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L-Arabinose metabol...
L-Arabinose metabolism in Candida arabinofermentans PYCC 5603(T) and Pichia guilliermondii PYCC 3012: influence of sugar and oxygen on product formation
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Fonseca, Cesar (author)
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Spencer-Martins, Isabel (author)
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- Hahn-Hägerdal, Bärbel (author)
- Lund University,Lunds universitet,Teknisk mikrobiologi,Centrum för tillämpade biovetenskaper,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Applied Microbiology,Center for Applied Life Sciences,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH
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(creator_code:org_t)
- 2007-01-30
- 2007
- English.
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In: Applied Microbiology and Biotechnology. - : Springer Science and Business Media LLC. - 1432-0614 .- 0175-7598. ; 75:2, s. 303-310
- Related links:
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http://dx.doi.org/10...
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https://lup.lub.lu.s...
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Abstract
Subject headings
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- L-Arabinose utilization by the yeasts Candida arabinofermentans PYCC 5603(T) and Pichia guilliermondii PYCC 3012 was investigated in aerobic batch cultures and compared, under similar conditions, to D-glucose and D-xylose metabolism. At high aeration levels, only biomass was formed from all the three sugars. When oxygen became limited, ethanol was produced from D-glucose, demonstrating a fermentative pathway in these yeasts. However, pentoses were essentially respired and, under oxygen limitation, the respective polyols accumulated-arabitol from L-arabinose and xylitol from D-xylose. Different L-arabinose concentrations and oxygen conditions were tested to better understand L-arabinose metabolism. P. guilliermondii PYCC 3012 excreted considerably more arabitol from L-arabinose (and also xylitol from D-xylose) than C arabinofermentans PYCC 5603(T). In contrast to the latter, P guilliermondii PYCC 3012 did not produce any traces of ethanol in complex L-arabinose (80 g/l) medium under oxygen-limited conditions. Neither sustained growth nor active metabolism was observed under anaerobiosis. This study demonstrates, for the first time, the oxygen dependence of metabolite and product formation in L-arabinose-assimilating yeasts.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Industriell bioteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Industrial Biotechnology (hsv//eng)
Keyword
- Hemicellulose
- yeast
- fermentation conditions
- L-Arabinose
- pentose
- Candida arabinofermentans
- Pichia guilliermondii
Publication and Content Type
- art (subject category)
- ref (subject category)
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