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水稻脱氧合酶-3基因启动子的特性分析

DOI: 10.7685/j.issn.1000-2030.2008.04.001, PP. 1-7

Keywords: 脂氧合酶-3基因,启动子,水稻,转基因植株,逆境胁迫

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Abstract:

从栽培水稻品种越光中克隆了水稻脂氧合酶-3基因(Lox-3)的启动子,长度为1343bp,其序列与日本晴对应的序列完全相同。生物信息学分析表明,该启动子序列中包含受信号诱导的元件(G-box)、温度响应元件(CCGAAA)和水分胁迫响应元件(CACATG)等顺式作用元件;进一步构建了Lox-3基因启动子与gus和gfp基因的融合表达载体并获得转基因植株,发现报告基因在转基因植株的根、茎、叶、花药、种胚及种皮中均有表达,在萌发种子的胚和胚芽中也有表达,但在胚乳中不表达。此外,经ABA、NaCl及人工陈化处理后对报告基因的表达进行了定量分析,发现这些非生物胁迫可能通过诱导启动子顺式元件致使报告基因表达活性增强。

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