Two R2R3-MYB genes cooperatively control trichome development and cuticular wax biosynthesis in Prunus persica

文献类型： 外文期刊

第一作者： Yang, Qiurui

作者： Yang, Qiurui;Yang, Xianpeng;Wang, Lu;Zheng, Beibei;Cai, Yaming;Ogutu, Collins Otieno;Zhao, Lei;Peng, Qian;Liao, Liao;Zhao, Yun;Zhou, Hui;Han, Yuepeng;Yang, Qiurui;Wang, Lu;Zheng, Beibei;Liao, Liao;Zhao, Yun;Han, Yuepeng;Yang, Qiurui;Cai, Yaming;Zhao, Lei;Peng, Qian;Ogutu, Collins Otieno;Han, Yuepeng;Zhou, Hui

作者机构：

关键词： cuticular wax; PpMYB25; PpMYB26; Prunus persica; trichome

期刊名称：NEW PHYTOLOGIST （ 影响因子：10.323； 五年影响因子：10.768 ）

ISSN： 0028-646X

年卷期： 2022 年 234 卷 1 期

页码：

收录情况： SCI

摘要： The fruit surface has an enormous impact on the external appearance and postharvest shelf-life of fruit. Here, we report two functionally redundant genes, PpMYB25 and PpMYB26, involved in regulation of fruit skin texture in peach. PpMYB25 can activate transcription of PpMYB26 and they both induce trichome development and cuticular wax accumulation, resulting in peach fruit with a fuzzy and dull appearance. By contrast, nonfunctional mutation of PpMYB25 caused by an insertional retrotransposon in the last exon in nectarine fails to activate transcription of PpMYB26, resulting in nectarine fruit with a smooth and shiny appearance due to loss of trichome initiation and decreased cuticular wax accumulation. Secondary cell wall biosynthesis in peach fruit pubescence is controlled by a transcriptional regulatory network, including the master regulator PpNAC43 and its downstream MYB transcription factors such as PpMYB42, PpMYB46 and PpMYB83. Our results show that PpMYB25 and PpMYB26 coordinately regulate fruit pubescence and cuticular wax accumulation and their simultaneous perturbation results in the origin of nectarine, which is botanically classified as a subspecies of peach.

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