Total quality index of Agaricus bisporus mushrooms packed in modified atmosphere

BACKGROUND The aim of this study was to develop a total quality index and examine the effects of modified atmosphere packaging ( MAP ) on the quality of Agaricus bisporus mushrooms stored for 22 days at 4 °C. Mushrooms were packaged under three MAPs : high nitrogen packaging ( HNP ), low carbon dioxide packaging ( LCP ) and low oxygen packaging ( LOP ). Passive MAP with air inside initially was used as the atmosphere treatment ( AIR ). RESULTS This research revealed two phases in quality deterioration of A. bisporus mushrooms. During the first week, most of the quality parameters were not statistically different. Thereafter, odor intensities were stronger for all four types of packaging. Color difference and browning index values showed significantly lower color changes for AIR and LOP compared with HNP and LCP mushrooms. CONCLUSION The best total quality index was calculated for LOP , followed by LCP and AIR . The findings of this study are useful with respect to examining two‐component MAPs , separating the limiting factors ( O 2 and CO 2 ) and evaluating quality deterioration effects and the total quality index of A. bisporus mushrooms.