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普通小麦RAV基因家族全基因组鉴定及表达分析

Genome-wide Identification and Expression Pattern Analysis of RAV Gene Family in Wheat (Triticum aestivum)

  • 摘要: RAV转录因子属于B3超家族,是植物特有的转录因子家族。本研究从普通小麦(Triticum aestivum)中鉴定获得了57个RAV家族成员,根据是否含有AP2结构域,普通小麦RAV家族成员可分为两类,其中含有AP2结构域的有26个成员。表达谱分析发现,普通小麦RAV基因家族中有19个基因在人工合成的细胞分裂素6-苄氨基嘌呤处理下表达量升高,25个基因在脱落酸处理下表达量降低。通过分析普通小麦RAV家族基因在胁迫处理下的表达谱,挑选出4个在干旱和高温处理下表达量下调的基因,并利用RT-qPCR确定了它们在干旱和高温胁迫下的表达模式。亚细胞定位分析显示这4个基因编码的蛋白都定位于细胞核。本研究为普通小麦RAV转录因子的功能研究和利用提供了有效参考。

     

    Abstract: RAV transcription factors belong to B3 superfamily which is a specific transcription factor family in plants. In this study, 57 RAV family members are identified in wheat(Triticum aestivum). Wheat RAV family members can be classified into two groups based on whether it contains AP2 domain. There are 26 members containing AP2 domains in RAV family. Expression profiles analysis show that 19 genes from RAV gene family up-regulated under synthetic cytokinin 6-benzyl aminopurine treatment and 25 genes down-regulated under abscisic acid treatment. Four genes down-regulated under drought and heat stresses are selected by analyzing the expression profiles of wheat RAV family genes treated by abiotic stresses, and the expression patterns of these four genes are validated by RT-qPCR. Subcellular localization analysis suggest that the proteins coded by the four genes are localized in nucleus. This study provide a reliable reference for the functional research and utilization of wheat RAV transcription factors.

     

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