Breaking the sugar flavour nexus growing grapes with more flavour and less sugar
As grapes ripen sugar accumulates by translocation into the bunches, while at the same time a range of specialised flavour compounds are produced by metabolic activities within the berries. These processes display a seemingly tightly linked pairing. Recent increases in growing season temperatures, and winemakers’ preferences for reduced concentrations of the aroma compounds associated with immature berries, have resulted in wines with undesirably high alcohol levels.
The objective of the proposed research is to identify strategies that will allow grape-growers to produce fruit with high levels of desirable flavour compounds while maintaining concentrations of sugar that will result in moderate levels of alcohol in the finished wine.
This will be achieved by metabolite and enzyme profiling of grapes from a range of sites in Australia and the USA, examining the effects of site and viticultural practices on grapevine and berry metabolism. A detailed understanding of the metabolism behind the apparent linkage of these events will help growers develop practices to maximise flavour production without excessive sugar, and hence alcohol, in wines. Growers and consumers will each benefit through increased quality and alcohol management.
Could you tell us a bit about yourself and your academic background?I was born in Perth, Western Australia but moved to Edinburgh, Scotland when I was seven. I finished my Honours degree in Chemistry with Medicinal Chemistry from the University of Glasgow...read more
Dr Dimitra Capone was invited to the recent 2019 Limestone Coast Wine Show (LCWS) as an associate wine judge and to speak about her research in the ARC Training Centre for Innovative Wine Production.The LCWS had announced that sparkling wine entries had...read more
The ARC Training Centre for Innovative Wine Production invites members of the Barossa Valley wine industry to join us on the morning of Wednesday 20 November, when Centre researchers will present their latest findings. Centre Director, Professor Vladimir Jiranek,...read more