0000000000255969
AUTHOR
Jose Maria Heras
Influence of yeast strains on managing wine acidity using Lactobacillus plantarum
Abstract Lactobacillus plantarum has been used for deacidifying wines through malolactic fermentation (MLF), and more recently for acidifying them. The species Oenococcus oeni is mainly responsible for MLF in wines at a pH below 3.5. However, the Lactobacillus and Pediococcus species can carry out this reaction in wines at a higher pH. MLF generally begins once yeasts have completed alcoholic fermentation, but nowadays some winemakers prefer carrying out MLF simultaneously to alcoholic fermentation. The advantages of this strategy are shorter times in which to complete wine vinification and better wine color stabilization. Lactobacillus plantarum is preferred to O. oeni for performing early…
Use of starter cultures ofLactobacillusto induce malolactic fermentation in wine
Background and Aims Oenococcus oeni is the lactic acid bacteria species that best adapts to harsh wine conditions. This species is currently the main component of the malolactic starter cultures used in winemaking. Other species of lactic acid bacteria, however, such as Lactobacillus, can also conduct the malolactic fermentation, especially in low acidity wines. This study aimed to identify suitable Lactobacillus strains and inoculation methods to undertake the malolactic fermentation in wines with pH > 3.5. Methods and Results Six Lactobacillus strains of species L. mali (E4634), L. paracasei (E4539, E4541), L. plantarum (E4538, E4608) and L. satsumensis (E4555) were selected for their goo…
Selection of Lactobacillus strains to induce biological acidification in low acidity wines
Abstract Because of global warming, wines are obtained nowadays with high pH values and low acidity. This results in wines with disturbed flavor and increased susceptibility of microbial spoilage. The aim of this work was the selection of Lactobacillus strains with ability to induce biological acidification in low acidity grape musts to obtain more acidic wines. A screening of Lactobacillus strains was carried out using several selection criteria. Lactobacillus strains that grew in must, carried out the malolactic fermentation, acidified grape must, synthesized lactic acid from sugars, and showed high resistance to lysozyme and sulfur dioxide were selected. Selected strains were characteriz…