脉冲强光处理对双孢蘑菇贮藏品质的影响

为探索脉冲强光(IPL)处理对采后食用菌贮藏品质的影响,本试验以新鲜双孢蘑菇为原料,采用不同强度(28.8、48.0、67.2 mJ·cm^-2)的IPL进行前处理,研究其在25℃贮藏期间生理指标及品质的变化。结果表明,随着贮藏时间的延长,IPL处理能有效延缓双孢蘑菇开伞、质量损失、褐变及脂膜氧化,在一定程度上保持原有硬度。同时,IPL处理可显著抑制双孢蘑菇中过氧化物酶(POD)和多酚氧化酶(PPO)活性(P<0.05),可减缓其总酚和维生素C含量的下降(P<0.05),其中48.0 mJ·cm^-2处理组效果最佳;贮藏第8天,总酚和维生素C含量分别较对照提高39.06%、53.63%。本研究结果为IPL技术在控制食用菌品质方面的应用提供了一定的理论依据。

Effects of Intense Pulsed Light Treatment on Storage Quality of Agaricus bisporus

In order to explore the impacts of intense pulsed light (IPL) treatment on the storage quality of post-harvest edible fungi, different intensity (28.8, 48.0 and 67.2 mJ·cm^-2) of IPL treatment on physiology indices and quality of Agaricus bisporus during stored at 25℃ were investigated. The results indicated IPL treatment could efficiently retard the cap opening, weight loss, browning degree and membrane lipid oxidation of the Agaricus bisporus with the prolongation of storage time, and maintain the original firmness to a certain extent. It could also inhibit the peroxidase and polyphenol oxidase activity significantly (P<0.05), and delay the reduction of the total phenol and vitamin C content (P<0.05)at the same time. The Agaricus bisporus treated with 48.0 mJ·cm^-2 was found to have the best effectiveness, which total phenol and vitamin C content 39.06% and 53.63% higher than that of the control group, respectively, after 8 days storage. This research provides references for the application of IPL technology in controlling the quality of edible fungi.