Antioxidant and Fatty Acid Changes in Pomegranate Peel With Induced Chilling Injury and Browning by Ethylene During Long Storage Times

• DOI: 10.3389/fpls.2022.771094
• Publication Date: 2022-03-09T14:50:18Z
• Authors: Mónika Valdenegro; Lida Fuentes; Maricarmen Bernales; Camila Huidobro; Liliam Monsalve; Ignacia Hernández; Maximiliano Schelle; Ricardo Simpson
• Keywords: Aril; Punica; Modified atmosphere; Browning; Climacteric

Pomegranate (Punica granatum) is a non-climacteric fruit with high antioxidant content in arils and peels, of which 92% are anthocyanins tannins. However, it susceptible to chilling injury (CI), physiological disorder concentrated the peel, can affect organoleptic quality fruit. To understand effects modified atmosphere ethylene responses stress on composition fatty acids peel under CI conditions, exogenous treatments (0.5, 1.0, 1.5 μg L-1), 1-methylcyclopropene (1-MCP; 1 μl packaging (MAP: XTend™ bags), combined strategy MAP/1-MCP, package macroperforated bags (MPB-control treatment) were evaluated. The assay was performed cold conditions (2 ± 1°C; 85% RH) stimulate damage sampled for 120 days (+3 at 20°C). During storage, symptoms began 20 MPB 60 all ethylene; delayed up MAP, 1-MCP, MAP/1-MCP treatment. Damage peel. Ethylene MPB-control induced significant electrolyte leakage, lipid peroxidation, oxidative damage. In contrast, MAP alone or combination 1-MCP successfully symptoms. no differences observed between acid content, e.g., oleic acid, linoleic palmitic but loss noted after storage. Cold storage caused an increase anthocyanin concentration arils, increasing 12 times treated final stage (120 + 3 20°C), non-significant tannin long-term pomegranate, delay reduce appearance This long induces important decrease unsaturated/saturated ratio, not reversed by any postharvest A higher ratio showed protective effect tissues. addition, possible cold-storage pomegranates ethylene.