IRNASUS   26003
INSTITUTO DE INVESTIGACIONES EN RECURSOS NATURALES Y SUSTENTABILIDAD JOSE SANCHEZ LABRADOR S.J.
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
PHENOTYPIC DIVERSITY OF PYRUVATE DECARBOXYLASE AMONG INDIGENOUS GRAPEVINEASSOCIATED STARMERELLA BACILLARIS AND SACCHAROMYCES CEREVISIAE
Autor/es:
ALBERTO LUIS ROSA; MARÍA LAURA RAYMOND EDER; CONTI, FRANCISCO
Reunión:
Congreso; Reunión Conjunta de Sociedades de Biociencias; 2017
Resumen:
This work is aimed to characterize the metabolic fermentative and pyruvate decarboxylase (PDC) biochemical phenotype of indigenous S.bacillaris and S. cerevisiae strains isolated from grape musts of Vitis vinifera and Vitis labrusca . PDC (EC 4.1.1.1) is a key enzyme at thebranch-point of the respiratory versus fermentative pathways and may present phenotypic diversity among wine yeast evolving indifferent Vitis ecosystems. We show here the preliminary characterization of PDC from S. bacillaris as well as fermentative growthphenotypes of indigenous S. bacillaris and S. cerevisiae strains. Observed PDC activities were highly dependent on the carbon source inthe culture medium. Furthermore, marked differences in PDC activities were found in S. cerevisiae cells growing in media supplementedwith glucose or fructose.