Effect of exogenous methyl jasmonate treatment on disease resistance of postharvest kiwifruit

• Published in: Food chemistry Vol. 305; p. 125483
• Main Authors: Pan, Liuyi, Zhao, Xianyang, Chen, Ming, Fu, Yongqi, Xiang, Miaolian, Chen, Jinyin
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01.02.2020
• Subjects: Acetates - pharmacology; Actinidia - chemistry; Actinidia - metabolism; Actinidia - microbiology; Ascomycota - drug effects; Ascomycota - physiology; Chitinases - genetics; Chitinases - metabolism; Cyclopentanes - pharmacology; Defence enzyme; Disease Resistance - drug effects; Fruit - chemistry; Fruit - metabolism; Fruit - microbiology; Gene expression; Gene Expression - drug effects; Induced resistance; Kiwifruit; Lipid Peroxidation - drug effects; Methyl Jasmonate; Oxylipins - pharmacology; Peroxidase - genetics; Peroxidase - metabolism; Phenols - analysis; Soft rot; Superoxide Dismutase - genetics; Superoxide Dismutase - metabolism; Methyl Jasmonate; Kiwifruit; Defence enzyme; Induced resistance; Gene expression; Soft rot
• ISSN: 0308-8146; 1873-7072
• DOI: 10.1016/j.foodchem.2019.125483

Kiwifruit (Actinidia deliciosa cv. Jinkui) were treated with 0.1 mmol/L methyl jasmonate (MeJA) to investigate the effects on disease resistance to soft rot caused by Botryosphaeria dothidea. The results showed that MeJA treatment significantly reduced the diameter of lesions after inoculation with B. dothidea. This treatment significantly enhanced the activities of related antioxidant protective enzymes, defence-related enzymes including catalase (CAT), peroxidase (POD), superoxide dismutase (SOD), polyphenol oxidase (PPO), chitinase (CHI), β-1,3 glucanase (GLU) and increased the accumulation of total phenolic content, while the degree of membrane lipid peroxidation was reduced. MeJA treatment effectively enhanced gene expression of AcPOD, AcSOD, AcCHI and AcGLU. The results from this research suggest that MeJA treatment is a promising and safe strategy for controlling postharvest rot soft of kiwifruit. •Methyl jasmonate was beneficial in controlling postharvest soft rot of kiwifruit.•Methyl jasmonate induced the activities and gene expression of antioxidant and defence enzymes.•Methyl jasmonate treatment is a viable method for kiwifruit storage.