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

Food Chem. 2020 Feb 1:305:125483. doi: 10.1016/j.foodchem.2019.125483. Epub 2019 Sep 5.

Abstract

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.

Keywords: Defence enzyme; Gene expression; Induced resistance; Kiwifruit; Methyl Jasmonate; Soft rot.

MeSH terms

  • Acetates / pharmacology*
  • Actinidia / chemistry
  • Actinidia / metabolism
  • Actinidia / microbiology*
  • Ascomycota / drug effects*
  • Ascomycota / physiology
  • Chitinases / genetics
  • Chitinases / metabolism
  • Cyclopentanes / pharmacology*
  • Disease Resistance / drug effects*
  • Fruit / chemistry
  • Fruit / metabolism
  • Fruit / microbiology
  • Gene Expression / drug effects
  • Lipid Peroxidation / drug effects
  • Oxylipins / pharmacology*
  • Peroxidase / genetics
  • Peroxidase / metabolism
  • Phenols / analysis
  • Superoxide Dismutase / genetics
  • Superoxide Dismutase / metabolism

Substances

  • Acetates
  • Cyclopentanes
  • Oxylipins
  • Phenols
  • methyl jasmonate
  • Peroxidase
  • Superoxide Dismutase
  • Chitinases