Effect of Modified Atmosphere Packaging with Different Concentrations of Carbon Dioxide on Storage Quality and Physiology of Fresh-Cut Iceberg Lettuce
The effect of modified atmosphere packaging(MAP) with systems consisting of 10% O2 and different concentrations of CO2(10%-50%) on major quality and physiological indices of fresh-cut iceberg lettuce stored at 4 ℃ was investigated.The results showed that high CO2 concentrations could increase the membrane permeability of iceberg lettuce.Significantly,10% O2 +30% CO2 inhibited the activities of PPO,POD and CAT,delayed tissue aging and browning,and maintained the contents of chlorophyll,vitamin C and sugar content well.The sensory evaluation results showed that the fresh-cut iceberg lettuce exposed to 10% O2 +30% CO2 still had commercial value after 15 days of storage.