Phomopsis longanae Chi causing the pulp breakdown of fresh longan fruit through affecting reactive oxygen species metabolism

• Main Authors: Chen, Y. (Author), Fan, Z. (Author), Lin, H. (Author), Lin, M. (Author), Lin, Y. (Author), Yu, J. (Author), Zheng, Y. (Author)
• Format: Article
• Language: English
• Published: Elsevier Ltd 2022
• Subjects: Cytology; Fruit spoilage; Fruits; Longan; Longan fruit; Metabolism; Oxygen; Phomopsi longanae chi; Phomopsis; Phomopsis longanae Chi; Pulp breakdown; Reactive oxygen species; ROS metabolism; ROS scavenging enzyme; Scavenging enzymes; Spoilage
• Online Access: View Fulltext in Publisher

 Phomopsis longanae Chi is a crucial pathogen causing fruit spoilage in postharvest fresh longan. The influence of P. longanae invasion with a suspension containing 1 × 104 P. longanae spores per mL on the breakdown occurrence and ROS metabolism in pulp of longan cv. Fuyan during storage at 28 °C was explicated. Compared to control group, more severe development of pulp breakdown (PB), higher PB index, O2–. generation rate, H2O2 and MDA content, but lower SOD, APX and CAT activities, GSH, AsA, flavonoid and total phenolics amounts, ability of scavenging DPPH radical, and reducing power were displayed in the pulp of P. longanae-infected fruit during days 0–5. In this context, P. longanae induced breakdown of longan pulp by reducing the scavenging ability of ROS and increasing the cumulation of ROS, thereby enhancing the structural collapse and lipid peroxidation of cell membrane, which were responsible for the PB of harvested longans. © 2022 The Authors