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Chiral Polyfunctional Thiols and Their Conjugated Precursors upon Winemaking with Five Vitis vinifera Sauvignon blanc Clones
- Liang ChenLiang ChenDepartment of Wine and Food Science, The University of Adelaide (UA), PMB 1, Glen Osmond, South Australia 5064, AustraliaMore by Liang Chen
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- Dimitra L. CaponeDimitra L. CaponeThe Australian Wine Research Institute (AWRI), PO Box 197, Glen Osmond, South Australia 5064, AustraliaMore by Dimitra L. Capone
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- Federico A. TondiniFederico A. TondiniDepartment of Wine and Food Science, The University of Adelaide (UA), PMB 1, Glen Osmond, South Australia 5064, AustraliaThe Australian Research Council Training Centre for Innovative Wine Production, The University of Adelaide, PMB 1, Glen Osmond, South Australia 5064, AustraliaMore by Federico A. Tondini
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- David W. Jeffery*David W. Jeffery*E-mail: [email protected]; Telephone: +61 8 83136649.Department of Wine and Food Science, The University of Adelaide (UA), PMB 1, Glen Osmond, South Australia 5064, AustraliaThe Australian Research Council Training Centre for Innovative Wine Production, The University of Adelaide, PMB 1, Glen Osmond, South Australia 5064, AustraliaMore by David W. Jeffery
Abstract
Five co-located clones of Sauvignon blanc grapes were fermented under controlled conditions at laboratory-scale to investigate the impact of yeast strain, commercial enzyme, or nutrient addition on the concentrations of enantiomers of 3-sulfanylhexan-1-ol (3-SH) and 3-sulfanylhexyl acetate (3-SHA) in resulting wines. The relationship of these enantiomers with the odorless 3-SH precursors present in diastereomeric forms in grape juice was also examined. Possible variations may have existed due to clone type, not only for the diastereomers of 3-SH precursors in juices but also for the enantiomers of 3-SH and 3-SHA in the resulting wines, although there was no obvious stereochemical relationship between precursors and free thiols. From a flavor enhancement perspective, the use of a commercial enzyme in the juice significantly enhanced 3-SH production for some clones. In contrast, less impact on the production of 3-SH and 3-SHA was seen as a result of yeast strain and nutrient regardless of clone type.
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