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棉花学报  2013 

棉花GhMADS29启动子克隆及表达分析

DOI: 1002-7807(2013)04-0309-07, PP. 309-315

Keywords: 启动子,GUS染色,瞬时表达,表达分析

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Abstract:

以实验室克隆的GhMADS29(GeneBank登录号JQ682642)基因的cDNA序列Blast搜索雷蒙德氏棉的基因组序列,根据Blast结果设计引物,克隆到起始密码子上游-19位开始的1316bp的序列;利用PlantCARE启动子在线分析软件预测其含有核心启动子元件TATA-box和CAAT-box,并含有光、温、赤霉素、水杨酸、生长素等的响应元件。通过替换pBI121载体上的CaMV35S启动子构建了GhMADS29启动子与GUS基因的融合表达载体并转化拟南芥,组织化学染色分析发现其在14d幼苗的根和叶中都有表达,在萼片、花瓣、雌蕊、果瓣中也表达,而在雄蕊和种子中不表达。综上所述,我们推测GhMADS29可能与各种开花途径有关,与萼片、花瓣、雌蕊等花器官的发育有关,还可能与果实是否开裂有关。

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