Epigenomic mechanism regulating the quality and ripeness of apple fruit with differing harvest maturity
文献类型： 外文期刊
作者： Wang, Jing 1 ; Wang, Jiahe 1 ; Li, Yu 1 ; Lv, Yongqian 1 ; Zhao, Juan 2 ; Li, Hao 2 ; Zhang, Bo 2 ; Zhang, Mengsheng 2 ; Tian, Jianwen 3 ; Li, Xiaolong 3 ; Xing, Libo 1 ;
作者机构： 1.Northwest A&F Univ, Coll Hort, Yangling, Shaanxi, Peoples R China
2.Northwest A&F Univ, Coll Mech & Elect Engn, Yangling, Shaanxi, Peoples R China
3.Ningxia Acad Agr & Forestry, Yinchuan, Peoples R China
期刊名称：PHYSIOLOGIA PLANTARUM （ 影响因子：6.4； 五年影响因子：5.9 ）
ISSN： 0031-9317
年卷期： 2024 年 176 卷 2 期
页码：
收录情况： SCI
摘要： Harvest maturity significantly affects the quality of apple fruit in post-harvest storage process. Although the regulatory mechanisms underlying fruit ripening have been studied, the associated epigenetic modifications remain unclear. Thus, we compared the DNA methylation changes and the transcriptional responses of mature fruit (MF) and immature fruit (NF). There were significant correlations between DNA methylation and gene expression. Moreover, the sugar contents (sucrose, glucose, and fructose) were higher in MF than in NF, whereas the opposite pattern was detected for the starch content. The expression-level differences were due to DNA methylations and ultimately resulted in diverse fruit textures and ripeness. Furthermore, the higher ethylene, auxin, and abscisic acid levels in MF than in NF, which influenced the fruit texture and ripening, were associated with multiple differentially expressed genes in hormone synthesis, signaling, and response pathways (ACS, ACO, ZEP, NCED, and ABA2) that were regulated by DNA methylations. Multiple transcription factor genes involved in regulating fruit ripening and quality via changes in DNA methylation were identified, including MIKCC-type MADS-box genes and fruit ripening-related genes (NAP, SPL, WRKY, and NAC genes). These findings reflect the diversity in the epigenetic regulation of gene expression and may be relevant for elucidating the epigenetic regulatory mechanism underlying the ripening and quality of apple fruit with differing harvest maturity.
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