Interaction of VvDELLA2 and VvCEB1 Mediates Expression of Expansion-Related Gene during GA-Induced Enlargement of Grape Fruit
文献类型： 外文期刊
作者： Liu, Zhenhua 1 ; Wang, Yan 1 ; Guan, Pingyin 3 ; Hu, Jianfang 3 ; Sun, Lei 1 ;
作者机构： 1.Beijing Acad Agr & Forestry Sci, Inst Forestry & Pomol, Beijing Engn Res Ctr Deciduous Fruit Trees, Beijing 100093, Peoples R China
2.Beijing Engn Res Ctr Deciduous Fruit Trees, Beijing 100093, Peoples R China
3.China Agr Univ, Coll Hort, Beijing 100193, Peoples R China
关键词： GA(3); cell expansion; VvDELLA2; VvCEB1; grape; early fruit enlargement
期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.6； 五年影响因子：6.2 ）
ISSN： 1661-6596
年卷期： 2023 年 24 卷 19 期
页码：
收录情况： SCI
摘要： Exogenous gibberellin treatment can promote early growth of grape fruit, but the underlying regulatory mechanisms are not well understood. Here, we show that VvDELLA2 directly regulates the activity of the VvCEB1 transcription factor, a key regulator in the control of cell expansion in grape fruit. Our results show that VvCEB1 binds directly to the promoters of cell expansion-related genes in grape fruit and acts as a transcriptional activator, while VvDELLA2 blocks VvCEB1 function by binding to its activating structural domain. The exogenous gibberellin treatment relieved this inhibition by promoting the degradation of VvDELLA2 protein, thus, allowing VvCEB1 to transcriptionally activate the expression of cell expansion-related genes. In conclusion, we conclude that exogenous GA3 treatment regulates early fruit expansion by affecting the VvDELLA-VvCEB1 interaction in grape fruit development.
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