terclim by ICS banner
IVES 9 IVES Conference Series 9 International Congress on Grapevine and Wine Sciences 9 2ICGWS-2023 9 Yeast mannoprotein characterization and their effect on Oenococcus oeni and malolactic fermentation

Yeast mannoprotein characterization and their effect on Oenococcus oeni and malolactic fermentation

Abstract

Mannoproteins are released at the end of alcoholic fermentation due to yeast autolysis [1]. It has been described a positive effect of these molecules on lactic acid bacteria growth [2]. The main objective of this work was the characterization of different mannoproteins extracted from active dry yeast (ADY) and the assessment of their effect on Oenococcus oeni and malolactic fermentation (MLF).

The cell wall fraction of strains from different yeast species were extracted by autolysis and alkali methods: Saccharomyces cerevisiae, Torulaspora delbrueckii, Lachancea thermotolerans and Metschnikowia pulcherrima. The profiles of the polysaccharide fraction were analyzed by HPLC-DAD and HRSEC-RID. The protein and glycoprotein profiles were analyzed by SDS-PAGE. The effect on MLF of the addition of 2 g/L of each mannoprotein extract was evaluated in a wine like-medium using the O. oeni strain PSU-1 (ATCC BAA-331). The consumption of L-malic was monitored by an enzymatic method. The analysis of mannoprotein consumption, in terms of equivalents of mannose, was carried out by HPLC-MWC-RID.

The polysaccharide composition and the size of mannoproteins extracted by the two methods were significantly different for all the mannoproteins. Protein and glycoprotein profiles were also different in all the studied yeast walls. The addition of mannoprotein extract influenced the evolution of MLF differently according to the extraction method. Mannoproteins obtained by the yeast autolysis showed a positive effect on MLF in all cases; this effect was also observed in two S. cerevisiae and L. thermotolerans extracted by the alkali method. However, MLF was arrested after consuming 0.5 g/L of L-malic acid in the rest of fermentations with mannoproteins obtained by the alkali method. The results obtained indicate that the capacity of O. oeni to use mannoproteins depends on the mannoprotein composition, which in turns depends on the yeast species and the extraction method.

Keywords: Malolactic fermentation, mannoproteins, Oenococcus oeni

1) Chu-Ky S. et al. (2005). Biochimica et Biophysica Acta 1717, 118-124
2) Diez L. et al. (2010). Journal of Agricultural and Food Chemistry. 58, 7731–7739

DOI:

Publication date: October 5, 2023

Issue: ICGWS 2023

Type: Article

Authors

Paloma Toraño 1a*, María Oyón-Ardoiz 2, Elvira Manjón 2, Ignacio García-Estévez 2, Albert Bordons1a, Nicolas Rozès 1b, M. Teresa Escribano-Bailón2, Cristina Reguant 1a

1a Grupo de Biotecnología Enológica, 1bGrupo de Biotecnología Microbiana de los Alimentos, Departamento de Bioquímica y Biotecnología, Universitat Rovira i Virgili, Tarragona, España
2 Departamento de Química Analítica, Nutrición y Bromatología, Facultad de Farmacia, Universidad de Salamanca, España

Contact the author*

Keywords

Malolactic fermentation, mannoproteins, Oenococcus oeni

Tags

2ICGWS | ICGWS | ICGWS 2023 | IVES Conference Series

Citation

Related articles…

Evaluation of phenology, agronomic and oenological quality in minority wine varieties in Madrid as a strategy for adaptation to climate change

The main phenological stages (budburst, flowering, veraison, and ripeness) and the fruit composition of 34 Spanish minority varieties were studied to determine their cultivation potential and help winegrowers adapt their production systems to climate change conditions. In total, 4 control cultivars, and 30 minority varieties from central Spain were studied during a period of 3 campaigns, in the ampelographic collection “El Encín”, in Alcalá de Henares, Madrid. Agronomic and oenological characteristics such as yield, and total soluble solids concentration have been monitored.

Molecularly imprinted polymers: an innovative strategy for harvesting polyphenoles from grape seed extracts

Multiple sclerosis (MS) is a multifactorial autoimmune disease associating demyelination and axonal degeneration developing in young adults and affecting 2–3 million people worldwide. Plant polyphenols endowed with many therapeutic benefits associated with anti-inflammatory and antioxidant properties represent highly interesting new potential therapeutic strategies. We recently showed the safety and high efficiency of grape seed extract (GSE), a complex mixture of polyphenolics compounds comprising notably flavonoids and proanthocyanidins, in an experimental autoimmune encephalomyelitis (EAE) mouse model of MS.

Acceptability of canned wines: effect of the level of involvement of consumers and type of wine

In recent years there has been a growing demand for alternative packaging designs in the food industry focused on diminishing the carbon footprint. Despite the environmental advantages of cans versus bottles, the traditional environment of wine has hindered the establishment of less contaminant containers. In this context, the objective of this study was to understand and generate knowledge about consumers´ perception of canned wines in comparison to bottled wines.

Effect of rising atmospheric CO2 levels on grapevine yield and composition by the middle of the 21st century: what can we learn from the VineyardFACE?

Atmospheric CO2 levels have been rising continuously since the industrial revolution, affecting crop physiology, yield and quality of harvest products, and grapevine is no exception [1]. Most of previously reported studies used potted plants in controlled environments, and explored grapevine response to relatively high CO2 levels, 700 ppm or more. The vineyardFACE, established in Geisenheim in 2012, uses a free air carbon dioxide enrichment (FACE) system to simulate a moderate (ambient +20%) increase in atmospheric CO2 in a vineyard planted with cvs. Cabernet-Sauvignon and Riesling grafted on rootstock 161-49 Couderc and SO4, respectively.

Anthocyanin content and composition of Merlot grapes under temperature and late pruning conditions 

One of the main aspects of Climate Change is the increase of temperatures during summer and grape maturity period. Physiological processes are influenced by these high temperatures and result in grapes with higher sugar concentration, less acidity and less anthocyanin content among other quality changes. One strategy to deal with the climate change effects is the implementation of late winter pruning to alter the effect of high temperatures during key periods by delays in maturity time.