Influence of Yeast Mannoproteins in the Aroma Improvement of White Wines

• Published in: Journal of food science Vol. 77; no. 8; pp. M499 - M504
• Main Authors: Juega, M., Nunez, Y.P., Carrascosa, A.V., Martinez-Rodriguez, A.J.
• Format: Journal Article
• Language: English
• Published: Malden, USA Blackwell Publishing Inc 01.08.2012; Wiley; Wiley Subscription Services, Inc
• Subjects: Albariño; aroma; Biological and medical sciences; Chromatography; Chromatography, Gas; Fermented food industries; Food industries; Food Microbiology; Food science; Fundamental and applied biological sciences. Psychology; Fungal Proteins - analysis; Fungal Proteins - biosynthesis; Humans; mannoproteins; Mannose - analysis; Membrane Glycoproteins - analysis; Membrane Glycoproteins - biosynthesis; Monoterpenes - isolation & purification; Monoterpenes - metabolism; Odorants - analysis; Odors; Proteins; Saccharomyces cerevisiae - metabolism; Smell; Terpenes - isolation & purification; Terpenes - metabolism; Vitaceae; Vitis - chemistry; Vitis - microbiology; Volatile Organic Compounds - analysis; white wines; Wine - analysis; Wine - microbiology; Wines; Wines and vinegars; Yeast; Alcoholic beverage; Improvement; Yeast; White wine; mannoproteins; Albarino; Aroma; white wines
• ISSN: 0022-1147; 1750-3841
• DOI: 10.1111/j.1750-3841.2012.02815.x

:  In the present work, 3 different yeast strains (1, 2, and 3) were used to elaborate white wines using Albariño must. The concentration of polymeric mannose was determined using a method based on the mannoprotein precipitation, hydrolysis and analysis of sylylated mannose derivatives by gas chromatography. Wines elaborated with the strain 1 (W1) presented a higher mannoprotein concentration than the other wines. The analysis of the volatile composition of wines showed significant differences (P < 0.05) among them, being W1 which presented the highest concentration of aroma compounds, mainly terpens and norisoprenoids. The sensorial analysis of wines also showed that W1 had the best quality. The results obtained from this work demonstrate that mannoproteins could be involved in the behavior observed. Some evidences were obtained using a model wine, where 2 major terpens in W1 were preferentially retained by the colloids rich in mannoproteins released by strain 1. Practical Application:  White wines elaborated with yeast strains overproducing mannoproteins could have better quality than others. Mannoproteins could contribute to aroma enhancement of Albariño white wines