甘蓝型油菜BnaFIL基因启动子的克隆与表达分析  

Cloning and Expression Analysis of BnaFIL Gene Promoter in Brassica napus L.

作　　者：陈静 胡蓉[1] 刘勇[1] 秦艺 熊兴华[1] CHEN Jing;HU Rong;LIU Yong;QIN Yi;XIONG Xinghua(Crop Gene Engineering Key Laboratory of Hunan Province,Hunan Agricultural University,Changsha 410125,China)

机构地区：[1]湖南农业大学,作物基因工程湖南省重点实验室,湖南长沙410125

出　　处：《华北农学报》2022年第3期53-59,共7页Acta Agriculturae Boreali-Sinica

基　　金：农业农村部转基因重大专项(SQ2018ZD080068);国家重点研发计划项目(2017YFD0101703)。

摘　　要：为了进一步了解启动子在甘蓝型油菜FIL基因(BnaFIL)表达调控中的作用,根据甘蓝型油菜基因组数据,以甘蓝型油菜叶片提取的DNA为模板,对甘蓝型油菜BnaFIL基因的启动子序列pBnaFIL进行克隆,长度为1326 bp。采用PlantCARE在线分析软件对该启动子序列进行生物信息学序列分析,结果表明,该序列含有参与光反应的部分保守DNA模块以及CAAT-box和TATA-box等核心启动子必备元件,与分生组织表达有关的顺式作用的调控元件CAT-box以及光敏反应元件。通过该启动子序列替换pBI121植物表达载体上的CaMV35S启动子,使该启动子与GUS基因融合获得pBnaFIL-GUS表达载体,将载体通过农杆菌花序浸染的方法转入拟南芥中,获得了早花启动子重组质粒阳性转基因株系和晚花启动子重组质粒阳性转基因株系。之后对转基因拟南芥植株进行GUS染色分析,对启动子的表达效果进行了检测,最终在不同的转基因拟南芥植株中均发现了GUS基因的表达。结果表明,早花材料与晚花材料中启动子表达强弱存在差异,早花材料启动子的驱动基因表达效果比晚花材料启动子的驱动效果要好,由此推断,启动子的驱动效果对油菜开花早晚进行了调控,导致FIL基因在不同材料中的表达效果不一致。To further understand the role of the promoter in the regulation of the expression of the Brassica napus FIL gene(BnaFIL),it used the DNA extracted from the leaves of Brassica napus as a template based on the genomic data of Brassica napus.For cloning,the length was 1326 bp.Using PlantCARE online analysis software to perform bioinformatics sequence analysis on the promoter sequence,the results showed that the sequence contained some conserved DNA modules involved in the photoreaction and essential elements for core promoters such as CAAT-box and TATA-box.Expression related cis-acting regulatory elements CAT-box and photosensitive response elements.Replace the CaMV35S promoter on the pBI121 plant vector with the promoter sequence,fused the promoter with the GUS gene to obtain the pBnaFIL-GUS expression vector,and transfer the vector into Arabidopsis thaliana by the method of Agrobacterium inflorescence.Flower promoter recombinant plasmid-positive transgenic lines and late flower promoter recombinant plasmid-positive transgenic lines.After that,GUS staining analysis was performed on the transgenic Arabidopsis plants,and the expression effect of the promoter was tested.Finally,the GUS gene expression was found in different transgenic Arabidopsis plants.The results showed that there were differences in promoter expression between early-flowering materials and late-flowering materials.The promoters of early-flowering materials could drive gene expression better than those of late-flowering materials.It was inferred from this that the driving effect of the promoter regulates the early and late flowering of rape,resulting in different expression effects of the FIL gene in different materials.

关 键 词：甘蓝型油菜 BnaFIL基因 启动子 GUS染色 表达载体 

分 类 号：Q78[生物学—分子生物学] S635.03[农业科学—蔬菜学]