Influence of different rootstocks on the characteristics of Vermentino wines at altitudes in Santa Catarina

The objective of this study was to determine the best rootstock that enhances the enological characteristics of the Vermentino grape variety cultivated in the high-altitude region of Santa Catarina, Brazil, over three vintages (2018, 2019, and 2020). Four rootstocks were evaluated: '101-14 Mgt', 'Harmony', 'Paulsen 1103', and 'VR 043-43'. The physicochemical and sensory properties of the wines were assessed. The findings revealed that the rootstocks '101-14 Mgt', 'Harmony', 'Paulsen 1103', and 'VR 043-43' produced wines with the lowest total acidity in the 2019 vintage. The alcohol content was notably lower in wines produced with 'VR 043-43' in 2021. Sensory analysis indicated that wines made with the '101-14 Mgt' and 'Harmony' rootstocks in the 2019 vintage exhibited higher turbidity. The herbaceous character was most pronounced in the 2019 vintage, with a stronger herbaceous aroma regardless of the rootstock used. Acidity levels were highest in the wines from the 2021 vintage, particularly in those made with the 'Harmony' and 'VR043-43' rootstocks.