Cold plasma technology offers new
opportunities to the decontamination
and preservation of fruits and vegetables. In the present research,
strawberries were cut into four wedges and then treated with dielectric
barrier discharge plasma at 45 kV for 1 min and stored for 1 week
(4 °C). Metabolomic analysis suggested that plasma treatment
improved the biosynthesis of the metabolites in the “flavones
and flavonol biosynthesis” pathway and “biosynthesis
of phenylpropanoids” pathway in fresh-cut strawberries. Physiological
assay demonstrated that plasma treatment maintained the texture properties
and inhibited microbial growth of fresh-cut strawberries. In addition,
plasma treatment also promoted the accumulation of total phenolics,
total flavonoid, and anthocyanin by enhancing the critical enzyme
activities and activating related gene expression in phenylpropanoid
as well as reactive oxygen species metabolism, which contributed greatly
to the enhancement of antioxidant capacity of strawberry wedges. Our
investigation provided a new perspective of the effect of plasma treatment
on the safety and quality of strawberry wedges and suggested that
cold plasma treatment holds promise as an emerging processing technology
for improving the quality and antioxidant activity of postharvest
fruits and vegetables.
The effects of l-arginine (Arg, 1 mM) and/or methyl salicylate (MeSA, 0.05 mM) treatment on gray mold caused by Botrytis cinerea in tomato fruit were studied. Results indicated that Arg or MeSA alleviated the incidence and severity of fruit disease caused by B. cinerea, and that both Arg and MeSA (Arg + MeSA) further inhibited the development of fruit decay. Treatment with Arg + MeSA not only enhanced the activities of superoxide dismutase, catalase, and peroxidase but also promoted the expression levels of pathogenesis-related protein 1 gene and the activities of defense-related enzymes of phenylalanine ammonia-lyase, polyphenol oxidase, β-1,3-glucanase, and chitinase during most of the storage periods, which were associated with lower disease incidence and disease index. In addition, the combined treatment elevated the levels of total phenolics, polyamines, especially putrescine, and nitric oxide. These observations suggest that treatment of fruit with Arg + MeSA is an effective and promising way to alleviate postharvest decays on a commercial scale.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.