›› 2011, Vol. 23 ›› Issue (4): 0-666.

• 作物科学 •    

转化GmWRKY21基因提高大豆耐低温性的研究

胡小丽1,2,董德坤2,杨海英2 ,杨清华2,朱丹华2,*   

  1. 1浙江师范大学 化学与生命科学学院,浙江 金华 321004;2浙江省农业科学院 作物与核技术利用研究所,浙江 杭州 310021
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2011-07-25 发布日期:2011-07-25

Transformation of GmWRKY21 gene to enhance the low freezing tolerance ability of soybean

HU Xiao-li;DONG De-kun;YANG Hai-ying;YANG Qing-hua;ZHU Dan-hua;*   

  1. 1College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, China; 2Institute of Crops and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-07-25 Published:2011-07-25

摘要: 利用农杆菌介导的带一片子叶的胚尖转化法将耐低温相关转录因子基因GmWRKY21转入‘浙春5号’和‘中黄13’两个大豆品种中,以探讨通过转基因手段创造耐低温种质的可能性。转基因植株经目的基因的PCR检测和转化T-DNA区域构建特异性的PCR检测得以确认。转基因植株较非转基因对照表现出明显的耐低温性:胁迫处理前和处理后转基因植株相对电导率均显著低于对照植株;在恢复生长以后,转基因植株均能正常生长、开花、结荚,而非转基因对照在处理后的7~10 d内枯萎死亡。试验结果初步表明GmWRKY21基因已经成功导入大豆基因组中并参与了对低温的胁迫应答,进而提高了大豆的抗低温胁迫能力。

关键词: 大豆, GmWRKY21, 低温, 农杆菌介导法

Abstract: Transcription factor gene GmWRKY21 was introduced into two soybean varieties ‘Zhechun No.5’ and ‘Zhonghuang 13’ via Agrobacterium-mediated transformation system. Embryonic tips jointed with one piece of cotyledon severed as explants in this study. Transformation events were confirmed using target gene-specific and construct-specific PCR analysis. Transgenic plants showed significantly lower electric conductivity than their non-transgenic controls before and after chilling treatment. Better low temperature tolerability of transgenic plants was confirmed after recovered for days: the transgenic plants grew normally, while their controls died in 7 to 10 days after chilling treatment. These results indicated that GmWRKY21 gene had been introduced into soybean genome and it's likely that this gene participated in response to low temperature stress, and finally led to an improved cold tolerance in soybean.

Key words: soybean, GmWRKY21, low temperature, Agrobacterium-mediated transformation