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FERMENTATIVE PRODUCTION OF EXOCELLULAR GLUCANS BY FLESHY FUNGI.

E N DAVIS, R A RHODES, H R SHULKE

    Applied Microbiology
    |March 1, 1965
    PubMed
    Summary

    Two fungi species, Plectania occidentalis and Helotium sp., efficiently produce beta-1, 3-glucans, valuable biopolymers, through submerged fermentation. These organisms demonstrate high yields and specific substrate consumption for biopolymer synthesis.

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    Area of Science:

    • Biotechnology
    • Mycology
    • Biochemistry

    Background:

    • Beta-1, 3-glucans are significant exocellular polysaccharides with diverse applications.
    • Fungal fermentation is a key method for producing microbial polysaccharides.

    Purpose of the Study:

    • To investigate the production of beta-1, 3-glucans by two higher fungi species.
    • To optimize fermentation conditions for maximizing polymer yield.

    Main Methods:

    • Submerged aerobic cultivation of Plectania occidentalis NRRL 3137 and Helotium sp. NRRL 3129.
    • Fermentation using hydrolyzed soy protein or soy flakes-based media with glucose, xylose, or other sugars.
    • Polymer isolation via alcohol precipitation and purification.

    Main Results:

    Keywords:
    ARABINOSECARBOHYDRATE METABOLISMCULTURE MEDIAEXPERIMENTAL LAB STUDYFERMENTATIONFRUCTOSEFUNGIGALACTOSEGLUCOSEHYDROGEN-ION CONCENTRATIONLACTOSEMALTOSEMANNOSEPOLYSACCHARIDESPRECIPITATIONSUCROSETEMPERATUREXYLOSE

    Related Experiment Videos

    • Plectania occidentalis yielded approximately 30% beta-1, 3-glucans from glucose/xylose.
    • Helotium sp. achieved 40-65% yield of beta-1, 3-glucans from various sugars within 72 hours.
    • Optimal fermentation occurred at slightly acidic pH and around 25°C.

    Conclusions:

    • Both fungal species are effective producers of beta-1, 3-glucans.
    • Fermentation parameters can be optimized for high biopolymer yield.
    • The study highlights potential for industrial production of fungal beta-1, 3-glucans.