Postharvest 1-methylcyclopropene treatments maintain the quality of Rosa sterilis D. shi during storage

Abstract Effects of different concentrations of aqueous 1-methylcyclopropene (1-MCP) on Rosa sterilis D. shi fruits were investigated. The fruits were harvested at commercial maturity stage and treated with 1-MCP treatment at 0.5, 1.0, and 1.5 μL L-1 for 20 h at 25 °C in an air tight chamber along with control sample to evaluate the effect of 1-MCP concentration on its quality during storage. The result showed that postharvest treatment with 1.0 μL L-1 1-MCP suppressed the respiration rate, ethylene production rate and POD activity in Rosa sterilis D. shi fruits, inhibited the transport of reducing sugar and the increase of cellulose, delayed the increase in PPO activity, and retarded the decrease in ascorbic acid. The regulation of fibrosis process with postharvest 1.0 μL L-11-MCP treatment could be used to maintain the quality of Rosa sterilis D. shi fruits.

摘要 本研究探究了不同浓度1-甲基环丙烯（1-methylcyclopropene, 1-MCP）水溶液对Rosa sterilis D. shi果实的调控效应。实验选取处于商品成熟阶段的该果实，于25℃密闭舱中以0.5、1.0、1.5 μL·L⁻¹的1-MCP处理20 h，并设置空白对照组，以评估1-MCP浓度对果实贮藏期品质的影响。结果表明，采后采用1.0 μL·L⁻¹的1-MCP处理，可抑制Rosa sterilis D. shi果实的呼吸速率、乙烯生成速率与过氧化物酶（Peroxidase, POD）活性，抑制还原糖转运与纤维素含量的上升，延缓多酚氧化酶（Polyphenol Oxidase, PPO）活性的升高，并阻滞抗坏血酸含量的下降。采后施加1.0 μL·L⁻¹的1-MCP对果实纤维化进程的调控作用，可用于维持该果实的贮藏品质。