森林草莓FvZF-HD7基因的鉴定及表达分析
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1.福建农林大学 园艺学院 福州;2.福建农林大学 海峡联合研究院 园艺植物生物学及代谢组学研究中心 福州

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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,但是它们在草莓中的功能尚不清楚。本研究首先从森林草莓(Fragaria vesca)基因组数据库分离了10个ZF-HD家族的基因。制作进化树分析该基因家族的亲缘关系,将其按照亲缘关系远近分为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。其次利用荧光定量PCR检测了各基因在花中的表达量,发现其中FvZF-HD7在花中的表达量显著大于其它基因。进一步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。这些结果表明FvZF-HD7可能广泛参与了植物花发育和逆境胁迫调控。利用森林草莓‘Yellow Wonder 5AF7’(YW)的cDNA成功克隆该基因。生物学信息学分析表明该基因全长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。亚细胞定位分析表明该蛋白定位于细胞核中。本研究为在森林草莓中进一步分析ZF-HD基因家族的功能提供了理论与分子基础。

    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 firstly identified 10 genes of ZF-HD family from woodland strawberry and divided them into 6 subfamilies by analysis of the evolutionary relationship. By analysis the cis-element of the promoter, we find that there are many of the cis-element which related to the adversity stress and hormone response. We checked their expression level in flowers and find that FvZF-HD7 gene was expressed more abundant compared with other genes. Further more, the tissue organ specific expression analysis indicted that this gene is expressed highest in the flowers, but also expressed in leaves and stem. During fruit development, it is highly expressed in the earlier stage but decreased rapidly in the later stage. The result indicated that FvZF-HD7 may widely take part in the regulation of flower development and stress response. The gene was successfully cloned by using the cDNA of woodland strawberry ‘Yellow Wonder 5AF7’ (YW).The bioinformatics analysis suggested that the full length of this gene is 1 083 bp, encoding 360 amino acid. The sequence aligment indicate that the edcoded 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 subcellular localization analysis confirmed that this protein exclusively localizes in the nucleus. This research laid the theoretical and molecule foundation for studying the function of ZF-HD in woodland strawberry.

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  • 收稿日期:2019-10-14
  • 最后修改日期:2019-12-12
  • 录用日期:2019-12-13
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