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Effect of controlled atmosphere on growth of mold on synthetic media and fruit

W C Yackel, A I Nelson, L S Wei

    Applied Microbiology
    |October 1, 1971
    PubMed

    Insights

    Controlled atmosphere (CA) storage generally inhibits mold growth, extending the shelf life of fruits like cherries and strawberries. However, CA is less effective on already infected produce.

    Area of Science:

    • Food Science
    • Microbiology
    • Horticulture

    Background:

    • Mold spoilage significantly impacts the shelf life and safety of perishable produce.
    • Controlled atmosphere (CA) storage is a method used to extend the post-harvest life of fruits and vegetables.

    Purpose of the Study:

    • To investigate the effect of controlled atmosphere (CA) on the growth of seven common spoilage molds at various temperatures.
    • To compare mold growth and sporulation in CA versus air storage conditions.

    Main Methods:

    • Seven species of spoilage molds were cultured on agar plates at different temperatures.
    • Incubation was performed under both controlled atmosphere (CA) and ambient air conditions.
    • Growth parameters including lag phase, mycelial mass, and spore development were measured.

    Main Results:

    • CA generally increased the lag phase of mold growth, especially near the minimum growth temperature.
    • Mycelial mass and spore development were significantly reduced under CA compared to air storage.
    • CA storage at 34°F (1°C) inhibited mold growth on cherries and strawberries, extending storage life.
    • CA was less effective in preventing further mold growth on already infected produce.

    Conclusions:

    • Controlled atmosphere storage effectively inhibits mold growth and extends the shelf life of certain fruits at specific temperatures.
    • The efficacy of CA is dependent on temperature and the initial condition of the produce (i.e., presence of prior infection).
    • Further research into optimal CA conditions for various produce types and spoilage organisms is warranted.

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