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林业科学 ›› 2007, Vol. 43 ›› Issue (03): 39-45.doi: 10.11707/j.1001-7488.20070307

• 论文及研究报告 • 上一篇    下一篇

毛白杨纤维素合酶基因(PtoCesA1)的克隆及其在烟草中的遗传转化

李春秀 齐力旺 史胜青 汪阳东 王建华 张守攻   

  1. 中国林业科学研究院林业研究所细胞生物学实验室,北京100091
  • 收稿日期:2005-12-09 修回日期:1900-01-01 出版日期:2007-03-25 发布日期:2007-03-25

Isolation and Transformation in Nicotiana tabacum of a Cellulose Synthase Gene (PtoCesA1) from Populus tomentosa

Li Chunxiu,Qi Liwang,Shi Shengqing,Wang Yangdong,Wang Jianhua,Zhang Shougong   

  1. Laboratory of Cell Biology, Research Institute of Forestry, CAF Beijing 100091
  • Received:2005-12-09 Revised:1900-01-01 Online:2007-03-25 Published:2007-03-25

摘要:

克隆毛白杨纤维素合酶基因(PtoCesA1),全长为3215bp,与欧洲颤杨的PtrCesA1基因的同源性为97%,具有开放的阅读框,编码区在52~2988碱基之间,为2937bp。构建PtoCesA1基因的全长正义植物表达载体为pBIPA1,经酶切和PCR鉴定确认载体构建正确。通过农杆菌介导的方法将pBIPA1表达载体转入烟草中,转基因植株的纤维细胞壁厚度和木质部厚度都有不同程度的下降,形态表征为植株明显变矮,叶片变小。

关键词: 毛白杨, 纤维素合酶基因, 遗传转化

Abstract:

A cellulose synthase gene(PtoCesA1), isolated from Populus tomentosa, was 3 215 bp long with an opening reading frame of 2 937 bp extending from nucleotides 52~2 988. Comprison of the nucleotide sequence of PtoCesA1 with PtrcesA1 from Populus tomentosa showed 97% identity. The full length PtoCesA1 cDNA was subcloned into pBI121 and identified by digestion, then transformed into Nicotiana tabacum by leaf disc. The transgenic plants with PtoCesA1 had small leaves, and “dwarf” phenotype,consistent with a loss of xylem and fiber cell wall thickness。

Key words: Populus tomentosa, PtoCesA1, transformation