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Author: search.filters.author.Supapvanich, S.Subject: search.filters.subject.Salicylic acid

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    Effects of hot water incorporated with salicylic acid dips on postharvest quality of 'Holland' papaya fruit during storage
    (2020-04-22)
    Supapvanich, S.
    ;
    Boonyaritthongchai, P.
    ;
    Promyou, S.
    ;
    Wong-Aree, C.
    The aim of this work was to determine the effects of quarantine hot water incorporated with salicylic acid (SA+H) dip on postharvest quality of 'Holland' papaya fruit during cold storage at 8±1°C, followed by 1 day at room temperature (31±2°C). Skin damage, fruit decay, firmness, total soluble solids (TSS)/total acid (TA) content, tissue electrolyte leakage and skin and flesh color were monitored. The fruits dipped with 4 mM SA+H had severe skin damage since after treatment. The hot water (H) dip, 1 and 2 mM SA+H prevented fruit skin damage and decay. Both H and SA+H treatments delayed fruit softening and the increase in TSS/TA ratio when compared to the untreated fruits. The fruit treated with 2 mM SA+H had the highest firmness. The electrolyte leakage of both skin and flesh of the untreated and fruit treated with 4 mM SA+H was higher than other treatments. Two mM SA+H dip effectively delayed the skin greenness reduction and yellowness increase. Both H and SA+H dips did not affect the fruit flesh color. In conclusion, 2 mM SA+H dip is an alternative maintaining postharvest quality of 'Holland' papaya fruit during the storage.
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    Physicochemical changes in ‘Holland’ papaya fruit treated with quarantine hot water incorporated with salicylic acid dip during cold storage
    (2019-01-01)
    Supapvanich, S.
    ;
    Boonyaritthongchai, P.
    ;
    Wongs-Aree, C.
    The aim of this study was to determine the effects of quarantine hot water dip at 42°C for 40 min followed with 49°C for 20 min (H) incorporated with 2.0 mM salicylic acid (SA) on physicochemical changes in ‘Holland’ papaya fruit during storage. Firmness, total soluble solids content, electrolyte leakage (EL), malondialdehyde (MDA) content, pectin substances, antioxidant capacity, ascorbic acid and total phenols content of the fruit held at 8±1°C for 21 days followed by 1 day at room temperature (31±2°C) were monitored. The firmness of the fruit dipped in hot water incorporated with 2.0 mM SA (2.0 mM SA+H) dip was higher than that of the fruit dipped in H, 2.0 mM SA and control. All treatments had no effect on TSS content. 2.0 mM SA+H dip retarded the increase in EL, MDA and EDTA-soluble pectin content and decrease in Na2CO3-soluble pectin content better than other treatments. Moreover, bioactive compounds content such as antioxidant capacity, ascorbic acid and total phenols content were maintained by 2 mM SA+H dip. These suggest that the use of 2.0 mM SA+H is an effective alternative maintaining postharvest quality of papaya fruit during cold storage.
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    Effects of preharvest salicylic acid or oxalic acid on quality of ‘Queen’ pineapple fruit harvested at different month stored at room temperature
    (2019-01-01)
    Youryon, P.
    ;
    Chimphakdee, N.
    ;
    Supapvanich, S.
    The aim of this work was to investigate the effects of preharvest salicylic acid (SA) or oxalic acid (OX) on quality and internal browning of ‘Queen’ pineapple fruits harvested at different month in year 2015. Visual appearance of half-cut fruit, internal browning (IB) severity score, percentage of fruit number having IB, total soluble solids (TSS), total acidity (TA), ascorbic acid (AsA) contents were determined. The fruits harvested in March had no IB during storage at 25±1°C for 14 days in all treatments. The highest IB severity and the percentage of fruit having IB were found in the fruits harvested in June, especially in control in which IB severity score was 5 and percentage of fruit number having IB was 50%. Preharvest 5 mM SA application could alleviate IB in the fruits during storage and had more effect in reducing IB symptom than 5 mM OX application. Both SA and OX application had no significant effect on the changes in TSS, TA and AsA content of the pineapple fruits. In conclusion, the severity of IB in ‘Queen’ pineapple fruit after harvest depended on the harvesting period and preharvest 5 mM SA application might be an effective alternative alleviating IB during storage.