Scientia Agricultura Sinica ›› 2012, Vol. 45 ›› Issue (11): 2242-2248.doi: 10.3864/j.issn.0578-1752.2012.11.013

• STORAGE·FRESH-KEEPING·PROCESSING • Previous Articles     Next Articles

Control of Postharvest Diseases and Potentiation of Reactive Oxygen Species Metabolism in Muskmelon (Cucumis melo L.) Fruits Treated by Sodium Silicate

 WANG  Yun-Fei, BI  Yang, REN  Ya-Lin, WANG  Yi, FAN  Cun-Fei, LI  Da-Qiang, YANG  Zhi-Min   

  1. 甘肃农业大学食品科学与工程学院,兰州 730070
  • Received:2011-12-16 Online:2012-06-01 Published:2012-04-06

Abstract: 【Objective】Dipping treatment with sodium silicate on control of postharvest diseases and potentiation of reactive oxygen species metabolism in muskmelon fruits was investigated in this paper. 【Method】Muskmelon (Cucumis melo L. cv. Yujinxiang) fruits were dipped at 100 mmol•L-1 of sodium silicate for 10 min, and inoculated with Trichothecium roseum 12 h after treatment. Effect of sodium silicate treatment on postharvest diseases and reactive oxygen species metabolism in muskmelon fruits was determined. 【Result】Sodium silicate significantly decreased (P<0.05) the lesion diameter of fruits inoculated with T. roseum, and the natural incidence of fruits during storage at room temperature. Sodium silicate induced the accumulation of hydrogen peroxide (H2O2), and promoted the generation rate of superoxide anion ( ). Furthermore, sodium silicate increased the catalase (CAT) activity, but inhibited the superoxide dismutase (SOD) activity in the earlier period. Sodium silicate promoted the accumulaition of malondiadehyde (MDA), however, decreased the cell membrane integrity in muskmelon fruits. Inoculation sodium silicate treated fruits enhanced the generation of H2O2 and   and CAT activity, and maintained SOD activity. Sodium silicon-treatment also induced higher production of MDA. 【Conclusion】Sodium silicate treatment decreased postharvest diseases of muskmelon fruits by regulating reactive oxygen species metabolism.

Key words: Cucumis melo L., sodium silicate, fruit, postharvest diseases, reactive oxygen species

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