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Isolation of xylose-assimilating yeasts and optimization of xylitol production by a new Meyerozyma guilliermondii strain.
da Silveira, Fernando Augusto; Fernandes, Tatiana Alves Rigamonte; Bragança, Caio Roberto Soares; Balbino, Thércia Rocha; Diniz, Raphael Hermano Santos; Passos, Flávia Maria Lopes; da Silveira, Wendel Batista.
Afiliación
  • da Silveira FA; Laboratory of Microbial Physiology, Department of Microbiology, Universidade Federal de Viçosa, Av. P. H. Rolfs, s/n, Campus Universitário, Viçosa, MG, 36570-900, Brazil.
  • Fernandes TAR; Laboratory of Microbial Physiology, Department of Microbiology, Universidade Federal de Viçosa, Av. P. H. Rolfs, s/n, Campus Universitário, Viçosa, MG, 36570-900, Brazil.
  • Bragança CRS; Laboratory of Microbial Physiology, Department of Microbiology, Universidade Federal de Viçosa, Av. P. H. Rolfs, s/n, Campus Universitário, Viçosa, MG, 36570-900, Brazil.
  • Balbino TR; Laboratory of Microbial Physiology, Department of Microbiology, Universidade Federal de Viçosa, Av. P. H. Rolfs, s/n, Campus Universitário, Viçosa, MG, 36570-900, Brazil.
  • Diniz RHS; Laboratory of Microbial Physiology, Department of Microbiology, Universidade Federal de Viçosa, Av. P. H. Rolfs, s/n, Campus Universitário, Viçosa, MG, 36570-900, Brazil.
  • Passos FML; Instituto Federal de Educação, Ciência e Tecnologia de Minas Gerais - Campus Ouro Preto, CODACIB, Ouro Preto, MG, Brazil.
  • da Silveira WB; Laboratory of Microbial Physiology, Department of Microbiology, Universidade Federal de Viçosa, Av. P. H. Rolfs, s/n, Campus Universitário, Viçosa, MG, 36570-900, Brazil.
Int Microbiol ; 23(2): 325-334, 2020 May.
Article en En | MEDLINE | ID: mdl-31813072
Production of xylitol from lignocellulosic biomass is of interest to modern biorefineries, because this biomass should be processed into a spectrum of chemicals (bio-based products) and not only energy. The isolation of new yeast strains capable of efficiently converting xylose into xylitol and withstanding inhibitors released from biomass hydrolysis can contribute to making its production feasible in biorefineries. Forty-three out of 128 yeast strains isolated from the gut of Passalidae beetles were capable of assimilating xylose as the sole carbon source. Meyerozyma guilliermondii UFV-1 was selected due to its ability to grow and ferment D-xylose in a synthetic medium. This yeast assimilated the broad range of sugars present in lignocellulosic biomass hydrolysates, such as xylose, raffinose, cellobiose, rhamnose, arabinose, and glucose. Its optimum growth conditions were pH 8.0 and a temperature of 30 °C. In concentrations of 0.07 mol/L acetic acid, 0.05 mol/L 5-hydroximethylfurfural, and 0.04 mol/L furfural, M. guilliermondii UFV-1 did not grow. Maximum xylitol production in aerobiosis and hypoxia were 51.88 and 27.73 g/L, respectively. Under aerobic condition, xylose concentration and agitation rate were the factors which were statistically significant, while only the agitation rate was significant in hypoxia. We fitted a response surface (RS) that estimated the best agitation rate (113.33 rpm) and xylose concentration (90 g/L) for maximum xylitol production in aerobiosis. Therefore, M. guilliermondii UFV-1 displays potential for being used for xylitol production in biorefineries.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Xilitol / Xilosa / Levaduras Idioma: En Revista: Int Microbiol Asunto de la revista: MICROBIOLOGIA Año: 2020 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Suiza
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Xilitol / Xilosa / Levaduras Idioma: En Revista: Int Microbiol Asunto de la revista: MICROBIOLOGIA Año: 2020 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Suiza