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Transcriptional regulation of MbACO2-mediated ethylene synthesis during postharvest banana ripening

文献类型： 外文期刊

作者： Tang, Yuqi 1 ; Yan, Yan 1 ; Tie, Weiwei 1 ; Ye, Xiaoxue 1 ; Zeng, Liwang 5 ; Zeng, Liming 1 ; Yang, Jinghao 1 ; Xu, Biyu 1 ; Li, Meiying 1 ; Wang, Yu 1 ; Xie, Zhengnan 1 ; Jin, Zhiqiang 1 ; Hu, Wei 1 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, Hainan Key Lab Biosafety Monitoring & Mol Breeding, Key Lab Biol & Genet Resources Trop Crops, Haikou 571101, Peoples R China

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

3.Chinese Acad Trop Agr Sci, Sanya Res Inst, Sanya 572024, Peoples R China

4.Hainan Yazhou Bay Seed Lab, Sanya 572024, Peoples R China

5.Chinese Acad Trop Agr Sci, Inst Sci & Tech Informat, Haikou 571101, Peoples R China

关键词： 1-Aminocyclopropane-1-carboxylic acid; oxidase; Banana; Ethylene; Fruit ripening; Transcriptional regulation

期刊名称：POSTHARVEST BIOLOGY AND TECHNOLOGY （ 影响因子：7.0； 五年影响因子：6.9 ）

ISSN： 0925-5214

年卷期： 2023 年 200 卷

页码：

收录情况： SCI

摘要： Ethylene plays a central role in climacteric fruit ripening. 1-Aminocyclopropane-1-carboxylic acid oxidase (ACO) is a crucial enzyme for ethylene biosynthesis. Edible cultivated banana varieties are mainly composed of the A-or A/B-genome. Nevertheless, the function and regulatory mechanism of ACO genes in the B-genome of banana fruit are unknown. The present study revealed the function and regulatory mechanism of the B-genome-specific gene MbACO2 in ethylene biosynthesis during postharvest banana ripening. MbACO2 expression significantly increased at 6 d postharvest. MbACO2 overexpression in tomato resulted in an increase in ethylene biosynthesis and the acceleration of fruit ripening. MaNAC29 and MbERF71/MbERF113 showed induction during the post-harvest periods and directly activated the transcription of MbACO2 through the CGTC-element and GCC-box in its promoter, respectively. In addition, MaMAPK1 interacted with MaNAC29 to further enhance the transcription of MbACO2. Collectively, our findings demonstrate a novel regulatory cascade involving MaMAPK1, MaNAC29, and MbERF71/MbERF113 that promotes MbACO2 transcription during postharvest banana ripening, which helps design breeding strategies to extend the shelf life of fruit.

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