南京林业大学学报(自然科学版) ›› 2011, Vol. 35 ›› Issue (06): 1-5.doi: 10.3969/j.jssn.1000-2006.2011.06.001

• 研究论文 •    下一篇

ptr-MIR156a启动子克隆及特征分析

陈英,王浩然,许庆,黄敏仁*   

  1. 南京林业大学杨树种质创新与品种改良重点实验室,江苏南京210037
  • 出版日期:2011-11-28 发布日期:2011-11-28
  • 基金资助:
    收稿日期:2011-07-19修回日期:2011-09-19基金项目:国家林业局林业公益性行业科研专项项目(200904048)作者简介:陈英(1973—),副教授。*黄敏仁(通信作者),教授。Email: njmrhuang@njfu.cn。

Clone and characterization of ptr-MIR156a promoter in Populus trichocarpa

CHEN Ying,WANG Haoran,XU Qing,HUANG Minren*   

  1. Poplar Germplasm Enhancement & Variety Improvement Lab, Nanjing Forestry University, Nanjing 210037, China
  • Online:2011-11-28 Published:2011-11-28

摘要: miR156a在火炬松、烟草、拟南芥中的表达与病原菌侵染密切相关。为了研究miR156a在杨树与病原菌互作过程中分子机制,以毛果杨全基因组DNA为材料,预测ptr-MIR156a启动子的大概区域,设计特异性PCR引物,克隆了ptr-MIR156a上游启动子区500、1 000和1 500 bp片段,并进行顺式作用元件分析,然后分别构建了绿色荧光蛋白(GFP)报告基因植物表达载体,最后通过原生质体的瞬时表达体系对其进行了活性检测。结果表明,1 500 bp片段活性最高,1 000 bp片段次之,500 bp片段活性最低。

Abstract: MicroRNAs (miRNAs) are endogenous small RNAs that have large regulatory effects development and stress responses in plants. Recently studies show that the expression of miR156a is intensively related with pathogens infection in Loblolly pine, tobacco, Arabidopsis and maize. To understand the interaction mechanism between miR156a and poplar, we predicted ptr-MIR156a promoter region and amplified three upstreaming fragments of ptr-MIR156a from Populus trichocarpa, 500 bp, 1 000 bp, and 1 500 bp, respectively,analyzed their cisacting elements, then cloned them into plant expression vectors, pMDC83 and transferred into poplar protoplasts. Fluorescence results showed that they drove GFP gene expression at different levels. Based on this result, we could transfer theses fragments into plants and study ptr-miR156a expression patterns and regulation mechanism in the future.

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