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
作者： Liu, Xuesong 1 ; Li, Yuntong 3 ; Zhu, Junzhen 4 ; Li, Pengxia 1 ;
作者机构： 1.Jiangsu Acad Agr Sci, Inst Agr Facil & Equipment, Nanjing 210014, Peoples R China
2.Minist Agr & Rural Affairs, Key Lab Cold Chain Logist Technol Agroprod, Beijing, Peoples R China
3.Shenyang Agr Univ, Dept Food Sci, Shenyang, Peoples R China
4.Jiangsu Univ, Sch Food & Biol Engn, Zhenjiang, Peoples R China
5.Jiangsu Key Lab Hort Crop Genet Improvement, Nanjing, Peoples R China
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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