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    Exogenous application of putrescine affects mango fruit quality and shelf life

    Access Status
    Fulltext not available
    Authors
    Malik, A.
    Singh, Zora
    Dhaliwal, Satvinder
    Date
    2003
    Type
    Conference Paper
    
    Metadata
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    Citation
    Malik, A.U. and Singh, Z and Dhaliwal, S.S. 2003. Exogenous application of putrescine affects mango fruit quality and shelf life, XXVI International Horticultural Congress: Issues and Advances in Postharvest Horticulture, pp. 121-127. Toronto, Canada: International Society for Horticultural Science.
    Source Title
    ISHS Acta Horticulturae 628
    Source Conference
    XXVI International Horticultural Congress: Issues and Advances in Postharvest Horticulture
    Additional URLs
    http://www.actahort.org/books/628/628_13.htm
    Faculty
    Department of Agribusiness
    Division of Resources and Environment
    Muresk Institute
    Remarks

    ISHS Acta Horticulturae 628: XXVI International Horticultural Congress: Issues and Advances in Postharvest Horticulture

    EXOGENOUS APPLICATION OF PUTRESCINE AFFECTS MANGO FRUIT QUALITY AND SHELF LIFE

    Authors: A.U.Malik, Z.Singh, S.S.Dhaliwal

    Copyright International Society for Horticultural Science

    URI
    http://hdl.handle.net/20.500.11937/3451
    Collection
    • Curtin Research Publications
    Abstract

    Short shelf life of mango fruit limits its export to distant markets. The effects of pre and postharvest applications of putrescine on fruit ripening, quality and shelf life of 'Kensington Pride' mango were investigated. An aqueous solution of different concentrations of putrescine (0, 0.5, 1.0, or 2.0 mmol.L-1) containing the surfactant 'Tween-20' (0.01%) were applied as preharvest spray onto trees 7 days prior to harvest and postharvest fruit dip treatments for 6 minutes. One lot of the treated and control fruit was allowed to ripen at room temperature (21 plus / minus 1 deg C) while the second batch was stored at 13 deg C (85% RH) for 20 days. Fruit ripening at ambient temperature revealed that putrescine treatments significantly reduced ethylene production and response was more pronounced in the postharvest dip application than the preharvest spray. Ethylene production decreased as the concentration of applied putrescine increased. Pre and postharvest application of putrescine increased fruit firmness and decreased sugars, compared with control. Both pre and postharvest application also retarded fruit colour development. After 20 days storage, preharvest-treated fruit exhibited higher firmness, TSS and lower fruit rot whilst acidity, total and non-reducing sugars were reduced in fruit treated with both methods, compared with control. In conclusion, preharvest putrescine spray was more effective than postharvest dip. Putrescine treatment (1 mmol.L-1) was effective in delaying fruit ripening at ambient temperatures, whilst 2 mmol.L-1 extended the shelf life and improved fruit quality of 'Kensington Pride' mango.

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