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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Phenotypic characterisation of Saccharomyces spp. yeast for tolerance to stresses encountered during fermentation of lignocellulosic residues to produce bioethanol
Microbial Cell Factories, Volume 13, No. 1, Article 47, Year 2014
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Description
Background: During industrial fermentation of lignocellulose residues to produce bioethanol, microorganisms are exposed to a number of factors that influence productivity. These include inhibitory compounds produced by the pre-treatment processes required to release constituent carbohydrates from biomass feed-stocks and during fermentation, exposure of the organisms to stressful conditions. In addition, for lignocellulosic bioethanol production, conversion of both pentose and hexose sugars is a pre-requisite for fermentative organisms for efficient and complete conversion. All these factors are important to maximise industrial efficiency, productivity and profit margins in order to make second-generation bioethanol an economically viable alternative to fossil fuels for future transport needs.Results: The aim of the current study was to assess Saccharomyces yeasts for their capacity to tolerate osmotic, temperature and ethanol stresses and inhibitors that might typically be released during steam explosion of wheat straw. Phenotypic microarray analysis was used to measure tolerance as a function of growth and metabolic activity. Saccharomyces strains analysed in this study displayed natural variation to each stress condition common in bioethanol fermentations. In addition, many strains displayed tolerance to more than one stress, such as inhibitor tolerance combined with fermentation stresses.Conclusions: Our results suggest that this study could identify a potential candidate strain or strains for efficient second generation bioethanol production. Knowledge of the Saccharomyces spp. strains grown in these conditions will aid the development of breeding programmes in order to generate more efficient strains for industrial fermentations. © 2014 Wimalasena et al.; licensee BioMed Central Ltd.
Authors & Co-Authors
Wimalasena, Tithira T.
United Kingdom, Nottingham
University of Nottingham
Greetham, Darren
United Kingdom, Nottingham
University of Nottingham
Marvin, Marcus E.
United Kingdom, Leicester
University of Leicester
Liti, Gianni
France, Nice
Institut de Recherche Sur le Cancer et le Vieillissement, Nice
Chandelia, Yogeshwar
United Kingdom, Nottingham
University of Nottingham
Hart, Andrew
United Kingdom, Nottingham
University of Nottingham
Louis, E.
United Kingdom, Leicester
University of Leicester
Phister, Trevor G.
United Kingdom, Nottingham
University of Nottingham
United States, New York
Pepsico, Inc.
Tucker, Gregory A.
United Kingdom, Nottingham
University of Nottingham
Smart, Katherine A.
United Kingdom, Nottingham
University of Nottingham
South Africa, Sandton
Sabmiller Plc
Statistics
Citations: 56
Authors: 10
Affiliations: 5
Identifiers
Doi:
10.1186/1475-2859-13-47
e-ISSN:
14752859
Research Areas
Noncommunicable Diseases