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Appl Environ Microbiol. 1971 April; 21(4): 657-661
Copyright © 1971 American Society for Microbiology. All Rights Reserved.

Production of Extracellular Polysaccharide Matrix by Zoogloea ramigera

Department of Microbiology, The Ohio State University, Columbus, Ohio 43210

ABSTRACT

Zoogloea ramigera 115 synthesized large amounts of matrix polymer from fructose, galactose, glucose, lactose, mannose, soluble starch, and sucrose when these carbohydrates were used as supplements to a chemically defined medium. All of them supported polymer synthesis to the extent that cultures thickened to a gel. Concentration of carbohydrate nutrients in the range 0.5 to 2.0% was not a critical factor in determining eventual total thickening to a gel, except in relation to the incubation time required. Glucose disappeared from the growth medium rapidly and correlated with increasing cell growth and poly-ß-hydroxybutyrate (PHB) accumulation. PHB concentration decreased as extracellular polymer was synthesized, suggesting a link between PHB and extracellular polymer production.