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KMID : 0364819800180010020
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Korean Journal of Microbiology
1980 Volume.18 No. 1 p.20 ~ p.28
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A study on methanol-assimilating yeast
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Abstract
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Thirty species of wild yeasts were isolated and identified from two hundred strains collected from flowers by enrichment techniques using steptomycin. Among them, twenty three species could assimilate methanol and three species, Candida incommunis, cryptococcus aerius and Hansenula ciferrii which showed good biomass yield were selected. These three species assimilated methanol as carbon and energy source without mixture of vitamin and yeast extract. The species grown on methanol media were confirmed to have all essential amino acids in their cellular constituents. The content of total amino acids are as followings ; Candida incommunis : 42.5%, Hansenula ciferrii : 39.9%. Of the essential amino acids lysine and threonine which are usually lacking in grain protein were as much as flour´s. The experiments on the growth conditions for the higher biomass yield showed the result that the optimum concentration of methanol and temperature were defined as 1.3% and 30℃ in each species.
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