Inhibitive effects of phytic acid combined with glutathione on the browning and oxidation of King Oyster mushroom (Pleurotus eryngii) slices during drying and storage.

Abstract

Phytic acid and glutathione can inhibit polyphenoloxidase (PPO) activity and suppress browning. This study investigated the effects of phytic acid alone (Treatment-1) or combined with glutathione (Treatment-2) on inhibiting browning and oxidation resistance of King Oyster mushroom (Pleurotus eryngii) slices during drying and storage. In King Oyster mushroom slices, 0.08% phytic acid combined with 0.1% glutathione inhibited the PPO activity by 97.6%, suppressed browning by 78.09% after 6h of drying at 60°C and inhibited browning by 69.93% and oxidation by 78.75% after 12months of storage at∼20°C. Results indicated that using phytic acid combined with glutathione may inhibit browning and suppress the oxidation of King Oyster mushroom slices during drying and storage.