Multiple 1-MCP treatment more effectively alleviated postharvest nectarine chilling injury than conventional one-time 1-MCP treatment by regulating ROS and energy metabolism.

Abstract

The objective of the present study was to investigate the effectiveness of different 1-MCP treatment patterns on alleviating chilling injury (CI) of postharvest nectarine stored at 0±1°C. Nectarine fruits were subjected to the following treatments: Single-High dose 1-MCP treatment (S-H): 1μL L-1 application before storage; Multi-low dose 1-MCP treatment: (M-L) Five 0.25μL L-1 applications after 0, 5, 10, 15, and 20d of storage; Multi-high dose 1-MCP treatment (M-H): Five 1μL L-1 applications after 0, 5, 10, 15 and 20d of storage. The results showed that although all 1-MCP treatments alleviated CI, M-H 1-MCP treatment is the most effective pattern in alleviating CI of nectarine fruit in S-H, M-L, and M-H 1-MCP treatments. Moreover, this study indicated that the reduction of CI in nectarine by 1-MCP application was related to its regulations of ROS and energy metabolism.