Ethylene induced CpNAC4 participates in ethylene synthesis by regulating CpACS2 and CpACO4 during papaya fruit ripening

文献类型： 外文期刊

第一作者： Fu, Changchun

作者： Fu, Changchun;Yu, Zuolong;Han, Chao;Han, Yanchao

作者机构：

关键词： NAC; Ethylene; Regulate; Fruit ripening

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 206 卷

页码：

收录情况： SCI

摘要： Ethylene plays vital functions in the ripening of papaya, and its biosynthesis mediated by massive TFs which have been researched in various fruits. But the researches on TFs, especially NACs, regulating genes related to ethylene synthesis of papaya is rare. In this study, a new NAC TF, named CpNAC4 belonging to ATAF subfamily, was isolated and identified from papaya. qRT-PCR results showed that CpNAC4, CpACS2 and CpACO4 genes were ripening-and ethylene-induced. Particularly, the promoter activity of CpNAC4 was activated by ethylene, implicating its role in ethylene biosynthesis during fruit ripening. Moreover, CpNAC4 was a transcriptional activator and could bind to and activate CpACS2 and CpACO4 promoters. Taken together, our results revealed that the ethylene-induced CpNAC4 was a transcriptional activator, and might take part in papaya ripening through activation of ethylene biosynthesis related genes to mediate ethylene production, offering new insight of the ethylene biosynthesis regulatory network in fruit ripening.

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