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The MaNAP1-MaMADS1 transcription factor module mediates ethylene-regulated peel softening and ripening in banana

文献类型： 外文期刊

作者： Li, Hua 1 ; Chen, Zhuo 1 ; Zhu, Wenjun 1 ; Ni, Xueting 1 ; Wang, Junru 1 ; Fu, Lufeng 1 ; Chen, Jialin 1 ; Li, Tianpu 1 ; Tang, Lingxian 1 ; Yang, Yingjie 1 ; Zhang, Fukun 1 ; Wang, Jiashui 3 ; Zhou, Biyan 4 ; Chen, Faxing 1 ; Lu, Peitao 1 ;

作者机构： 1.Fujian Agr & Forestry Univ, Haixia Inst Sci & Technol, Coll Hort, Ctr Plant Metabol, Fuzhou 350002, Peoples R China

2.Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, Natl Key Lab Trop Crop Breeding, Sanya 572024, Peoples R China

3.Chinese Acad Trop Agr Sci, Trop Crops Genet Resources Inst, Key Lab Crop Gene Resources & Germplasm Enhancemen, Minist Agr, Haikou 571101, Peoples R China

4.South China Agr Univ, Coll Hort, Guangzhou 510642, Peoples R China

期刊名称：PLANT CELL （ 影响因子：11.6； 五年影响因子：12.1 ）

ISSN： 1040-4651

年卷期： 2024 年 37 卷 1 期

页码：

收录情况： SCI

摘要： The banana ( Musa spp.) peel undergoes rapid softening during ripening, leading to finger drop and a shortened shelf life. The regulatory mechanism behind this process remains to be elucidated. In this study, we confirmed the role of peel softening in banana finger drop and uncovered the underlying transcriptional regulatory network. Cell wall-related (CWR) genes were substantially upregulated in both the peel and finger drop zone during ethylene-induced ripening. Transcriptome analysis and genome-wide profiling of chromatin accessibility and transcription factor (TF) binding revealed that two key regulators of fruit ripening, Musa acuminata NAC-like, Activated by apetala3/Pistillata1 (MaNAP1) and MaMADS1, regulate CWR genes by directly binding to their promoters or by targeting other ripening-related TFs to form a hierarchical regulatory network. Notably, MaNAP1 and MaMADS1 were directly targeted by ETHYLENE INSENSITIVE3 (MaEIN3), and MaNAP1 and MaMADS1 associated with tissue-specific histone modifications, enabling them to integrate MaEIN3-mediated ethylene signaling and undergo epigenetic regulation. Overexpression of MaNAP1, MaMADS1, or other identified regulatory TFs upregulated CWR genes and promoted peel softening. Our findings unveil a MaNAP1-MaMADS1-centered regulatory cascade governing banana peel softening and finger drop, offering potential targets for enhancing banana texture and shelf life.

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