大豆bZIP转录因子基因GmbZIP33的克隆与功能分析
- Title:
- Protein Feature and Genetic Evolution Analysis of Fatty Acid Desaturase FAD3 in Soybean
- 摘要:
- 碱性亮氨酸拉链(basic leucine zipper,bZIP)蛋白是真核生物所特有的一类转录因子,广泛参与植物生长、发育、生理代谢的调控过程。为探究大豆bZIP转录因子的功能,本研究通过PCR技术从大豆中克隆bZIP转录因子编码基因GmbZIP33(Glyma.03G219300.1),利用生物信息学方法对该基因及其编码的蛋白质进行分析,利用荧光定量PCR检测该基因的时空表达模式及其对逆境的响应能力,通过创制GmbZIP33过表达拟南芥植株分析其对植株表型与开花相关基因的影响。结果表明:GmbZIP33基因位于大豆第3号染色体上,编码区全长453 bp。GmbZIP33与bZIP转录因子家族的GmbZIP41序列同源性高达91.4%,属于S-bZIPs亚族成员。GmbZIP33响应高盐、干旱胁迫,其在叶片中表达量最高,且在短日条件下表现出明显的昼夜节律模式,推测其可能参与到光周期调控开花的复杂网络中。通过拟南芥植物异位过表达GmbZIP33发现,转基因拟南芥植株表现出早花表型且引起FT等开花相关基因表达量上升,说明GmbZIP33可参与到拟南芥的开花调控途径中并有效促进植物开花,本研究对深入理解GmbZIP33转录因子在植物生长发育过程中的多调控性能奠定了基础。
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