Transcriptome, Plant Hormone, and Metabolome Analysis Reveals the Mechanism of Purple Pericarp Formation in 'Zihui' Papaya (Carica papaya L.)

文献类型： 外文期刊

第一作者： Wu, Xiaming

作者： Wu, Xiaming;Yang, Min;Liu, Chuanhe;Kuang, Ruibing;He, Han;Zhou, Chenping;Wei, Yuerong

作者机构：

关键词： Carica papaya L.; transcriptome; metabolome; plant hormone; anthocyanin; purple pericarp

期刊名称：MOLECULES （ 影响因子：4.6； 五年影响因子：4.9 ）

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年卷期： 2024 年 29 卷 7 期

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收录情况： SCI

摘要： The color of the pericarp is a crucial characteristic that influences the marketability of papaya fruit. Prior to ripening, normal papaya exhibits a green pericarp, whereas the cultivar 'Zihui' displays purple ring spots on the fruit tip, which significantly affects the fruit's visual appeal. To understand the mechanism behind the formation of purple pericarp, this study performed a thorough examination of the transcriptome, plant hormone, and metabolome. Based on the UPLC-ESI-MS/MS system, a total of 35 anthocyanins and 11 plant hormones were identified, with 27 anthocyanins and two plant hormones exhibiting higher levels of abundance in the purple pericarp. In the purple pericarp, 14 anthocyanin synthesis genes were up-regulated, including CHS, CHI, F3H, F3'5'H, F3'H, ANS, OMT, and CYP73A. Additionally, through co-expression network analysis, three MYBs were identified as potential key regulators of anthocyanin synthesis by controlling genes encoding anthocyanin biosynthesis. As a result, we have identified numerous key genes involved in anthocyanin synthesis and developed new insights into how the purple pericarp of papaya is formed.

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