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Author: search.filters.author.Sripumimas, SookmasSubject: search.filters.subject.Enzymatic browning

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    Item type:Publication,
    Pre-peeling salicylic acid and post-slicing melatonin treatment: Effects on browning inhibition and quality improvement in lotus root slices
    (2025-12-01)
    Supapvanich, Suriyan
    ;
    Wongsuwan, Pratumtip
    ;
    Sripumimas, Sookmas
    ;
    Kang, Chuankai
    ;
    Yang, Ting
    Browning is a major problem in lotus root slices. This study examined the combined effects of pre-peeling salicylic acid (SA) and post-slicing melatonin (MT) on browning inhibition and quality retention. Preliminary tests identified optimal conditions as 3 mM SA for 30 min and 0.1 mM MT for 5 min. Intact roots were treated with SA, slices with MT, or both, and stored at 4 °C for 12 days. The combined SA + MT more effectively maintained visual quality by suppressing polyphenol oxidase and peroxidase activities, preserving firmness via reduced polygalacturonase, β-galactosidase, and cellulase activities, and enhancing antioxidant capacity, total phenolics, and flavonoids. It also lowered H<inf>2</inf>O<inf>2</inf> content and lipoxygenase activity, mitigating oxidative stress. Post-slicing MT alone achieved similar browning control but was less effective in texture preservation. These findings indicate that integrated SA and MT application is a promising strategy to extend shelf life and maintain physicochemical quality of fresh-cut lotus root.