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园艺学报 ›› 2010, Vol. 37 ›› Issue (12): 1919-1919–1928.

• 果树 • 上一篇    下一篇

银杏查尔酮合成酶基因启动子(GbCHSP)调控元件及功能分析

李琳玲1,*,程 华1,*,程水源1,**,许 锋2,王 燕2,姜德志2   

  1. (1黄冈师范学院生命科学与工程学院,湖北黄冈 438000;2长江大学园艺园林学院,湖北荆州 434025)
  • 收稿日期:2010-09-07 修回日期:2010-12-04 出版日期:2010-12-25 发布日期:2010-12-25
  • 通讯作者: 李琳玲

Regulatory Elements and Functional Analysis of Chalcone Synthase Gene Promoter from Ginkgo biloba L.

LI Lin-ling1,*,CHENG Hua1,*,CHENG Shui-yuan1,**,XU Feng2,WANG Yan2,and JIANG De-zhi2   

  1. (1College of Life Science and Engineering,Huanggang Normal University,Huanggang,Hubei 438000,China;2College of Horticulture and Gardening,Yangtze University,Jingzhou,Hubei 434025,China)
  • Received:2010-09-07 Revised:2010-12-04 Online:2010-12-25 Published:2010-12-25
  • Contact: LI Lin-ling

摘要: 通过染色体步移方法从银杏(Ginkgo biloba L.)基因组中克隆到查尔酮合成酶基因(CHS)翻译起始位点上游1 711 bp的启动子序列。生物信息学分析表明,该启动子片段中存在多个顺式作用元件,包括紫外/蓝光响应单元、植物激素响应单元、真菌诱导元件、MYB结合位点、TATA-box和CAAT-box等。亚克隆了CHS转录起始位点上游1 402 bp序列,将其与GUS基因构建融合表达载体pBI121 + CHSP,以pBI121-35S作为负对照,通过农杆菌(LBA4404)介导法分别转入烟草。结果表明,银杏CHS启动子序列能驱动GUS基因在烟草中的表达,表达具有组织特异性。GbCHSP的功能研究将有助于揭示银杏叶黄酮的积累与GbCHS基因表达的分子机理。

关键词: 银杏, 查尔酮合成酶基因启动子, GUS, 调控元件分析

Abstract: The regulative sequence(1 711 bp)of chalcone synthase gene promoter(CHSP)from Ginkgo biloba L. was cloned by genomic walking. In silico analysis suggested that the sequence contained several typical cis-acting elements,including UV/blue light responsive elements,phytohormone responsive elements,fungal elicitor responsive elements,MYB binding site,TATA-box and CAAT-box. A 1 402 bp promoter sequence upstream 5′ of translation start site of GbCHS was cloned and designated as GbCHSP,respectively. pBI121 + CHSP and pBI121-35S were constructed and transformed into tobaccos by LBA4404. These results showed that pBI121 and pBI121 + CHSP both could drive the transient expression of GUS in tobaccos and pBI121 + CHSP expressed differentially in root,stem and leaf tissues of tobacco. These results will be help to understand the transcriptional regulatory mechanism on GbCHS expression and flavonoids accumulation.

Key words: Ginkgo biloba L., chalcone synthase gene promoter, GUS, the analysis of cis-element

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