Effects of sulfur dioxide fumigation on postharvest quality and reactive oxygen species metabolism in ‘Crimson’ grapes

  • MA Lichun ,
  • ZHANG Qiaocai ,
  • FENG Yudie ,
  • LIU Yongli ,
  • SUN Zhenkai ,
  • ZHANG Minhao ,
  • WU Bin ,
  • ZHANG Zheng
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  • 1(College of Food Science and Pharmacy, Xinjiang Agricultural University, Urumqi 830052, China)
    2(Institute of Food Science and Technology, Xinjiang Academy of Agricultural Sciences, Xinjiang Key Laboratory of Agricultural Products Processing and Preservation, Urumqi 830091, China)
    3(College of Food and Biological Engineering, Zhejiang Gongshang University, Hangzhou 310018, China)
    4(College of Smart Agriculture, Xinjiang University, Urumqi 830017, China)

Received date: 2025-10-16

  Revised date: 2025-12-17

  Online published: 2026-07-31

Abstract

In this study, ‘Crimson’ grapes were fumigated with 500 μL/L SO2 to investigate the effect of SO2 on the postharvest quality of table grapes.The quality and reactive oxygen species metabolism of the fruit were analyzed during storage at room temperature.The results showed that SO2 effectively delayed the decline of fruit firmness, total soluble solids, and titratable acidity, while reducing increases in shattering rate, weight loss, and decay incidence.At the end of storage, the firmness, total soluble solids, and titratable acidity in SO2-treated grapes were 18.22%, 7.12% and 9.20%, higher than in the control, respectively.Meanwhile, the fruit shedding rate, weight loss, and decay incidence in SO2-treated grapes were 62.39%, 35.79% and 84.23%, lower than in the control, respectively.SO2inhibited the accumulation of superoxide anion, hydrogen peroxide, and malondialdehyde.Mechanistically, SO2 down-regulated VvNOX expression, reduced NADPH oxidase activity, and up-regulated the expression and activity of antioxidant enzymes.Simultaneously, SO2 treatment promoted the accumulation of ascorbic acid and reduced glutathione, while inhibiting the formation of dehydroascorbic acid and oxidized glutathione, thereby maintaining ascorbic acid/dehydroascorbic acid and reduced glutathione/oxidized glutathione ratios.Correlation analysis revealed that superoxide anion, hydrogen peroxide, and malondialdehyde contents were negatively associated with firmness, total soluble solids, and titratable acidity, and positively correlated with weight loss, shattering rate, and decay incidence.Overall, SO2 delayed reactive oxygen species accumulation and fruit senescence by modulating the NADPH oxidase/superoxide dismutase system and the ascorbate-glutathione cycle, thereby effectively preserving postharvest grape quality and extending shelf life.

Cite this article

MA Lichun , ZHANG Qiaocai , FENG Yudie , LIU Yongli , SUN Zhenkai , ZHANG Minhao , WU Bin , ZHANG Zheng . Effects of sulfur dioxide fumigation on postharvest quality and reactive oxygen species metabolism in ‘Crimson’ grapes[J]. Food and Fermentation Industries, 2026 , 52(13) : 373 -383 . DOI: 10.13995/j.cnki.11-1802/ts.044846

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