葡萄VvARF18调控果实膨大及其互作蛋白筛选

doi:10.16420/j.issn.0513-353x.2024-0594

摘要/Abstract

摘要： 为探究葡萄VvARF18在果实发育中的分子机制，以‘红地球’葡萄（Vitis vinifera‘Red Globe’）为材料，克隆了VvARF18基因，对其进行生物信息分析；将该基因在番茄中异源过表达以验证其对果实发育的影响。VvARF18基因CDS长度为2 109 bp，编码703个氨基酸，pI为6.50。系统进化分析表明，VvARF18与河岸葡萄（Vitis riparis）VrARF18蛋白的亲缘关系最近；在番茄中异源过表达，T₃代转基因番茄果实纵横径显著高于野生型，其体积与单果质量明显增加，表明VvARF18对果实膨大具有正调控的作用；转录激活试验发现VvARF18没有毒性但具有自激活活性，筛选与其保守功能结构域B3-Auxin存在互作的蛋白，发现其与信号复合体VvCOP9存在潜在互作关系。

关键词: 葡萄, VvARF18, 亚细胞定位, 功能验证, 酵母双杂

Abstract: In order to investigate the molecular mechanism of grape VvARF18 in fruit development，‘Red Globe’grapes（Vitis vinifera‘Red Globe’）were used as materials，the VvARF18 gene was cloned，and analyzed for its bioinformatics，and the gene was heterologously overexpressed in tomato to verify its effect on fruit development. The CDS of the VvARF18 gene was 2 109 bp in length，coding for 703 amino acids，with a pI of 6.50. Phylogenetic analysis showed that VvARF18 was the closest related to the VrARF18 protein of Vitis riparis；the gene was heterologously overexpressed in tomato. Expression，the longitudinal and transverse diameters of T₃ generation transgenic tomato fruits were significantly higher than those of the wild type，and its volume and single fruit mass were significantly increased，suggesting that VvARF18 has a positive regulatory effect on fruit expansion；transcriptional activation assay found that VvARF18 was not toxic but had self-activating activity，and screening of proteins interacting with its conserved functional structural domain B3-Auxin revealed a potential interplay relationship with the signaling complex VvCOP9.

Key words: grape, VrARF18, subcelluar localization, functional verification, yeast two-hybrid

中图分类号:

S 663.1

梁靖, 曾宝珍, 梁国平, 毛娟, 陈佰鸿. 葡萄VvARF18调控果实膨大及其互作蛋白筛选[J]. 园艺学报, 2025, 52(4): 821-834.

LIANG Jing, ZENG Baozhen, LIANG Guoping, MAO Juan, CHEN Baihong. Grapevine VvARF18 Regulates Fruit Expansion and Screening of its Interacting Proteins[J]. Acta Horticulturae Sinica, 2025, 52(4): 821-834.

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