Postharvest 24-epibrassinolide treatment improves chilling resistance of peach fruit via PpHDT1 modulating brassinosteroid metabolism

文献类型： 外文期刊

第一作者： Hu, Shunqing

作者： Hu, Shunqing;Xie, Bing;Hou, Yuanyuan;Zhao, Liangyi;Zheng, Yonghua;Jin, Peng

作者机构：

关键词： Peach; 24-Epibrassinolide; Chilling injury; PpHDT1; Brassinosteroid metabolism

期刊名称：PLANT PHYSIOLOGY AND BIOCHEMISTRY （ 影响因子：6.5； 五年影响因子：6.4 ）

ISSN： 0981-9428

年卷期： 2023 年 204 卷

页码：

收录情况： SCI

摘要： Brassinosteroids (BRs) exhibit a positive effect on facilitating chilling resistance in fruits and vegetables. However, the change and regulatory mechanism of BR metabolism in fruits and vegetables are poorly understood. This study aimed to explore the underlying relationship among chilling injury (CI), BR metabolism and regulatory factor PpHDT1. The results showed that exogenous 24-epibrassinolide (EBR) retarded peaches CI, reduced endogenous brassinolide (BL) accumulation, repressed the transcriptions of BR synthesis-related genes, promoted expression of BR signal-related genes. The results of molecular assays in vivo demonstrated that PpHDT1 downregulated BR synthesis gene PpDWF4 and up-regulated BR signal transduction gene PpBZR1. Moreover, EBR treatment enhanced PpHDT1 expression, revealing that EBR treatment might alleviate peaches CI through PpHDT1 modulating BL metabolism and signal pathway. Our study provides a new insight into the underlying mechanism of EBR on regulating chilling resistance in postharvest peaches.

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