中国农业科技导报 ›› 2016, Vol. 18 ›› Issue (4): 17-23.DOI: 10.13304/j.nykjdb.2015.761

• 生物技术 生命科学 • 上一篇    下一篇

KcERF-PeDREB2a双价基因对棉花干旱、盐碱耐受性的影响

董雪妮1,2,高丽华2,丁梦琦1,周美亮2,唐益雄2,李金博3,邵继荣1*,吴燕民2*   

  1. 1.四川农业大学生命科学学院, 四川 雅安 625001; 2.中国农业科学院生物技术研究所, 北京 100081;
    3.深圳市铁汉生态环境股份有限公司, 广东 深圳 518000
  • 收稿日期:2015-12-30 出版日期:2016-08-15 发布日期:2016-04-08
  • 通讯作者: 邵继荣,教授,博士生导师,主要从事植物代谢及系统进化研究。E-mail:shaojr007@163.com;吴燕民,研究员,博士生导师,主要从事植物分子生物学与基因工程研究。E-mail:wuym65@sina.com
  • 作者简介:董雪妮,硕士研究生,主要从事植物分子生物学研究。E-mail:dongxueni627@126.com。
  • 基金资助:
    国家转基因生物新品种培育重大专项(2014ZX08005-004);广东省省级科技计划项目(2015B090904008)资助。

Effect of Bivalent Gene KcERF-PeDREB2a on Drought and Salt Tolerance of Cotton

DONG Xue-ni1,2, GAO Li-hua2, DING Meng-qi1, ZHOU Mei-liang2, TANG Yi-xiong2, LI Jin-bo3, SHAO Ji-rong1*, WU Yan-min2*   

  1. 1.College of Life Sciences, Sichuan Angricultural University, Sichuan Yaan 625001;
    2.Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081;
    3.Shenzhen Techand Ecology Environmental Limited by Share Ltd, Guangdong Shenzhen 518000, China
  • Received:2015-12-30 Online:2016-08-15 Published:2016-04-08

摘要: 利用农杆菌介导法将耐旱耐盐转录因子基因PeDREB2a和KcERF导入受体材料陆地棉R15中,获得12个株系的转基因植株,通过硫酸卡那霉素初筛以及PCR分子检测最终获得7个转KcERF-PeDREB2a基因的棉花株系。通过测定转基因棉花的抗逆相关生理指标以及对基因相对表达量测定分析,结果表明,200 mmol/L的NaCl和15%的PEG-6000胁迫处理后,转基因棉花幼苗的CAT、SOD活性,游离脯氨酸含量均高于对照组,MDA含量较对照组棉花明显下降。实时定量RT-PCR结果表明,干旱胁迫下,转基因棉花幼苗叶片中PeDREB2a基因的表达量高于KcERF基因的表达量;高盐胁迫下,转基因棉花叶片中的PeDREB2a,KcERF基因的相对表达量持平。本研究结果表明,在干旱、高盐胁迫下,KcERF-PeDREB2a基因有助于提高棉花的耐旱耐盐能力。

关键词:
农杆菌,
转基因棉花, 耐旱耐盐, 生理指标, 相对表达量

Abstract: Transcription factor gene PeDREB2a and KcERF were inserted to the upland cotton R15 mediated by agrobacterium and 12 strains of transgenic plants were obtained. Through kanamycin screening and molecular testing, 7 generation strains with PeDREB2a and KcERF were obtained. This paper measured the physiological indexes related to stress tolerance and analyzed relative exprsssion of genes, and the results showed that under the stress of 200 mmol/L NaCl and 15% PEG-6000, the activity of CAT and SOD, free proline content of transgenic cotton seedling  were higher than the control, the MDA content significantly lower than control. Real-time PCR results showed that under drought stress, PeDREB2a relative expression in transgenic cotton seedling leaf was higher than KcERF; under salt stress, PeDREB2a and KcERF relative expression in transgenic cotton was flat. This suggested that KcERF-PeDREB2a contributed to improve the drought and salt tolerance ability in cotton.

 

Key words: Agrobacterium, transgenic cotton, drought and salt stress, physiological indexes, relative expression