biostudies-literatureFeng Yzhengyang zhao3775https://www.ebi.ac.uk/biostudies/studies/S-EPMC9229340biostudies-literatureUnknown27(12)The bagging of fruits provides efficient protection from high-intensity sunlight and improves fruit color and quality. However, bagged fruit suddenly exposed to bright light can cause sunburn and destroys the peel cell structure. In this study, fruits from ten-year-old apple trees of 'Gala' variety were debagged, and the effect of sunburn on fruits was divided into: (1) normal peels (BFN), (2) peels with albefaction (BFA), and (3) browning (BFB). The non-bagging fruits (NBF) were set as a control to study the physiological characteristics of apple fruits with different levels of sunburn. Our results showed that in the early stages of debagged fruits' sunburn, the cell structure of the peel was partially destroyed, the color of the injured fruit surface turned white, and the peroxidation inMolecules (Basel, Switzerland)Physiological Characteristics of Sunburn Peel after Apple Debagged.PMC9229340CARS-27Yang JLi SSu QFeng YJia RZhao ZfalsePhysiological Characteristics of Sunburn Peel after Apple Debagged.The bagging of fruits provides efficient protection from high-intensity sunlight and improves fruit color and quality. However, bagged fruit suddenly exposed to bright light can cause sunburn and destroys the peel cell structure. In this study, fruits from ten-year-old apple trees of 'Gala' variety were debagged, and the effect of sunburn on fruits was divided into: (1) normal peels (BFN), (2) peels with albefaction (BFA), and (3) browning (BFB). The non-bagging fruits (NBF) were set as a control to study the physiological characteristics of apple fruits with different levels of sunburn. Our results showed that in the early stages of debagged fruits' sunburn, the cell structure of the peel was partially destroyed, the color of the injured fruit surface turned white, and the peroxidation in2022-01-01T00:00:00Z2022 Jun2025-04-04T19:13:01.553Z2025-04-04T19:13:01.553ZS-EPMC92293403574490010.3390/molecules27123775