Effects of intense pulsed light treatment on postharvest storage physiology and quality of Agaricus bisporus
This study aims at prolonging the postharvest shelf life of fresh Agaricus bisporus fruiting bodies and improving their freshness quality and economic value.The changes in physiological indexes such as appearance quality,moisture content,texture characteristics,microstructure,antioxidant enzyme activity of A.bisporus fruiting bodies were investigated after intense pulsed light treatment at different frequencies(1,2,3 Hz).The effect of intense pulsed light treatment on the storage quality of A.bisporus was also studied.The results showed that intense pulsed light treatment could delay the appearance of brown spots on the surface of A.bisporus fruiting bodies,keep the L* value above 90 and the BI and ∆E* below 12 in 15th day of storage,reduce the moisture loss rate of post-harvest,maintain the hardness of A.bisporus fruiting bodies above 17 N and elasticity above 0.75,protect the integrity of cell membrane,maintain the denseness of tissues,maintain the malondialdehyde(MDA)content below 44 nmol/g,and maintain the relative conductivity below 15%.At the 15th day of storage,in comparison with the CK,the intense pulsed light treatment resulted in 11%-18%decrease in polyphenol oxidase(PPO)activity,18%-29%increase in total sugar content,1%-9%increase in total phenol content,and 21%-67%increase in catalase(CAT),significantly increasing the soluble solids(P<0.05).The results of this study showed that the intense pulsed light technology can effectively improve the storage quality and nutritional value of A.bisporus,prolonging the postharvest shelf life of the edible mushrooms.
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