Caffeic acid-grafted-chitosan/polylactic acid film packaging enhances the postharvest quality of Agaricus bisporus by regulating membrane lipid metabolism

In this study, the film assembled by caffeic acid-grafted-chitosan/polylactic acid (CA-g-CS/PLA) was used for packaging postharvest Agaricus bisporus, and its effects on postharvest quality of Agaricus bisporus by regulating membrane lipid metabolism were investigated. The results showed that compared to traditional polyethylene packaging, the cell morphology of Agaricus bisporus packaged by CA-g-CS/PLA demonstrated a more complete structure due to its lower permeability, higher fluidity and stronger ability to maintain free water. Meanwhile, CA-g-CS/PLA packaging could effectively delay the decrease rate of unsaturation value and phospholipids of Agaricus bisporus during storage. In addition, the activities and expression levels of lipoxygenase (LOX), phospholipase C (PLC) and phospholipase D (PLD) in Agaricus bisporus packaged with CA-g-CS/PLA were inhibited, while those of glycerol-3-phosphate acyltransferase (GPAT) and sphingomyelin synthase (SMS) were promoted. Therefore, CA-g-CS/PLA packaging could enhance the postharvest quality of Agaricus bisporus by regulating membrane lipid metabolism, which has great application potential in the field of new intelligent packaging.

Automated summary

In this study, CA-g-CS/PLA film was used for packaging postharvest Agaricus bisporus to regulate membrane lipid metabolism and improve postharvest quality. Results showed that CA-g-CS/PLA packaging could delay the decrease of membrane lipid content in Agaricus bisporus and inhibit the activity of harmful enzymes. Therefore, CA-g-CS/PLA packaging has great application potential in the field of new intelligent packaging.