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(100μmol/L)delayed the senescence of pak choi stored at 20°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.
作者
刘雪松
李韫同
朱俊臻
李鹏霞
Xuesong Liu;Yuntong Li;Junzhen Zhu;Pengxia Li(Institute of Agricultural Facilities and Equipment,Jiangsu Academy of Agricultural Sciences,Nanjing,China;Key Laboratory of Cold Chain Logistics Technology for Agro-Products,Ministry of Agriculture and Rural Affairs,China;Department of Food Science,Shenyang Agricultural University,Shenyang,China;School of Food and Biological Engineering,Jiangsu University,Zhenjiang,China;Jiangsu Key Laboratory for Horticultural Crop Genetic Improvement,Nanjing,China)
基金
the National Natural Science Foundation of China(No.32001451)
the Key and General Programs of Modern Agriculture in Jiangsu Province(No.BE2022368),China.
