森林草莓FvZFHD7基因的鉴定及表达分析
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福建农林大学海峡联合研究院园艺中心科研启动经费


Identification and Expression Analysis of FvZFHD7 Gene from Woodland Strawberry
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    摘要:

    锌指同源蛋白ZFHD(zinc finger homeodomain)家族是植物中所特有的一类转录因子家族,在响应植物逆境胁迫,调控花发育以及种子寿命等方面具有重要作用,但其在草莓中的功能尚不清楚。该研究从森林草莓(Fragaria vesca)基因组数据库分离获得了10个ZFHD家族的基因。进化树分析显示,按照亲缘关系远近该基因家族可分为6个不同的亚族;启动子顺式元件分析发现,该基因家族基因的启动子区域含有较多的逆境胁迫和激素响应相关的元件。荧光定量PCR检测发现,FvZFHD7基因在花中的表达量显著大于其他基因;组织特异性表达分析表明,FvZFHD7基因在花中表达量最高,在叶和茎中也有表达,在果实发育的前期表达量较高,而在果实发育后期急剧降低。利用森林草莓‘Yellow Wonder 5AF7’(YW)的cDNA成功克隆到FvZFHD7基因,生物学信息学分析表明FvZFHD7基因全长1 083 bp,编码360个氨基酸;序列比对结果显示,其编码的蛋白质同时含有ZF以及HD保守结构域;蛋白质的相对分子质量为39 153.89 Da,结构中富含α螺旋和无规则卷曲。成功构建表达载体pGWB5FvZFHD7,将目的基因载体转入烟草中,Confocal激光共聚焦显微镜观察发现,转基因烟草的细胞核中检测到GFP信号,表明FvZFHD7蛋白定位于细胞核中。研究表明,FvZFHD7可能广泛参与了植物花发育和逆境胁迫调控,为进一步分析森林草莓ZFHD基因家族的功能奠定了理论与分子基础。

    Abstract:

    The ZFHD (zinc finger homeodomain) protein family is one kind of plant specific transcription factor family which plays important roles during stress response, flower development and seeds longevity of plant, but their function in strawberry is unknown. This study isolated and obtained 10 genes of ZFHD family from woodland strawberry (Fragaria vesca). The phylogenetic tree indicated that this gene family can be divided into 6 subfamilies according to the evolutionary relationship. The analysis of the ciselement of the promoter indicated that there are a large number of ciselements which related to the adversity stress and hormone response. The qRTPCR analysis indicted that FvZFHD7 expressed more abundant compared with other genes. The tissue organ specific expression analysis indicted that FvZFHD7 expressed the highest in the flowers, but also expressed in leaves and stem and it is highly expressed in the earlier stage, but decreased rapidly in the later stage during fruit development. The FvZFHD7 gene was successfully cloned by using the cDNA of woodland strawberry ‘Yellow Wonder 5AF7’ (YW). The bioinformatics analysis suggested that the full length of FvZFHD7 is 1 083 bp, encoding 360 amino acid. The sequences alignment indicated that the encoded protein possesses both ZF and HD conserved domains. The molecular weight of the protein is expected to be 39 153.89 Da with abundant αhelix and random coil. The expression vector pGWB5FvZFHD7 was successfully constructed and the GFP signal was detected in the nucleus of the transgenic tobacco by transfer the target gene into the tobacco and observed under laser Confocal microscope which indicated that FvZFHD7 protein localizes in the nucleus. The study indicated that FvZFHD7 may widely take part in the regulation of flower development and stress response.

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刘 敏,名川信吾.森林草莓FvZFHD7基因的鉴定及表达分析[J].西北植物学报,2020,40(1):19-27

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  • 在线发布日期: 2020-04-02
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