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Objective To investigate the effects of 1-methylcyclopropene (1-MCP) and ZSM-5 nano molecular sieve blended polyethylene (PE) film on the quality and oxidative stress of Prunus persica during cold storage. Methods The 4 kinds of treatments were set up: PE packaging (P), PE packaging combined with 1-MCP (PM), PE film blended with ZSM-5 Nano molecular sieve blended polyethylene film (PN), and the combination of ZSM-5 and 1-MCP (PMN). Samples were stored at 0-2 °C for 35 days with sampling every 7 days. Texture, chromatic indexes, soluble solids content, titratable acidity, electrical conductivity, and the activities or content of polyphenol oxidase (PPO), peroxidase (POD), superoxide dismutase (SOD) and malondialdehyde (MDA) were measured. Results 1-MCP and the nano molecular sieve blended polyethylene film effectively inhibited fruit softening, color change and fibrosis. On day 21, the fruit hardness in the PM and PMN groups was significantly higher than in other groups (P<0.01), while the cohesiveness of the PMN group was significantly lower than the P group on day 27 (P<0.01). Color analysis showed that the redness and yellowness changes in other treated groups were significantly reduced compared to the P group (P<0.05). Although the PMN group's fruit appeared more yellow by day 35, the over-ripening process was suppressed. In terms of physicochemical indicators, the PM and PMN groups exhibited significantly lower electrical conductivity ratio and titratable acidity lose than the P group (P<0.01), indicating that 1-MCP and the nano molecular sieve blended polyethylene film effectively slowed down the increase in cell membrane permeability and the decrease in flavor and nutrients. Physiological measurements showed that by day 35, the MDA level in the PMN group was significantly lower than in the P group (P<0.01), with delayed peak POD and PPO activities. The PMN group's PPO activity was significantly lower than the P group (P<0.01). Conclusion The combination of 1-MCP and ZSM-5 nano molecular sieve blended polyethylene film significantly alleviates color change, over-ripening, and oxidative stress in Prunus persica during cold storage, demonstrating promising application potential.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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