1-甲基环丙烯结合茉莉酸甲酯雾化熏蒸对石榴采后品质的影响

Effects of 1-methylcyclopropene combined with methyl jasmonate aerosol fumigation on postharvest quality of pomegranate fruit

目的探究1-甲基环丙烯(1-methylcycloproene,1-MCP)和茉莉酸甲酯(methyl jasmonate,MeJA)联合处理对石榴贮藏过程生理代谢和病害的协同调控作用。方法以和田石榴为对象,采用1-MCP结合MeJA雾化熏蒸处理,研究其对冷藏条件下果实品质的影响。结果1-MCP结合MeJA雾化熏蒸处理有效延缓了石榴果实在冷藏过程中的果皮褐变,较好保持了果实色泽,降低了果实腐烂率,保持了果实可溶性固形物、可滴定酸和总酚含量,抑制多酚氧化酶活性,减缓过氧化物酶、过氧化氢酶和超氧化物歧化酶活性的下降,同时保持较低的丙二醛含量和细胞膜透性。此外,结合处理还能维持较高的果实可溶性蛋白含量并保持良好的果皮微观结构。结论1-MCP结合100μmol/L MeJA雾化熏蒸处理的石榴贮藏品质最佳,为石榴采后商品化处理提供了依据。

Objective To explore the cooperative control of 1-methylcycloproene(1-MCP)and methyl jasmonate(MeJA)on postharvest physiology and diseases during of pomegranate fruit.Methods Taking Hetian pomegranate as the object,the effects of 1-MCP combined with MeJA atomization fumigation on fruit quality under cold storage was studied.Results 1-MCP combined with MeJA aerosol fumigation effectively delayed the peel browning,better maintained the fruit color,reduced the decay,maintained the content of soluble solids,titratable acid and total phenols of pomegranate fruit during cold storage.1-MCP combined with MeJA also inhibited polyphenol oxidase activity,and slowed down the decline of peroxidase,catalase and superoxide dismutase activities of pomegranate fruit.It reduced membrane damage by maintaining a low content of malondialdehyde and cell membrane permeability.In addition,the combined treatment could maintain a high soluble protein content in the fruit and maintain a good microstructure of the peel.Conclusion The treatment of 1-MCP combined with 100μmol/L MeJA has the best fresh-keeping effect and it provides a feasible solution for the post harvest commercialization of pomegranate fruit.