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Actinomycetales from corn

A J Lyons, T G Pridham, R F Rogers

    Applied Microbiology
    |February 1, 1975
    PubMed
    Summary
    This summary is machine-generated.

    Mesophilic Actinomycetales, primarily Streptomyces species, were identified in corn and corn products. Different treatments of high-moisture corn influenced the types of Streptomyces isolated, with ammonium isobutyrate yielding varied results.

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    Area of Science:

    • Microbiology
    • Food Science
    • Agricultural Science

    Background:

    • Actinomycetales are microorganisms found in various environments, including agricultural products.
    • Corn and its processed forms can harbor diverse microbial communities.

    Purpose of the Study:

    • To isolate and identify mesophilic Actinomycetales from corn and corn products.
    • To investigate the impact of different storage and treatment methods on microbial populations in high-moisture corn.

    Main Methods:

    • Isolation of Actinomycetales from whole corn, brewers grits, and break flour.
    • Characterization and identification of isolated strains using standard microbiological techniques and established taxonomic systems (Pridham et al. and Hütter).
    • Analysis of microbial communities in high-moisture corn under various conditions (untreated, ammonia, ammonium isobutyrate, propionic-acetic acid treatments).

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    Main Results:

    • A total of 139 strains were extensively characterized, and 207 were partially characterized.
    • Streptomyces griseus was predominantly isolated from treated and untreated high-moisture corn, except when treated with ammonium isobutyrate.
    • Ammonium isobutyrate treatment resulted in the isolation of both Streptomyces griseus and Streptomyces albus.
    • Most Actinomycetales isolated from mill products were identified as various Streptomyces species, with only three non-streptomycete strains identified.

    Conclusions:

    • The microbial composition of corn and its products is influenced by processing and storage conditions.
    • Specific treatments, such as ammonium isobutyrate, can alter the dominant Streptomyces species found in high-moisture corn.
    • Streptomyces species are the primary mesophilic Actinomycetales found in the analyzed corn samples.