Abstract
To investigate the effects and potential mechanism of exogenous H2O2 on antioxidant metabolism and yellowing in postharvest broccoli, the transcriptome and metabolome integrated analysis were performed. A total of 61 differentially expressed genes and 6 differentially accumulated metabolites identified among of H2O2 and diphenylene iodonium (DPI) treatments on 2 and 4 d. Exogenous H2O2 promoted the accumulation of endogenous H2O2 within 1 d by activating RBOHs expressions·H2O2 treatment up-regulated the expressions of SOD, CAT and peroxiredoxin (Prx) genes and APX, DHAR and GPX genes involved in ascorbic acid-glutathione (AsA-GSH) cycle, thereby promoting the scavenging of O2-. and H2O2 and alleviating the oxidative damage. Additionally, H2O2 treatment promoted the biosynthesis of AsA and GSH, and increased the content of AsA, GSH, oxidized glutathione, and γ-glutamylcysteine·H2O2 treatment also promoted glucosinolate biosynthesis, the accumulation of 3-(6′-methylthio)hexylmalic acid, and the production of sulforaphane by up-regulating MYS expression, thereby enhancing the health-care function of postharvest broccoli. This study provided the new insights into regulatory mechanism of H2O2 on antioxidant system.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.