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  • Title: Transcriptomic and metabolite analyses provided a new sight of 1-MCP on organic acid metabolism in peach during storage.
    Author: Cai H, Han S, Wang Q, Liu X, Yu Z.
    Journal: J Food Sci; 2023 Aug; 88(8):3323-3331. PubMed ID: 37458299.
    Abstract:
    In this study, "Xiahui 6" peaches were treated with 10 µL/L 1-methylcyclopropene (1-MCP) for 12 h and then stored at 20°C for 9 days; the regulation of 1-MCP on organic acids during storage was investigated through transcriptomic and metabolite analyses. Results showed that 1-MCP maintained higher gene expression of malate synthesis (PpPEPC1, PpPEPC2, and PpNAD-cytMDH) at the end of storage but extremely inhibited the gene expression of malate degradation (PpNADP-cytME) during storage, resulting that malate content in treated peaches was twice that of control group at day 7. Besides, the increasement of citrate synthesis and degradation-related genes (PpmitCS, PpcytACO, PpNAD-mitIDH, and PpNADP-cytIDH) at days 3 and 5 was postponed by 1-MCP treatment, accompanied by 0.5 times higher citrate content at day 7. Our results suggested that 1-MCP has inhibitory effects on both the synthesis and degradation of organic acids; however, the inhibitory effect of 1-MCP on organic acid degradation may be greater than that on organic acid synthesis. Practical Application: This study provides a theoretical basis for the application of 1-methylcyclopropene (1-MCP) in fruit preservation.
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