title: Effects of pH and temperature on growth and glycerol production kinetics of two indigenous wine strains of Saccharomyces cerevisiae from Turkey.
abstract: The study was performed in a batch system in order to determine the effects of pH and temperature on growth and glycerol production kinetics of two indigenous wine yeast strains Saccharomyces cerevisiae Kalecik 1 and Narince 3. The highest values of dry mass and specific growth rate were obtained at pH 4.00 for both of the strains. Maximum specific glycerol production rates were obtained at pH 5.92 and 6.27 for the strains Kalecik 1 and Narince 3, respectively. Kalecik 1 strain produced maximum 8.8 gL(-1) of glycerol at pH 6.46. Maximum glycerol concentration obtained by the strain Narince 3 was 9.1 gL(-1) at pH 6.48. Both yeasts reached maximum specific growth rate at 30°C. Optimum temperature range for glycerol production was determined as 25-30°C for the strain Kalecik 1. The strain Narince 3 reached maximum specific glycerol production rate at 30°C. Maximum glycerol concentrations at 30°C were obtained as 8.5 and 7.6 gL(-1) for Kalecik 1 and Narince 3, respectively.
authors.affiliation: Abant Izzet Baysal University, Faculty of Engineering and Architecture, Food Engineering Department , Golkoy, Bolu , Turkey.
authors.forename: Seda Karasu
authors.initials: SK
authors.lastname: Yalcin
authors.forename: Z
authors.initials: Z
authors.lastname: Yesim Ozbas
keywords: Glycerol; Growth parameters; Production kinetics; Saccharomyces cerevisiae
references.citation: J Appl Microbiol. 2000 Mar;88(3):371-8
references.pmid: 10747217
references.citation: Appl Microbiol Biotechnol. 2001 Jun;55(6):686-92
references.pmid: 11525615
references.citation: Appl Microbiol Biotechnol. 2001 Sep;56(5-6):577-88
references.pmid: 11601604
references.citation: Appl Environ Microbiol. 1993 Jul;59(7):2022-8
references.pmid: 8357243
references.citation: Biotechnol Adv. 2001 Jun;19(3):201-23
references.pmid: 14538083
references.citation: Appl Environ Microbiol. 1996 Sep;62(9):3187-95
references.pmid: 8795209