Histone demethylase MaJMJ15 is involved in the regulation of postharvest banana fruit ripening

文献类型： 外文期刊

第一作者： Zeng, Jing

作者： Zeng, Jing;Jiang, Guoxiang;Liang, Hanzhi;Yan, Huiling;Kong, Xiangjin;Duan, Xuewu;Li, Zhiwei;Zeng, Jing;Jiang, Guoxiang;Liang, Hanzhi;Yan, Huiling;Kong, Xiangjin;Duan, Xuewu;Li, Zhiwei;Duan, Xuewu;Duan, Xuewu;Li, Zhiwei;Duan, Xuewu

作者机构：

关键词： Histone demethylation; JmjC domain-containing proteins; JMJ; Fruit ripening; Banana

期刊名称：FOOD CHEMISTRY （ 影响因子：8.8； 五年影响因子：8.6 ）

ISSN： 0308-8146

年卷期： 2023 年 407 卷

页码：

收录情况： SCI

摘要： Histone methylation plays important roles in plant development. However, the role of histone methylation in fruit ripening remains unclear. Here, a total of 16 Jumonji domain-containing proteins (JMJs) were identified from banana genome. During fruit ripening, expression of MaJMJ15 was significantly upregulated. Exogenous ethylene accelerated the upregulation whereas 1-methylcyclopropene delayed the process, suggesting that MaJMJ15 positively regulates banana fruit ripening. MaJMJ15 is an H3K27me3 site-specific demethylase. Transient overexpression of MaJMJ15 promoted banana fruit ripening. Moreover, the global H3K27me3 was decreased by MaJMJ15. Furthermore, MaJMJ15 directly targeted several key ripening-related genes (RRGs) in banana including NAC transcription factor 1/2 (MaNAC1/2), 1-aminocyclopropane-1-carboxylate synthase 1 (MaACS1), 1-aminocyclopropane-1-carboxylate oxidase 1 (MaACO1) and expansin 2 (MaEXP2), removed H3K27me3 from their chromatin, and activated their expression. Our data suggest that MaJMJ15 is an H3K27me3 demethylase, which is involved in the regulation of banana fruit ripening by activating expression of key RRGs via removal of H3K27me3.

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