栽培草莓潜在印记基因FaTRG31的克隆与特征分析
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国家自然科学基金(31872056)


Cloning and Characterization Analysis of FaTRG31 of Potential Imprinting Gene in Fragaria×ananassa
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    摘要:

    在前期通过筛选获得草莓候选印记基因FaTRG31(turgorresponsive protein 31)的基础上,以八倍体栽培草莓‘红颜’(Fragaria×ananassa Duch. ‘Benihoppe’)为材料,对FaTRG31基因的编码序列进行克隆、生物信息学、组织表达、启动子和印记特性分析,以揭示该基因的作用机理,为草莓印记基因表达调控及生物学功能研究奠定基础。结果显示:(1)草莓FaTRG31基因开放阅读框(ORF)全长999 bp,编码332个氨基酸,含有典型的AsnProAla(NPA)基序和6个跨膜结构,定位于细胞质膜,属于典型的AQP蛋白(aquaporin)家族;系统进化树深入分析表明FaTRG31为PIPs(plasma intrinsic proteins)亚家族1型蛋白。(2)草莓FaTRG31在不同组织中均有表达,胚乳中的表达量最高,且在FaTRG31基因上游克隆出的1 989 bp启动子序列中发现含有与胚乳特异表达相关的作用元件,此外还有多种非生物胁迫响应元件和激素响应元件等。(3)草莓印记特性分析结果显示,FaTRG31在胚乳中的SNP(single nucleotide polymorphism)位点处测序峰为单峰且是母本表达,即该基因在栽培草莓胚乳中为母本表达印记基因。(4)非生物胁迫处理后分析发现,草莓FaTRG31基因能在不同程度上响应非生物胁迫。

    Abstract:

    Based on the screening of strawberry candidate imprinting gene FaTRG31(turgor responsive protein 31), Using ‘Benihoppe’ (Fragaria×ananassa Duch. ‘Benihoppe’) as the material, we cloned the coding sequence of FaTRG31 gene, and analyzed bioinformatics, tissue expression, promoter and imprinting characteristics to reveal the mechanism of action of this gene and to lay the foundation for the study of expression regulation and biological functions of strawberry inprinted genes. The results showed that: (1) the open reading frame (ORF) of strawberry FaTRG31 gene was 999 bp, encoded 332 amino acids, contains typical NPA structural units and six transmembrane regions, located in the plasma membrane and belonged to AQP(aquaporin) family; Phylogenetic tree analysis showed that FaTRG31 belonged to PIP1(plasma membrane intrinsic proteins subtype 1). (2) Strawberry FaTRG31 was expressed in different tissues, and the expression in endosperm was the highest. The 1 989 bp promoter sequence of FaTRG31 showed that it contained action elements related to endosperm specific expression, a variety of abiotic stress response elements and hormone response elements. (3) The results of strawberry imprinting characterization showed that FaTRG31 had a single peak at the SNP (single nucleotide polymorphism) site in the endosperm was single peak and female parent expression, and the gene was expressed by the female parent in the strawberry endosperm. (4) Analysis after abiotic stress treatments revealed that the strawberry FaTRG31 gene could respond to abiotic stress to varying degrees.

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安 琪,张 红,怀欣佳,等.栽培草莓潜在印记基因FaTRG31的克隆与特征分析[J].西北植物学报,2022,42(7):1103-1112

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  • 在线发布日期: 2022-08-22
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