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Title: Ethanol production from selected lignocellulosic hydrolysates by genome shuffled strains of Scheffersomyces stipitis
Authors: Paramjit K. Bajwa
Chetsada Phaenark
Nicola Grant
Xiao Zhang
Michael Paice
Vincent J.J. Martin
Jack T. Trevors
Hung Lee
University of Guelph
Universite Concordia
FPInnovations - Pulp and Paper Division
Mahidol University
McGill University
Washington State University Tri-Cities
Keywords: Chemical Engineering;Energy;Environmental Science
Issue Date: 1-Nov-2011
Citation: Bioresource Technology. Vol.102, No.21 (2011), 9965-9969
Abstract: Two genome-shuffled Scheffersomyces stipitis strains, GS301 and GS302, exhibiting improved tolerance to hardwood spent sulphite liquor, were tested for growth and fermentation performance on three wood hydrolysates: (a) steam-pretreated enzymatically hydrolyzed poplar hydrolysate from Mascoma Canada, (b) steam pretreated poplar hydrolysate from University of British Columbia Forest Products Biotechnology Laboratory, and (c) mixed hardwoods pre-hydrolysate from FPInnovations (FPI). In the FPI hydrolysate, the wild type (WT) died off within 25. h, while GS301 and GS302 survived beyond 100. h. In fermentation tests, GS301 and GS302 completely utilized glucose and xylose in each hydrolysate and produced 0.39-1.4% (w/v) ethanol. In contrast, the WT did not utilize or poorly utilized glucose and xylose and produced non-detectable to trace amounts of ethanol. The results demonstrated cross tolerance of the mutants to inhibitors in three different wood hydrolysates and reinforced the utility of mating-based genome shuffling approach in industrial yeast strain improvement. © 2011 Elsevier Ltd.
ISSN: 18732976
Appears in Collections:Scopus 2011-2015

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