Environmental Factors and Seasonality Affect the Concentration of Rotundone in Vitis vinifera L. cv. Shiraz Wine
Pangzhen Zhang, Kate Howell, Mark Krstic, Markus Herderich, Edward William R Barlow, Sigfredo Fuentes
PLOS ONE | PUBLIC LIBRARY SCIENCE | Published : 2015
Rotundone is a sesquiterpene that gives grapes and wine a desirable 'peppery' aroma. Previous research has reported that growing grapevines in a cool climate is an important factor that drives rotundone accumulation in grape berries and wine. This study used historical data sets to investigate which weather parameters are mostly influencing rotundone concentration in grape berries and wine. For this purpose, wines produced from 15 vintages from the same Shiraz vineyard (The Old Block, Mount Langi Ghiran, Victoria, Australia) were analysed for rotundone concentration and compared to comprehensive weather data and minimal temperature information. Degree hours were obtained by interpolating ava..View full abstract
Awarded by Australian Government
This work was jointly sponsored by the Rathbone Wine Group, The University of Melbourne, The Australian Wine Research Institute (AWRI) and Australia Grape and Wine Authority. The work was performed at University of Melbourne and AWRI, and supported by Australia's grape growers and winemakers through their investment body, the Australia Grape and Wine Authority, with matching funds from the Australian Government (Grant number: GWR Ph1203). Funding was also received from the Faculty of Veterinary and Agricultural Sciences, University of Melbourne. Co-authors Mark Krstic and Markus Herderich are employed by Australian Wine Research Institute. Australian Wine Research Institute provided support in the form of salaries for authors MK and MH, and provided support in data collection, but did not have any additional role in the study design, data analysis, decision to publish, or preparation of the manuscript. The specific roles of these authors are articulated in the 'author contributions' section. Rathbone Wine Group had a role in data collection, but had no role in study design, data analysis, decision to publish, or preparation of the manuscript. Australia Grape and Wine Authority had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.