We have seen in Part I of Managing oxidative risk with biological tools how to fight oxidation in prefermentation stages with specific inactivated yeasts, such as GLUTASTAR™.
But there are also sensitive stages post fermentation, where wine needs to be protected from oxidation. PURE-LEES LONGEVITY™ is an essential tool to reach this goal.

Wine buyers, consumers and importers are increasingly concerned with the biogenic amines level in wine.
Selected wine bacteria, as well as Bactiless™ are the most efficient and natural solutions to prevent the production of biogenic amines.

How to manage the oxidative risk all along the winemaking process?

Issus de biomasses de levures, les produits dérivés de levure (levures inactivées, autolysats de levures, écorces de levures, extraits protéiques de levures, mannoprotéines) peuvent s’intégrer à chaque étape des itinéraires de vos vinifications et favoriser l’élaboration de vins de grande qualité. Illustration avec PURE LEES™ LONGEVITY dans la dernière Lettre d'Info "Au gré du vin"n°28.

This paper presents a research work carried out in collaboration with the University of Burgundy, which has highlighted the impact of a new specific inactivated yeast developed for the protection of musts and wines against oxidation.

This results from the application of an optimized production process to a unique strain of Saccharomyces cerevisiae yeast to maximize the biosynthesis and accumulation of intracellular glutathione and other compounds of interest.

Non-targeted metabolomic char...

In a collaborative study conducted with the ICV Group, Montpellier Supagro and the INRA Montpellier (through a PhD focusing on the genetic basis of sulfur production by yeast to identify the molecular determinants involved in the yeast’s SO₂ metabolism, carried out in 2011 by Jessica Noble with Bruno Blondin, from the INRA Montpellier as PhD supervisor), Lallemand Oenology identified, through an innovative QTL approach, the molecular basis of SO₂ production in yeast to eventually be able to re...

The magazine Wineland published in November 2019 an article in which is presented the research work Lallemand Oenology carried out in collaboration with the University of Burgundy. This article has highligthed he impact of a new specific inactivated yeast developed for the protection of musts and wines against oxidation.

Some red grape varieties, such as Shiraz, Pinot noir, Merlot or Tempranillo, have a certain trend to express sulfur off flavors and reduction characteristics. These characteristics mask the red fruit aromas and thus have a negative impact on wine.
To tackle this issue and bring a new solution to winemakers, Lallemand Oenology, Montpellier SupAgro and INRA Montpellier have collaborated and designed an innovative selection technique for yeast.

Protection of rosé and white musts against oxidation at the earliest stage of the winemaking process is key to prevent browing and loss of aromas in wine. The addition of inactivated dry yeasts (IDY) containing glutathione is now well known from the winemakers as a tool to limit oxidation phenomena in musts and wines. GLUTASTAR™ is a new specific inactivated yeast with guaranteed glutathione level offering more benefits to the wine than protection against oxidation only.

L’acétaldéhyde correspond à 50 % du SO2 lié dans les vins rouges. Moins ce composé est présent dans un vin, plus le SO2 ajouté va être efficace. La nouvelle génération de levures très faiblement productrices de SO2, composés soufrés négatifs et acétaldéhyde constitue donc un atout indéniable pour stabiliser son vin en ajoutant des teneurs plus modérées en sulfites. Découvrez la dernière sélection de levure issue de cette méthode brevetée : Vitilevure Sensation.