Effect of yeast extract addition to a mineral salts medium containing hydrolyzed plant xylan on fungal pullulan production

Zeitschrift Für Naturforschung. C, a Journal of Biosciences
Daniel E Kennedy Ii, Thomas P West

Abstract

The ability of the fungus Aureobasidium pullulans ATCC 42023 to produce pullulan from yeast extract-supplemented xylan hydrolysates of the prairie grass prairie cordgrass was examined relative to polysaccharide and cell biomass production, yield, and pullulan content of the polysaccharide. A pullulan concentration of 11.2 g L-1 and yield of 0.79 g g-1 was produced by ATCC 42023 when grown for 168 h at 30°C on the phosphate-buffered hydrolysate supplemented with yeast extract. The highest biomass level being 8.8 g L-1 was produced by ATCC 42023 after 168 h on a yeast extract-supplemented, hydrolysate-containing complete medium lacking sodium chloride. The highest pullulan content of the polysaccharide produced by ATCC 42023 after 168 h on the hydrolysate medium supplemented with yeast extract and ammonium sulfate was 70%. The findings indicate that a polysaccharide with a high pullulan content can be produced at a relatively high yield by the fungus grown on a yeast extract-supplemented xylan hydrolysate, suggesting that pullulan could be produced using a biomass-based process.

References

Jul 1, 1984·Applied and Environmental Microbiology·J M Boa, A Leduy
Jul 13, 2011·Journal of Industrial Microbiology & Biotechnology·Stephen R HughesJeremy E Javers
Apr 27, 2013·Carbohydrate Polymers·Vipul D PrajapatiSimin M Khanda
Sep 5, 2008·Carbohydrate Polymers·Ram S SinghJohn F Kennedy

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Citations

Aug 21, 2020·Zeitschrift Für Naturforschung. C, a Journal of Biosciences·Samatha S R Rudrangi, Thomas P West

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