IVAS 2022 banner
IVES 9 IVES Conference Series 9 IVAS 9 IVAS 2022 9 Hanseniaspora in wine-making: their genetic modification and potential role in acid modulation

Hanseniaspora in wine-making: their genetic modification and potential role in acid modulation

Abstract

Hanseniaspora spp. are one of the most common yeast isolates in vineyards and wineries and play an important role in wine-making.  We explored the impact of an apiculate yeast Hanseniaspora occidentalis strain as a co-partner with Saccharomyces cerevisiae in a sequential-type mixed-culture fermentation of Muscaris grape must.  Like with other fermentation trials using Hanseniaspora strains, a significant increase in ethyl acetate was observed, but most intriguing, was the almost complete abolition of malic acid in the wine.  Compared to the pure S. cerevisiae inoculum there was also a marked increase in the concentrations of the other acetate esters. Modulation of some of the varietal elements like rose oxide was also observed.  Identifying and confirming the genes involved in malic acid utilization and aroma formation would require the development of gene modification tools: a feature not existing yet in H. occidentalis. We have recently developed gene-modifying tools in Hanseniaspora uvarum where we knocked-out the two alleles of the alcohol acetyltransferase gene (HuATF) resulting in a yeast with much lower acetate ester capabilities. This was the first successful attempt to genetically remove a gene from Hanseniaspora and paves the way for further gene-to-function studies in this apiculate yeast
genus

DOI:

Publication date: June 23, 2022

Issue: IVAS 2022

Type: Article

Authors

Van Wyk Niel¹, Badura Jennifer¹, Scansani Stefano¹,³, Pretorius Isak S.², Rauhut Doris1, Von Wallbrunn Christian¹

¹Department of Microbiology and Biochemistry, Hochschule Geisenheim University, Geisenheim, Germany
²ARC Centre of Excellence in Synthetic Biology, Department of Molecular Sciences, Macquarie University, Sydney, Australia
³Institute of Applied Microbiology, Justus-Liebig-University, Giessen, Germany

Contact the author

Keywords

Hanseniaspora, GMO, malic acid

Tags

IVAS 2022 | IVES Conference Series

Citation

Related articles…

Study to optimize the effectiveness of copper treatments for low impact viticulture

Among all pathologies that afflict grapevine, Downy Mildew (DM) is the most important. Generally controlled using Copper (Cu), recently European Commission confirmed its usage but limiting the maximum amount to 28 Kg per hectare in 7 years (Reg. EU 2018/1981).

Le pays du Brulhois

Depuis un an, nous essayons de mettre en place un projet de développement socio-économique et culturel d’une zone située essentiellement au sud de la Garonne et à cheval sur 3 départements (le Lot et Garonne, le Gers et le Tam et Garonne) et sur 2 régions (l’Aquitaine et Midi Pyrénées): le pays du Brulhois, “porte de la Gascogne”.

A novel approach for the identification of new biomarkers of wine consumption in human urine using untargeted metabolomics

Wine is one of the most representative components of Mediterranean diet. Moderate wine intake together with food, has been positively correlated with reduced risk of many chronic diseases. This beneficial effect seems to be ascribed to elevated polyphenolic content of wine [1]. Traditional approaches for the identification of wine biomarkers consumption include targeted metabolomics that focuses on the quantification of well-defined metabolites, losing a valuable information about a massive number of compounds. On the other hand, untargeted metabolomics can disclose a large quantity of signals corresponding to potential biomarkers in a single analysis with high sensitivity and resolution.

« Wine routes »: a collective brand to build a wine reputation on the basis of terroir and landscapes

Le marché international du vin est désormais tourné vers la qualité et les vignobles de vin de masse se transforment pour construire la qualité et la réputation de leurs produits. Cette construction s’appuie notamment sur la valorisation de ressources territoriales de nature physique (terroir, pacage, écosystème) et humaine (savoir-faire, culture, patrimoine…). Les « Routes des Vins » sont des exemples concrets de ces processus de «territorialisation», combinant ces ressources territoriales pour communiquer sur l’ancrage géographique et la spécificité des vins. Les «Routes des Vins» émergentes, observées dans les régions vitivinicoles en transition vers la qualité, en Languedoc Roussillon, à Mendoza (Argentine) et au Western Cape (Afrique du Sud), participent souvent à la valorisation des terroirs, en organisant un itinéraire sur le territoire associé, en faisant découvrir les vins «de qualité», les paysages, les pratiques et le savoir-faire associés à leur élaboration.

Exploring the influence of terroir on the sensorial and aroma profiles of wines – An application to red wines from AOC Corbières

The aromatic profile of a wine is the result of volatile molecules present in grapes (varietal or primary aromas) and those produced during the winemaking process of fermentation (secondary aromas) and during wine aging (tertiary aromas).