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核农学报  2013 

水稻Osε-cop1基因表达模式及功能的初步分析

DOI: 10.11869/hnxb.2013.09.1276, PP. 1276-1284

Keywords: 水稻,Osε-cop1,表达,RNA干涉,功能分析

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Abstract:

ε-COP是真核生物中COPI有被小泡的一个亚基,其在植物中的生物学功能还未见报道。本研究对水稻中编码ε-COP亚基的基因进行了生物信息学分析,对其中的Osε-cop1基因进行了时空表达分析,构建了Osε-cop1的RNA干涉载体并转化水稻,对转化植株的表达特性和表型性状进行了分析。生物信息学分析结果表明,编码ε-COP的两个基因有很高的序列一致性,其中的Osε-COP1蛋白与玉米、拟南芥和大豆同源蛋白也具有较高的序列一致性,分别为83%、68%和62%;时空表达分析结果表明,Osε-cop1在穗部特异表达,且在减数分裂期幼穗中表达量最高。RNA干涉的研究结果表明,Osε-cop1的表达下调造成植株穗顶部死亡,暗示该基因对水稻穗的发育具有重要作用。本研究初步揭示了Osε-cop1在水稻中的功能,为进一步研究COPI有被小泡在植物中的功能奠定了基础。

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