NAC047/052/104 Synergistically Regulate the Dark-Induced Leaf Senescence in Non-Heading Chinese Cabbage

文献类型： 外文期刊

第一作者： Yang, Bing

作者： Yang, Bing;Meng, Zitong;Cao, Mengqin;Song, Yishan;Yang, Bing;Zhang, Dingyu;Meng, Zitong;Yin, Yijiang;Yang, Xiao;Cao, Mengqin;Li, Ruixin;Zhu, Hongfang

作者机构：

关键词： NHCC; dark; NACs; leaf senescence

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：4.9； 五年影响因子：5.7 ）

ISSN： 1661-6596

年卷期： 2025 年 26 卷 5 期

页码：

收录情况： SCI

摘要： Non-heading Chinese cabbage (NHCC) is an important vegetable, and its leaves are harvested for consumption. Thus, the initiation and progression of leaf senescence in NHCC directly impact its yield and quality. In multiple plant species, NAC transcription factors are known to act as critical regulators of leaf senescence. However, in NHCC, the NAC transcription factors contributing to leaf senescence regulation remain to be identified, and the mechanisms underlying dark-induced leaf senescence remain unclear. To explore the molecular mechanisms of leaf senescence in NHCC, we stored NHCC away from light and subsequently examined dark-induced transcriptional alterations via RNA sequencing. Interestingly, three NAC transcription factors, BrNAC047, BrNAC052, and BrNAC104, were found to be potently activated by darkness. Subsequently, the virus-induced gene silencing of BrNAC047, BrNAC052, and BrNAC104 demonstrated that these three NACs act as positive regulators of dark-induced leaf senescence in NHCC. Dual-luciferase assays further confirmed that BrNAC047, BrNAC052, and BrNAC104 directly activate the promoters of certain senescence-associated genes. This study uncovers the molecular signaling pathways governing dark-induced leaf senescence in NHCC, highlighting the role of three key regulators and offering valuable molecular targets for delaying leaf senescence in NHCC.

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