰州 730070;
    2.甘肃省农业科学院科研管理处,甘肃 兰州 730070
  • 收稿日期:2014-03-24 出版日期:2014-10-20 发布日期:2014-10-20
  • 通讯作者: Email: Kegc8@sina.com
  • 作者简介:李淑洁(1980-),女,甘肃临夏人,助理研究员,硕士。E-mail:sjli2005@aliyun.com
  • 基金资助:

    本研究由甘肃省科技支撑计划(1011NKCA073),甘肃省农业科学院科技创新专项(2009GAAS17)资助

Expression of the Ta6-SFT gene in Brassica napus under drought stress

LI Shu-jie1,ZHANG Zheng-ying2   

  1. 1.Institute of Biotechnology, Gansu Academy of Agricultural Sciences, Lanzhou 730070, China;
    2.Scientific Research Management Office, Gansu Academy of Agricultural Sciences, Lanzhou 730070, China
  • Received:2014-03-24 Online:2014-10-20 Published:2014-10-20

摘要:

为了研究Ta6-SFT对油菜抗旱的影响,进行了Ta6-SFT对油菜纯系材料的遗传转化,获得经PCR、Southern杂交和Northern 斑点杂交验证的转基因植株。对7株T1代转基因油菜进行了为期36 d的干旱胁迫,分析干旱胁迫36 d和复水后2 d各植株及野生型对照中的Ta6-SFT的转录水平表达和果聚糖含量,同时进行同时期丙二醛含量和相对电导率测定。结果表明,Ta6-SFT的转录水平表达与转基因植株体内的果聚糖含量、转基因植株的抗旱性呈正相关,表明Ta6-SFT在干旱胁迫下的表达增强了转基因植株的抗旱性。

Abstract:

Fructan is thought to be one of the important regulators involved in plant tolerance to various abiotic stresses. In this study the Triticum aestivum gene for sucrose: fructan 6-fructosyltransferase synthesis (Ta6-SFT) was transferred into Brassica napus, driven by the rd29A promoter and mediated by Agrobacterium tumefaciens. Subsequently, transgenic plants were identified using PCR, southern blot and northern dot blot tests. In order to test the effect of the Ta6-SFT gene on transgenic plants under drought stress, non-transgenic plants (control) and 7 transgenic plants (T1 generation) were exposed to 36 days of moisture stress. Expression of Ta6-SFT was tested using a semi-quantitative RT-PCR 36 days after treatment and 2 days after re-watering. Fructan concentration and physiological traits including relative conductivity and MDA content were analyzed at the same times. The results showed Ta6-SFT expression level is positively associated with fructan content and resistance to drought stress, indicating that the Ta6-SFT gene could enhance resistance to drought in transgenic plants.

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