Monitoring of Growth and Production Characteristics of Red Yeasts Cultivated on Hydrothermally Pretreated Lignocellulosic Pine Material

The aim of this work was to compare the production of carotenes and ergosterol by red yeasts grown on pine lignocellulose substrates. The yeast strains Rhodotorula aurantiaca and Sporobolomyces shibatanus were grown on the liquid fraction of steam pretreated pine (210 [degrees]C, catalyst S[O.sub.2]...

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Bibliographic Details
Published in:Chemical and Biochemical Engineering Quarterly 2018-01, Vol.31 (4), p.527-535
Main Author: Haronikova, A.
Format: Article
Language:English
Subjects:
Acetic acid
Bioprocess Technology
Bioprocessteknik
Carotenoids
Engineering and Technology
Ergosterol
Glucose
Industrial Biotechnology
Industriell bioteknik
Lignocellulose
Microorganisms
Organic acids
Phytosterols
Plant lipids
Red yeasts
Steam pretreatment
Steroids (Organic compounds)
Teknik
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Summary:The aim of this work was to compare the production of carotenes and ergosterol by red yeasts grown on pine lignocellulose substrates. The yeast strains Rhodotorula aurantiaca and Sporobolomyces shibatanus were grown on the liquid fraction of steam pretreated pine (210 [degrees]C, catalyst S[O.sub.2]). Biomass production on a pine hydrolysate was lower than on glucose. The highest content of carotenoids and ergosterol in the cells of R. aurantiaca grown on pine hydrolysate was about 1.7 mg [g.sup.-1] and 0.8 mg [g.sup.-1] (dwt), respectively, and in S. shibatanus about 0.9 mg [g.sup.-1] and 0.1 mg [g.sup.-1], respectively.Hemicellulose hydrolysates may contain many compounds that have inhibitory effects on microorganisms. In this work, the influences of some inhibitors were assessed by cultivating yeasts on media with a representative addition of the selected compounds. From these tests, furfural appears to be the most critical inhibitor, whereas acetic acid and 5-hydroxymethyl furfural (HMF) do not affect the growth so much.Key words:lignocellulose, steam pretreatment, red yeasts, carotenoids, ergosterol
ISSN:0352-9568
1846-5153
DOI:10.15255/CABEQ.2015.2313