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Adaptation of Dekkera bruxellensis to lignocellulose-based substrate
Umeå University, Faculty of Science and Technology, Department of Plant Physiology. Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC).
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2014 (English)In: Biotechnology and applied biochemistry, ISSN 0885-4513, E-ISSN 1470-8744, Vol. 61, no 1, 51-57 p.Article in journal (Refereed) Published
Abstract [en]

Adaptation of Dekkera bruxellensis to lignocellulose hydrolysate was investigated. Cells of D. bruxellensis were grown for 72 and 192H in batch and continuous culture, respectively (adapted cells). Cultivations in semisynthetic medium were run as controls (nonadapted cells). To test the adaptation, cells from these cultures were reinoculated in the lignocellulose medium, and growth and ethanol production characteristics were monitored. Cells adapted to lignocellulose hydrolysate had a shorter lag phase, grew faster, and produced a higher ethanol concentration as compared with nonadapted cells. A stability test showed that after cultivation in rich medium, cells partially lost the adapted phenotype but still showed faster growth and higher ethanol production as compared with nonadapted cells. Because alcohol dehydrogenase genes have been described to be involved in the adaptation to furfural in Saccharomyces cerevisiae, an analogous mechanism of adaptation to lignocelluloses hydrolysate of D. bruxellensis was hypothesized. However, gene expression analysis showed that genes homologous to S. cerevisiae ADH1 were not involved in the adaptation to lignocelluloses hydrolysate in D. bruxellensis.

Place, publisher, year, edition, pages
2014. Vol. 61, no 1, 51-57 p.
Keyword [en]
Dekkera bruxellensis, lignocellulose, fermentation, adaptation
National Category
Genetics
Identifiers
URN: urn:nbn:se:umu:diva-90471DOI: 10.1002/bab.1145ISI: 000334516300008OAI: oai:DiVA.org:umu-90471DiVA: diva2:732995
Available from: 2014-07-07 Created: 2014-06-23 Last updated: 2017-12-05Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • ieee
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  • vancouver
  • Other style
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  • de-DE
  • en-GB
  • en-US
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Output format
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