Melatonin enhanced the disease resistance by regulating reactive oxygen species metabolism in postharvest jujube fruit
Lele Zhang
College of Food Science, Shanxi Normal University, Linfen, China
Contribution: Writing - review & editing
Search for more papers by this authorYouwei Yu
College of Food Science, Shanxi Normal University, Linfen, China
Contribution: Investigation, Resources
Search for more papers by this authorLulu Chang
College of Food Science, Shanxi Normal University, Linfen, China
Contribution: Conceptualization, Methodology
Search for more papers by this authorXiaojia Wang
College of Food Science, Shanxi Normal University, Linfen, China
Contribution: Data curation
Search for more papers by this authorCorresponding Author
Shaoying Zhang
College of Food Science, Shanxi Normal University, Linfen, China
Correspondence
Shaoying Zhang, College of Food Science, Shanxi Normal University, Linfen 041001, China.
Email: [email protected]
Contribution: Formal analysis, Funding acquisition
Search for more papers by this authorLele Zhang
College of Food Science, Shanxi Normal University, Linfen, China
Contribution: Writing - review & editing
Search for more papers by this authorYouwei Yu
College of Food Science, Shanxi Normal University, Linfen, China
Contribution: Investigation, Resources
Search for more papers by this authorLulu Chang
College of Food Science, Shanxi Normal University, Linfen, China
Contribution: Conceptualization, Methodology
Search for more papers by this authorXiaojia Wang
College of Food Science, Shanxi Normal University, Linfen, China
Contribution: Data curation
Search for more papers by this authorCorresponding Author
Shaoying Zhang
College of Food Science, Shanxi Normal University, Linfen, China
Correspondence
Shaoying Zhang, College of Food Science, Shanxi Normal University, Linfen 041001, China.
Email: [email protected]
Contribution: Formal analysis, Funding acquisition
Search for more papers by this authorAbstract
Melatonin (MT), as a putative pleiotropic signal molecule, could participate in inducing postharvest disease resistance and inhibiting postharvest pathogen infection in fruit. In this study, we investigate the mechanism of induced resistance by MT treatment against Alternaria rot of jujube. The results showed that 2 and 20 μmol/L MT did not have direct antimicrobial activity, 200 μmol/L MT had little influence on antifungal activity against Alternaria alternata in vitro. MT significantly reduced the lesion area of fruit inoculated with A. alternata. MT decreased the relative electrolytic leakage, malondialdehyde content, hydrogen peroxide, and the rate of superoxide anion production, while enhanced the ascorbic acid and reduced glutathione contents. Furthermore, MT observably increased the defensive enzyme activities of superoxide dismutase, the catalase, ascorbate peroxidase, peroxidase. Accordingly, these results indicated that MT treatment increased the disease resistance of jujube fruit by regulating reactive oxygen species metabolism.
Novelty impact statement
The results showed that MT treatment could inhibit the expansion of lesion diameter, reduce the decay rate of winter jujube, and reduce the accumulation of reactive oxygen species by activating the oxidase system, thus enhancing the resistance of winter Jujube fruit to Alternaria alternata infection by adjusting the ROS mechanism.
CONFLICT OF INTEREST
The authors have declared no conflicts of interest for this article.
Open Research
DATA AVAILABILITY STATEMENT
The raw/processed data required to reproduce these findings cannot be shared at this time as the data also forms part of an ongoing study.
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