Decoding G-Quadruplexes Sequence in Vitis vinifera: Regulatory Region Enrichment, Drought Stress Adaptation, and Sugar-Acid Metabolism Modulation
文献类型： 外文期刊
作者： Xie, Jun 1 ; Song, Kangkang 3 ; Qiao, Gaixia 2 ; Wang, Rong 2 ; Wu, Hongyuan 4 ; Jia, Qiaoxia 2 ; Liu, Yujuan 2 ; Li, Yi 1 ; Xu, Meilong 5 ;
作者机构： 1.Gansu Agr Univ, Coll Forestry, Lanzhou 730070, Peoples R China
2.State Key Lab Efficient Prod Forest Resources, Yinchuan 750004, Peoples R China
3.Shandong Agr Univ, Coll Forestry, Tai'an 271018, Peoples R China
4.Beijing Anling Ecol Construct Co Ltd, Beijing 102300, Peoples R China
5.Ningxia Acad Agr & Forestry Sci, Hort Res Inst, Yinchuan 750012, Peoples R China
关键词：
期刊名称：PLANTS-BASEL （ 影响因子：4.1； 五年影响因子：4.5 ）
ISSN： 2223-7747
年卷期： 2025 年 14 卷 8 期
页码：
收录情况： SCI
摘要： G-quadruplexes play a crucial role in transcription, translation, and DNA replication in plant genomes. Here, we comprehensively examined the prevalence and functions of G-quadruplexes in Vitis vinifera. A total of 467,813 G-quadruplexes were identified in grapevine genome, with enrichment in the promoter (0.54/kbp) and near transcription start sites (TSSs, 1.00/kbp), and showed conservative strand preference. The G-quadruplex density in centromeres exhibited heterogeneity. The differentially expressed genes (DEGs) under two-day drought stress manifested high G-quadruplex density in the promoter and TSS regions. The upregulated DEGs showed template strand-biased G-quadruplex enrichment, while downregulated DEGs displayed coding strand dominance linked to metal ion homeostasis and sugar-acid metabolism pathways, respectively. G-quadruplexes were enriched in key sugar-acid metabolism genes, including pyruvate kinase and sucrose synthase. The number of G-quadruplexes in sucrose transferase VINV genes was higher than that in the CWINV and NINV genes. This study revealed G-quadruplexes as regulatory elements of stress response and berry development, providing abundant genetic targets for precision breeding and the quality improvement of grapevines.
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