薄膜包装结合1-MCP对大同鲜黄花采后生理及品质影响OA北大核心CSTPCD

To determine the suitable storage conditions for fresh daylilies,the purpose of reducing postharvest loss and extending shelf life was achieved.In this study,polyethylene(PE)film packaging with different thicknesses(30 μm,40 μm,50 μm)combined with 1-methylcyclopropene(1-MCP)was used to self-regulate fresh daylily.The changes in quality indexes and microstructure of fresh daylily were analyzed under(0±0.5)℃.Results showed that the combination of film packaging and 1-MCP treatment was an effective way to prolong the freshness life of fresh daylily.Under the condition of(0±0.5)℃,50 μm PE film+1-MCP treatment effectively inhibited the increase of respiration intensity and ethylene release rate of fresh daylily,slowed down the decline of hardness and chlorophyll content,maintained the color of fresh daylily and reduced the weight loss rate and decay rate.After storage for 35 days,the respiratory intensity,ethylene release rate,hardness,and chlorophyll content of 50 μm PE film+1-MCP treatment were 61.25 mg CO2/(kg·h),55.29 μL/(kg·h),42.41 N and 0.014 9 mg/g,the weight loss rate and decay rate decreased by 0.66％and 80.33％respectively compared with CK treatment.It also inhibited the increase of tissue relative conductivity and malondialdehyde(MDA)content,effectively improved the activities of peroxidase(POD)and catalase(CAT),and inhibited the increase of cellulase(Cx)and[3-glucosidase(β-Glu)activities.After storage for 35 days,compared with CK treatment,the tissue relative conductivity and malondialdehyde(MDA)content of samples treated with 50 µm PE film+1-MCP were decreased by 19.18％and 17.51 μg/g,and the POD and CAT activities were as high as 15.05 U/(min·g)and 85.28 U/(min·g),the activities of Cx and[3-Glu were as low as 707.86 μg/(h·g)and 209.41 μg/(h·g).The cell morphology of the fresh daylily was better maintained.Among them,50 µm PE film+1-MCP treatment was the best preservation method for fresh daylily.