Acidic electrolyzed water treatment delayed fruit disease development of harvested longans through inducing the disease resistance and maintaining the ROS metabolism systems

• Published in: Postharvest biology and technology Vol. 171; p. 111349
• Main Authors: Tang, Jinyan, Chen, Hongbin, Lin, Hetong, Hung, Yen-Con, Xie, Huilin, Chen, Yihui
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.01.2021; Elsevier BV
• Subjects: Acidic electrolyzed water (AEW); Antioxidants; Disease development; Disease resistance; Enzymes; Fruits; Hydrogen peroxide; Longan fruit; Medical treatment; Metabolism; Reactive oxygen species (ROS); ROS metabolism; Scavenging; Water treatment; Disease development; Disease resistance; Acidic electrolyzed water (AEW); Longan fruit; Reactive oxygen species (ROS); ROS metabolism
• ISSN: 0925-5214; 1873-2356
• DOI: 10.1016/j.postharvbio.2020.111349

•Longan fruit were immersed for 10 min in AEW (pH: 2.5 and ACC: 80 mg/L).•AEW promoted higher activities of disease-resistant enzymes in harvested longans.•AEW increased ROS scavenging capacity in harvested longans.•AEW reduced membrane lipid peroxidation in harvested longans.•AEW treatment reduced disease occurrence in harvested longans. This work was designed to assess the effects of acidic electrolyzed water (AEW) on disease occurrence, disease-resistant enzymes activities, H2O2 content, as well as the ROS scavenging systems in longans during postharvest storage. The harvested ‘Fuyan’ longan fruit were immersed in AEW with ACC of 80 mg/L at pH 2.5 for 10 min, and then stored at 25 °C. Results suggested that AEW treatment suppressed the occurrence of fruit disease, promoted the activities of PAL, CHI, GLU, C4H and 4-CL, and boosted the amount of H2O2. In addition, AEW treatment decreased the production of O2− generation rate and MDA content, increased the activities of antioxidant enzymes (e.g. SOD, CAT and APX), and maintained high levels of non-enzymatic antioxidant systems (e.g. AsA, GSH, DPPH radical scavenging ability and reducing power). These results revealed that AEW may be an effective treatment to enhance the fruit disease resistance and ROS scavenging capacity for suppressing the disease development of postharvest longans.