Abstract:This study aimed to explore the effect of calcium chloride（CaCl2）treatment on the cell wall metabolism of Passiflora edulia during room temperature storage.The collected P.edulia samples were soaked in 5% CaCl2 and purified water（control）for 5 min and stored at（22±1）℃for 8 d.The firmness，color，cell wall components，and enzyme activities related to cell wall metabolism were determined regularly，followed by correlation analysis and principal component analysis（PCA）.The results showed that 5% CaCl2 treatment could control the decrease in firmness and color of P.edulia，inhibit the degradation of covalently bound pectin（SCSP）and 24% potassium hydroxide-soluble fraction（24KSF）content，reduce the content of water-soluble pectin（WSP），ionic（EDTA）-soluble pectin（ISP），and 4% potassium hydroxide-soluble fraction（4KSF），and slow down the increase in polygalacturonase（PG）and pectin methylesterase（PME）activities.The correlation analysis showed that fruit firmness was significantly correlated with color，WSP content，ISP content，24KSF content，PG activity，and PME activity（P<0.01）.PCA showed that PC1，PC2，and PC3 could represent 82.266% of the information of 12 indexes and comprehensively reflect the overall information of physiological indexes of P.edulia.The comprehensive score of the CaCl2 treatment group was always higher than that of the control group，which indicated that CaCl2 treatment could slow down the softening speed and prolong the shelf life of P.edulia during storage by regulating the cell wall metabolism.