RT Journal Article
T1 Factors influencing the production of the antioxidant hydroxytyrosol during alcoholic fermentation: Yeast strain, initial tyrosine concentration and initial must.
A1 Rebollo-Romero, Inmaculada
A1 Fernández-Cruz, Edwin
A1 Carrasco-Galán, Fernando
A1 Valero Blanco, Eva María
A1 Cantos-Villar, Emma
A1 B. Cerezo, Ana
A1 Troncoso, Ana M.
A1 Garcia-Parrilla, M. Carmen
K1 Bioactive
K1 Tyrosine
K1 S. cerevisiae
K1 Wine
K1 Alcoholic fermentation
AB Hydroxytyrosol is well known for its potent antioxidant activity and anticarcinogenic, antimicrobial, cardioprotective and neuroprotective properties. Main food sources are olive oil (formed from the hydrolysis of oleuropein) and wine. One possible explanation to its origin in wines is the synthesis from tyrosol, which in turn is produced from the Ehrlich pathway by yeasts. This work aims to explore the factors that could increase the content as the strain of yeast, the initial tyrosine concentrations as precursor and the effect of synthetic and sterilized natural grape musts. Alcoholic fermentations in synthetic must showed that hydroxytyrosol is produced by all the yeast strains under study. Commercial Saccharomyces cerevisiae yeasts were those which produced higher concentrations, being the Red Fruit strain the biggest producer (6.12 ng/mL). Once the strain was selected, alcoholic fermentations were performed in synthetic must, with different tyrosine concentrations. The amount of hydroxytyrosol did not increase in a proportional way as tyrosine does. On the other hand, higher concentrations of hydroxytyrosol were obtained in natural grape musts (10.46 ng/mL) than in synthetic must (4.03 ng/mL). This work confirms the capacity of winemaking yeasts to produce the bioactive hydroxytyrosol.
PB Elsevier
YR 2020
FD 2020-06-05
LK https://hdl.handle.net/10433/25331
UL https://hdl.handle.net/10433/25331
LA en
NO LWT - Food Science and Technology 130 (2020) 109631
NO Universidad Pablo de Olavide. Departamento de Biología Molecular e Ingeniería Bioquímica
DS RIO
RD May 8, 2026