Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4367984 | International Journal of Food Microbiology | 2011 | 6 Pages |
Some lactic acid bacteria (LAB) isolated from fermented foods have been proven to degrade biogenic amines through the production of amine oxidase enzymes. Since little is known about this in relation to wine micro-organisms, this work examined the ability of LAB strains (n = 85) isolated from wines and other related enological sources, as well as commercial malolactic starter cultures (n = 3) and type strains (n = 2), to degrade histamine, tyramine and putrescine. The biogenic amine-degrading ability of the strains was evaluated by RP-HPLC in culture media and wine malolactic fermentation laboratory experiments. Although at different extent, 25% of the LAB isolates were able to degrade histamine, 18% tyramine and 18% putrescine, whereas none of the commercial malolactic starter cultures or type strains were able to degrade any of the tested amines. The greatest biogenic amine-degrading ability was exhibited by 9 strains belonging to the Lactobacillus and Pediococcus groups, and most of them were able to simultaneously degrade at least two of the three studied biogenic amines. Further experiments with one of the strains that showed high biogenic amine-degrading ability (L. casei IFI-CA 52) revealed that cell-free extracts maintained this ability in comparison to the cell suspensions at pH 4.6, indicating that amine-degrading enzymes were effectively extracted from the cells and their action was optimal in the degradation of biogenic amines. In addition, it was confirmed that wine components such as ethanol (12%) and polyphenols (75 mg/L), and wine additives such as SO2 (30 mg/L), reduced the histamine-degrading ability of L. casei IFI-CA 52 at pH 4.6 by 80%, 85% and 11%, respectively, in cell suspensions, whereas the reduction was 91%, 67% and 50%, respectively, in cell-free extracts. In spite of this adverse influence of the wine matrix, our results proved the potential of wine-associated LAB as a promising strategy to reduce biogenic amines in wine.
Research highlights► The ability to degrade histamine, tyramine and putrescine of 85 wine LAB was evaluated. ► Nine strains from Lactobacillus and Pediococcus exhibited the greatest amine degradation ability. ► Enzymatic activities from L. casei IFI-CA 52 cells showed an optimal amine degradation at pH 4.6. ► Ethanol, polyphenols and SO2 reduced the histamine-degradating ability of this strain. ► Results showed the potential of wine LAB to decrease biogenic amines in wine.