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• 研究报告 • 上一篇    下一篇

热激启动子18.2在金鱼草中启动下游基因表达最适温度条件的筛选

宋倩娜1,2,刘琛1,高振蕊1,2,李莹1,2,张弛1,2,崔敏龙1**   

  1. (1中国科学院沈阳应用生态研究所, 污染生态与环境工程重点实验室, 沈阳 110016; 2中国科学院大学, 北京 100049)
  • 出版日期:2014-09-10 发布日期:2014-09-10

Optimal temperature for hsp18.2 promoter in gene expression of anthocyanin biosynthesis of Antirrhinum majus.

SONG Qian-na1,2, LIU Chen1, GAO Zhen-rui1,2, LI Ying1,2, ZHANG Chi1,2, CUI Min-long1**   

  1. (1Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; 2 University of Chinese Academy of Sciences, Beijing 100049, China)
  • Online:2014-09-10 Published:2014-09-10

摘要:

为了研究温度对植物根系中基因表达的影响,构建了由拟南芥小热激蛋白18.2基因的启动子和金鱼草中调控花青素生物合成的基因(Rosea1)组成的植物表达载体pBIPhsp::ROS,利用遗传转化法得到毛状根,以根系颜色变化为指标,探讨了温度变化对植物根系基因表达的影响。结果表明:37、40和42 ℃热激处理4 h后,在毛状根中均能观察到一定程度的花青素积累;在42 ℃条件下处理8 h时,转基因毛状根颜色变化最深;RT-CR分析表明,Rosea1基因的表达水平与毛状根着色呈正相关。该体系可作为温度对植物根系影响研究的一种指示标记和手段。

 

关键词: 小叶杨, 内在水分利用效率, 土地利用方式, 稳定碳同位素, 树轮

Abstract: To clarify the impact of temperature change on gene expression in roots, we made a plant expression vector pBIPhsp::ROS, which harbors a MYB gene Rosea1 controlling anthocyanin biosynthesis in Antirrhinum majus and the promoter of small heatshock protein 18.2 of Arabidopsis. We obtained hairy roots by genetic transformation. Moreover, we investigated the impact of temperature change on gene expression in roots. The results showed that anthocyanin accumulations were observed in the transgenic hairy roots under treatment of 37, 40 and 42 ℃ for 4 h, and the deepest coloration was detected in the treatment of 42 ℃ for 8 h. In addition, by the method of RT-PCR, the expression of Rosea1 was detected in the hairy roots treated at 37, 40 and 42 ℃, and a significant correlation between expression pattern and anthocyanin accumulation was found. Therefore, our result suggests that the pBIPhsp::ROS is a useful marker and a tool for the study of the effect of temperature change on gene expression in roots.

Key words: Populus simonii, stable carbon isotope, tree rings, land use type, intrinsic water-use efficiency