College of Life Science, Anhui Normal University, Wuhu 241000, China; Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University (BTBU), Beijing 100048, China.
Department of Biological and Agricultural Engineering, University of California, Davis One Shields Avenue, Davis, CA 95616, USA.
Food Chem. 2022 Apr 16;374:131715. doi: 10.1016/j.foodchem.2021.131715. Epub 2021 Dec 1.
The mechanisms of effect of nano-silica coating and pressurized Ar on regulating reactive oxygen species (ROS) generation and scavenging in the senescence of sweet cherries remains unclear. The amounts of reactive oxygen species, hydrogen peroxide, non-enzymatic antioxidants and antioxidases, and cell membrane lipid peroxidation in sweet cherries were determined. Nano-silica coating, pressurized Ar, and the combination of these two treatments, all significantly delayed senescence by suppressing decay rate, and maintained good sensory quality. In additional, all treatments inhibited the generation and accumulation of superoxide anion and hydrogen peroxide, and mitigated the lipid peroxidation of cell membranes of sweet cherries. The combination of these two treatments maintained higher contents of ascorbic acid and glutathione, and enhanced the activities of antioxidases in sweet cherries. It is suggested that nano-silica coating and pressure Ar mediated the ROS metabolism, which might have a role in retaining the quality sweet cherries during cold storage.
纳米二氧化硅涂层和加压 Ar 对调控甜樱桃衰老过程中活性氧（ROS）产生和清除的作用机制尚不清楚。本研究测定了甜樱桃中活性氧、过氧化氢、非酶抗氧化剂和抗氧化酶的含量以及细胞膜脂质过氧化作用。纳米二氧化硅涂层、加压 Ar 以及两者的结合处理均显著抑制了腐烂率，从而延缓了衰老，保持了良好的感官品质。此外，所有处理均抑制了超氧阴离子和过氧化氢的产生和积累，减轻了甜樱桃细胞膜的脂质过氧化作用。两者的结合处理保持了较高的抗坏血酸和谷胱甘肽含量，增强了甜樱桃中抗氧化酶的活性。因此，纳米二氧化硅涂层和压力 Ar 介导了 ROS 代谢，这可能在冷藏过程中对保持甜樱桃的品质起到了一定的作用。
