Peduncle-girdling of Shiraz (Vitis viniferaL.) bunches and sugar concentration at the time of girdling affect wine volatile compounds

Background and Aims The climate change-related acceleration of grape (Vitis vinifera L.) berry ‘sugar-ripeness’ requires an improved understanding of the relationship between berry sugar concentration and wine flavour and aroma. Methods and Results Peduncle-girdling of Shiraz bunches at three post-veraison stages identified sugar-related changes to grape metabolites associated with ripening and to wine volatile compounds. Restricting sugar...