Ying LIU, Xiao-long DU, Xiao-yu LI, Jian-long LI
The synthetic effects of Cryptococcus laurentii and chitosan on postharvest decay and the quality of peach fruit stored at 28°C were evaluated in this study. The results showed that the combined treatment with C. laurentii and 1% chitosan was the most effective way to control gray mold in peach fruit, which remarkably reduced the disease incidence and lesion diameter. Addition of chitosan increased the growth of C. laurentii, the population of which increased faster in the first 24 hours and reached a higher cell concentration than C. laurentii alone after 72 h. The combined treatment with C. laurentii and chitosan was the best to storage effect. Spray experiment showed that chitosan and C. laurentii effectively reduced the weight loss; maintain the firmness and the contents of total soluble solids of peaches during the storage. Moreover, the activities of polyphenol oxidase and peroxidase were markedly enhanced by the combination of C. laurentii and chitosan, which may explain its bacteriostasis mechanism.
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