作物学报 ›› 2017, Vol. 43 ›› Issue (06): 849-854.doi: 10.3724/SP.J.1006.2017.00849
胡海燕,刘迪秋,李允静,李阳,涂礼莉*
HU Hai-Yan,LIU Di-Qiu,LI Yun-Jing,LI Yang,TU Li-Li*
摘要:
棉花纤维是研究单细胞生长发育的良好模式细胞, 寻找在棉花纤维发育时期优势表达的启动子,对于棉花纤维发育的功能基因组研究非常重要。本试验对发掘到的一个在纤维伸长期优势表达基因GhFLA1的启动子进行克隆,并将该启动子融合GUS转化棉花和烟草。转基因棉花的GUS蛋白染色表明,在0~20 DPA (days post anthesis)的纤维中检测到GUS蛋白,同时在柱头、雄蕊、萼片、胚根、子叶和根中也检测到GUS蛋白,但在花瓣、叶片和苞叶中没有检测到。同时GUS定量检测结果显示,pGhFLA1驱动GUS蛋白积累的高峰是在20 DPA的纤维中,其驱动GUS表达的能力是CaMV 35S::GUS的22倍。转基因烟草组织化学染色显示pGhFLA1可以驱动GUS在叶片及叶片的表皮毛中优势表达,同时在子房、柱头、花药、苞叶、花柄基部、花瓣、种子等生殖器官上也存在GUS蛋白。启动子pGhFLA1在棉花纤维和烟草叶片的表皮毛中优势表达,可用于棉花纤维功能基因组研究,在改良纤维品质育种中具有潜在的应用价值。
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