In order to study the expression pattern of 4CL gene promoter and explore its potential application in plant genetic engineering,4CL promoter fragment was amplified by PCR method from Populus tomentosa genome DNA.

• 为研究4CL基因启动子在转基因植物中的表达特性；探索其在植物基因工程研究中的潜在应用价值；利用PCR方法从毛白杨基因组DNA中扩增得到了4CL启动子片段.