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）水溶液对缫丝花（Rosa sterilis D. shi）果实的影响。实验选取商品成熟度采收的果实，于25℃密闭舱内分别用0.5、1.0、1.5 μL·L⁻¹的1-MCP处理20 h，并设置对照组，以评估1-MCP浓度对果实贮藏期品质的调控效果。结果表明，采后采用1.0 μL·L⁻¹的1-MCP处理，可抑制缫丝花果实的呼吸速率、乙烯生成速率与过氧化物酶（Peroxidase, POD）活性，阻碍还原糖转运与纤维素含量上升，延缓多酚氧化酶（Polyphenol oxidase, PPO）活性升高，并推迟抗坏血酸含量的下降。采后1.0 μL·L⁻¹的1-MCP处理可通过调控纤维化进程，维持缫丝花果实的贮藏品质。