1-Methylcyclopropene Inhibits Postharvest Browning of Lentinus edodes by Regulating Energy Metabolism

This study investigated the effect of 1-methylcyclopropene (1-MCP) treatment on the browning and energy metabolism of Lentinus edodes, and explored the relationship between energy metabolism and browning in order to provide a theoretical basis for the development of postharvest preservation technologies for Lentinus edodes. The effects of 1-MCP fumigation at three concentrations of 0.25, 0.50 and 0.75 mg/L on the color and respiration and energy metabolism related enzyme activities of postharvest Lentinus edodes were studied. It was shown that 1-MCP could effectively reduce the browning degree of Lentinus edodes cap. After 1-MCP treatment, the respiration of Lentinus edodes was inhibited, and the respiratory intensity decreased. At the same time, 1-MCP treatment could inhibit the increase in polyphenol oxidase (PPO) activity. The energy charge level of 1-MCP-treated Lentinus edodes increased significantly during storage, and the fruiting bodies maintained high succinate dehydrogenase (SDH) activity, cytochrome c oxidase (CCO) activity and adenosine triphosphatase (ATPase) activity. Based on the experimental results, we conclude that 1-MCP can delay the browning of Lentinus edodes cap by regulating the respiration of Lentinus edodes, reducing PPO activity, maintaining the energy level of the fruiting bodies and affecting the enzyme activities related to energy metabolism.