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The regulatory module involved in ABA-induced ethylene production and fruit ripening in banana and its implications

文献类型： 外文期刊

作者： Zeng, Liming 1 ; Xie, Zhengnan 3 ; Ding, Zehong 3 ; Yan, Yan 3 ; Yang, Jinghao 3 ; Tie, Weiwei 3 ; He, Guangyuan 1 ; Yang, Guangxiao 1 ; Zeng, Jian 2 ; Li, Yin 1 ; Li, Meiying 3 ; Hu, Wei 3 ;

作者机构： 1.Huazhong Univ Sci & Technol, Coll Life Sci & Technol, Key Lab Mol Biophys, Chinese Minist Educ,Chinese Minist Sci & Technol,G, Wuhan 430074, Peoples R China

2.Shaoguan Univ, Sch Biol & Agr, Guangdong Prov Key Lab Utilizat & Conservat Food &, Shaoguan 512000, Peoples R China

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

4.Chinese Acad Trop Agr Sci, Key Lab Biol & Genet Resources Trop Crops, Haikou 571101, Peoples R China

5.Chinese Acad Trop Agr Sci, Hainan Inst Trop Agr Resources, Hainan Key Lab Protect & Utilizat Trop Bioresource, Haikou 571101, Peoples R China

关键词： Abscisic acid; Postharvest ripening; Ethylene synthesis; Banana

期刊名称：POSTHARVEST BIOLOGY AND TECHNOLOGY （ 影响因子：6.8； 五年影响因子：7.5 ）

ISSN： 0925-5214

年卷期： 2025 年 226 卷

页码：

收录情况： SCI

摘要： The plant hormone abscisic acid (ABA) affects ethylene biosynthesis and postharvest shelf life of fruits. However, the family members encoding the ABA core signaling components that are responsible for ABA-induced ethylene biosynthesis and fruit ripening remain unidentified, with the underlying mechanism elusive. Here, we confirm that exogenous ABA treatment induces ethylene biosynthesis and accelerates postharvest banana ripening. Combining transcriptomic analysis and the information of gene families encoding ABA signaling components and downstream transcription factors, we highlight MaPYL3-MaPP2C17-MaSnRK2.3 as one of the major signaling modules responsible for ABA-induced ethylene production. Downstream of the ABA signaling, the transcription factor MabZIP95 is controlled by ABA treatment and directly binds to the promoters of MbACS7, MbACO2, and MbACO3, key for ethylene biosynthesis during banana fruit ripening. The expression of this ABA regulatory module was significantly elevated at 5 days postharvest after ABA treatment, well associated with the earlier and stronger ethylene production. Besides, the comparison of the ABA-related fruit ripening process has been discussed between horticultural crops, suggesting our strategy as effective in the gene discovery towards ABAregulated fruit development. Finally, our work reveals the MaPYL3-MaPP2C17-MaSnRK2.3-MabZIP95MbACS7/MbACO3/MbACO2 regulatory module and indicates its functional involvement in ABA-induced ethylene synthesis and postharvest ripening in banana, providing valuable target genes for the molecular breeding to extend the shelf-life of banana.

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