Effects of UV-B and Water Deficit on Aroma Precursors in Grapes and Flavor Release during Wine Micro-Vinification and Consumption

Yifan Zhu; Meng Sun; Roland Harrison; Brian Jordan; Glen Creasy; Rainer Hofmann

doi:10.3390/foods11091336

Effects of UV-B and Water Deficit on Aroma Precursors in Grapes and Flavor Release during Wine Micro-Vinification and Consumption

Foods. 2022 May 4;11(9):1336. doi: 10.3390/foods11091336.

Authors

Yifan Zhu^{1

2

3}, Meng Sun^{2

4}, Roland Harrison², Brian Jordan², Glen Creasy⁵, Rainer Hofmann²

Affiliations

¹ College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, China.
² Centre for Viticulture and Oenology, Faculty of Agriculture and Life Sciences, Lincoln University, Christchurch 7674, New Zealand.
³ University Engineering Research Center for Grape & Wine of Yunan Province, Yunnan Agricultural University, Kunming 650201, China.
⁴ Jiangsu Academy of Agricultural Sciences (JAAS), Nanjing 210014, China.
⁵ Sabrosia SAS, 30170 Pompignan, France.

Abstract

UV-B radiation and water availability can affect amino acids(AAs) concentration in berries, resulting in the evolution of aroma compounds during alcoholic fermentation. This study investigated the effects of UV-B exposure and water availability onwine aroma compounds in Pinot noir, focusing on the role of AAs in the process.Enhanced UV-B radiation significantly decreased total AA concentrations and most individual AAs inberries and wines, while water deficitincreased some individual AAsin wines. Higher alcohols, fatty acids, esters, monoterpenes, and C₁₃-norisoprenoids were affected by UV-B interaction with water deficit in wines. These results suggested individual or combined UV-B exposure and water deficit had direct effects on fruit AAs, leading to significant differences in some wine aroma compounds.

Keywords: Pinot noir; UV-B; amino acids; aroma compounds; micro-vinification; water deficit.

Grants and funding

This work was supported by the Major Science and Technology Project in Yunnan Province of China (no. 202001BB050001).