Abstract: Pre－ heating and intermittent warming of Pronus persica could lead to the higher SOD activity,lower LOX activity and lower accumulation of MDA.The results indicated that heat treatment could maintain the metabolism balance of active oxygen,and avoid accumulation of harmful substances.Pre－ heating (35± 1℃ ,24h) significantly increased the contents of linoleic acid.After 14 days of harmful storage,the contents of linolenic acid in intermittently warmed peaches (20± 1℃ ,24h) increased significantly.The contents of unsaturated fatty acids in the pre－ heated peaches and the intermittent warmed peaches were higher than those in the control at 0± 1℃ .

Key words: Peach storage Pre－ heating Intermittent warming Chilling injury