Hylocereus undatus, is a species of Cactaceae (Fan et al., 2014). Because of its high economic value, it has become a widely concerned fruit of emerging economy in recent years. The pitaya fruit is easy to rot after picking, and the fresh fruit supply period is short, so it is a good research material for fruit preservation (Freitas & Mitcham, 2013). At the later stage of storage, the metabolism of Reactive oxygen species (ROS) in fruit was unbalanced, and the accumulation of ROS in fruit and vegetables caused membrane lipid peroxidation, which led to the decay of fruit (

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The mechanism of honeysuckle quality degeneration in hot air drying was studied by measuring honeysuckle appearance color, relative conductivity, the content of chlorophyll, total phenol and chlorogenic acid. Results showed that enzymatic browning was determined as the major factor in the quality degeneration of hot air dried honeysuckle. Chlorogenic acid as the main substrate of the enzymatic browning decreased obviously in drying. The degradation of chlorophyll was not the main cause of the degeneration of quality and color. The browning level reflected the degree of honeysuckle quality deterioration.