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  • Title: UV-B irradiation alleviates the deterioration of cold-stored mangoes by enhancing endogenous nitric oxide levels.
    Author: Ruan J, Li M, Jin H, Sun L, Zhu Y, Xu M, Dong J.
    Journal: Food Chem; 2015 Feb 15; 169():417-23. PubMed ID: 25236246.
    Abstract:
    Effects of UV-B radiation on chilling injury, ripening and endogenous nitric oxide (NO) levels in mango fruit were evaluated. Chilling injury index, ion leakage, and malondialdehyde (MDA) content of the fruit pretreated with 5kJm(-2) UV-B for 4h were significantly lower than those of the control during fruit ripening at ambient temperature following cold storage at 6°C for 10days. Fruit firmness of the mangoes irradiated with UV-B was significantly higher than the control during the ripening period. Endogenous NO levels of the UV-B-irradiated fruit were rapidly increased after UV-B treatment. Pre-treatment of mangoes with the NO specific scavenger, not only abolished UV-B-triggered NO accumulation, but also suppressed the UV-B-reduced chilling injury, oxidative damage, and ripening delay of the fruit. Together, the results suggest that UV-B treatment may enhance chilling tolerance and delay fruit ripening of mangoes by triggering endogenous NO generation in the fruit.
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