Integrative analysis of transcriptome reveals the possible mechanism of delayed leaf senescence in pak choi (Brassica rapa subsp. chinensis) following melatonin treatment

文献类型： 外文期刊

第一作者： Liu, Xuesong

作者： Liu, Xuesong;Li, Pengxia;Liu, Xuesong;Li, Pengxia;Li, Yuntong;Li, Pengxia;Zhu, Junzhen;Li, Pengxia;Li, Pengxia

作者机构：

关键词： Pak choi; melatonin; transcriptome; postharvest; senescence

期刊名称：FOOD QUALITY AND SAFETY （ 影响因子：5.6； 五年影响因子：6.2 ）

ISSN： 2399-1399

年卷期： 2023 年 7 卷

页码：

收录情况： SCI

摘要： Melatonin (MT) is a low molecular weight compound with a wide variety of biological functions in plants. It is known to delay senescence in various fruits and vegetables. This study demonstrates that MT (100 mu mol/L) delayed the senescence of pak choi stored at 20 degrees C. A total of 1121 differentially expressed genes (DEGs) were identified in an MT-treated group in comparison to untreated pak choi. Analysis of DEGs revealed that MT-induced delay in senescence involved reduction in the expression of chlorophyll metabolism genes and regulation of the expression of hormone-related genes and leaf senescence-related transcription factors. MT decreased the activity of chlorophyll metabolism-related enzymes Mg-dechelatase, pheophytinase, and pheide a oxygenase, decreased the concentrations of abscisic acid and jasmonic acid, and increased auxin concentration. MT delayed the impact of senescence-related transcription factors BcNAC41 and BcNAC87 on tobacco leaf senescence. This study provides an insight into the molecular mechanisms of MT-induced delay of postharvest senescence in pak choi and confirms its potential as a preservation technique.

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