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How do fuel ethanol yeasts and contaminating lactic acid bacteria respond toward lignocellulosic-derived inhibitors?

Abstract

Production of biofuels from lignocellulosic (LC) residues should be fuelling the energy matrix in the near future. Yeasts will play an important role as platform microorganisms for the conversion processes of LC-derived sugars into, for instance, fuel ethanol but also other advanced fuels and chemicals. Fermentation of LC hydrolysates poses many scientific and technological challenges. For example, besides the problem of fermenting pentose sugars, pretreatment processes generate various yeast growth inhibitors (furan-derivatives, phenolics and organic acids), which reduce the efficiency of fermentation. In this context, the present research proposal aims to investigate the effect of LC inhibitors in fuel ethanol yeasts, as well as in contaminating lactic acid bacteria, that normally are present in industrial fermentation processes. This will be accomplished by an in-depth physiological characterization of yeast strains under the presence of inhibitory compounds encountered during industrial fermentation of lignocellulosic-derived feedstock. Complementary to the physiological characterization, yeast strain improvement will be attempted by evolutionary engineering (EE). EE strategies will be attempted using a small-scale sequential batch fermentation setup and/or prolonged chemostat cultivations. Ultimately, we aim to understand how strains of yeasts and contaminating lactic acid bacteria respond to LC-inhibitory compounds and, possible to obtain yeast strains more tolerant toward these compounds, using evolutionary engineering. (AU)

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Scientific publications (13)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
GRACA, CATIA A. L.; DALLE LUCCA, BEATRIZ ARNAUT; COLA, PRISCILA; BASSO, THIAGO O.; TEIXEIRA, ANTONIO CARLOS S. C. Photodegradation of Enrofloxacin by the Photo-Fenton-Like Reaction Using UVA-Irradiated Iron(III)-Tartrate as a Source of Iron(II). JOURNAL OF ENVIRONMENTAL ENGINEERING, v. 146, n. 12 DEC 1 2020. Web of Science Citations: 0.
PRADO, CLEITON D.; MANDRUJANO, GUSTAVO P. L.; SOUZA, JONAS. P.; SGOBBI, FLAVIA B.; NOVAES, HOSANA R.; DA SILVA, JOAO P. M. O.; ALVES, MATEUS H. R.; ELIODORIO, KEVY P.; CUNHA, GABRIEL C. G.; GIUDICI, REINALDO; PROCOPIO, DIELE P.; BASSO, THIAGO O.; MALAVAZI, IRAN; CUNHA, ANDERSON F. Physiological characterization of a new thermotolerant yeast strain isolated during Brazilian ethanol production, and its application in high-temperature fermentation. BIOTECHNOLOGY FOR BIOFUELS, v. 13, n. 1 OCT 27 2020. Web of Science Citations: 0.
ALDER-RANGEL, ALENE; IDNURM, ALEXANDER; BRAND, ALEXANDRA C.; BROWN, ALISTAIR J. P.; GORBUSHINA, ANNA; KELLIHER, CHRISTINA M.; CAMPOS, CLAUDIA B.; LEVIN, DAVID E.; BELL-PEDERSEN, DEBORAH; DADACHOVA, EKATERINA; BAUER, FLORIAN F.; GADD, GEOFFREY M.; BRAUS, GERHARD H.; BRAGA, GILBERTO U. L.; BRANCINI, GUILHERME T. P.; WALKER, GRAEME M.; DRUZHININA, IRINA; POCSI, ISTVAN; DIJKSTERHUIS, JAN; AGUIRRE, JESUS; HALLSWORTH, JOHN E.; SCHUMACHER, JULIA; WONG, KOON HO; SELBMANN, LAURA; CORROCHANO, LUIS M.; KUPIEC, MARTIN; MOMANY, MICHELLE; MOLIN, MIKAEL; REQUENA, NATALIA; YARDEN, ODED; CORDERO, RADAMES J. B.; FISCHER, REINHARD; PASCON, RENATA C.; MANCINELLI, ROCCO L.; EMRI, TAMAS; BASSO, THIAGO O.; RANGEL, DRAUZIO E. N. The Third International Symposium on Fungal Stress - ISFUS. FUNGAL BIOLOGY, v. 124, n. 5, p. 235-252, MAY 2020. Web of Science Citations: 2.
WALKER, GRAEME M.; BASSO, THIAGO O. Mitigating stress in industrial yeasts. FUNGAL BIOLOGY, v. 124, n. 5, p. 387-397, MAY 2020. Web of Science Citations: 2.
COLA, PRISCILA; PROCOPIO, DIELLE PIEROTTI; ALVES, ADRIANA TABOSA DE CASTRO; CARNEVALLI, LUCIANA REBELO; SAMPAIO, ICARO VIANA; DA COSTA, BRUNO LABATE VALE; BASSO, THIAGO OLITTA. Differential effects of major inhibitory compounds from sugarcane-based lignocellulosic hydrolysates on the physiology of yeast strains and lactic acid bacteria. Biotechnology Letters, v. 42, n. 4, p. 571-582, APR 2020. Web of Science Citations: 2.
VALE DA COSTA, BRUNO LABATE; RAGHAVENDRAN, VIJAYENDRAN; MERCIER FRANCO, LUIS FERNANDO; CHAVES FILHO, ADRIANO DE BRITTO; YOSHINAGA, MARCOS YUKIO; MIYAMOTO, SAYURI; BASSO, THIAGO OLITTA; GOMBERT, ANDREAS KAROLY. Forever panting and forever growing: physiology of Saccharomyces cerevisiae at extremely low oxygen availability in the absence of ergosterol and unsaturated fatty acids. FEMS Yeast Research, v. 19, n. 6 SEP 2019. Web of Science Citations: 1.

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