Influence of Antimicrobial Coating and Low Temperature Storage on Quality Changes of Queen Pineapple Fruit

The incorporation of low temperature, high relative humidity condition and coating for prolong postharvest storage life for ‘Queen’ pineapple cv. Ninh Binh in Vietnam was studied. Three types of antimicrobial coating solutions were used in this study including chitosan/methylcellulose (C/MC) solution, C/MC solution incorporated with vanillin (C/MC-vanillin) and carbendazim (C/MC-carbendazim). The pineapples, uncoated and coated with different film solutions, were stored at 12 ± 1?C, 85 ± 2% RH for 30 days and were examined for physical properties, physical-chemical properties and sensory values. The coating delayed the changes in total soluble solids, flesh firmness, flesh color and ethanol content. Specifically, pineapples coated with C/MC-carbendazim showed the lowest value on ethanol content and the highest value on TSS, firmness, flesh color and sensory. However, no significant change in weight loss was found for pineapples uncoated and coated with C/MC-carbendazim at low temperature and high relative humidity condition. These results showed that pineapples coated with C/MC-carbendazim and maintained at 12±1?C, 85±2%RH show the best fruit quality.