关键词: 包装；透气性；双孢蘑菇；呼吸代谢

Abstract: In this study, commercial films with different permeabilities (polyvinylidene chloride (PVDC), BXD3C, BXD4C and CRM1C) were selected for packaging treatment of postharvest Agaricus bisporus to investigate the changes in the storage quality and respiratory metabolism of Agaricus bisporus at 4 ℃. The results showed that CRM1C had the greatest permeability among the four films, BXD3C and BXD4C were in the middle, and the permeability of PVDC was worst. On the 15th day of storage, compared with BXD3C, BXD4C, and PVDC packaging, CRM1C packaging could effectively inhibit the respiration rate of postharvest Agaricus bisporus, reduce malondialdehyde (MDA) accumulation and intracellular electrolyte leakage, maintain vitamin C content, and inhibit the increase of browning index. Meanwhile, CRM1C packaging could maintain the activities of rate-limiting enzymes in glycolysis (pyruvate kinase (PK) and phosphofructokinase (PFK)), the tricarboxylic acid cycle and the electron transport chain (α-ketoglutarate dehydrogenase (α-KGDH) and succinate dehydrogenase (SDH)) as well as cellular energy charge in Agaricus bisporus, and increase the activity of adenosine triphosphate (ATP) synthase, ensuring energy supply in Agaricus bisporus in the late storage period and delaying postharvest browning. The results of this study can provide a reference for the post-harvest preservation of Agaricus bisporus.

Key words: packaging; permeability; Agaricus bisporus; respiratory metabolism