Rootstocks Effects on the Physicochemical Characteristics of Bordô, Isabel and Iac 138-22 Máximo Must and Wine

Abstract

-It has been demonstrated that rootstocks can influence grape characteristics, but there are few data in literature about the rootstocks influence in the wine characteristics, especially in wines elaborated with Vitis labrusca or hybrid grapes. This study evaluated the influence of Mgt' rootstocks on the physicochemical characteristics of 'Bordô', 'Isabel' and 'IAC 138-22 'Máximo' musts and wines. The musts were evaluated for pH, soluble solids, total acidity and soluble solids/acidity ratio. The wines were evaluated for density, alcohol content; total, volatile and fixed acidity; pH, dry extract, reducing sugars, reduced dry extract, alcohol in weight/reduced dry extract; free and total sulfur dioxide; anthocyanins, polyphenols index (I 280); polyphenols and total flavonoids and antioxidant activity. The 'Bordô', 'Isabel' and IAC 138-22 'Máximo' musts had low soluble solids for winemaking. The '106-8 Mgt' rootstock promoted higher dry extract content and reduced dry extract in Bordô wine, and lower total and fixed acidity in IAC 138-22 Máximo wine. In Isabel wine, higher pH was promoted by the 'IAC 766' rootstock. Aside from low total acidity of the Bordô wine, all the physicochemical characteristics of the wines studied are in accordance with Brazilian law. There was no effect of rootstocks in the phenolics content and antioxidant activity of wines. Index terms: Vitis sp., table wine, classical analysis, phenolic compounds, antioxidant activity. INFLUÊNCIA DE PORTA-ENXERTOS NAS CARACTERÍSTICAS FÍSICO-QUÍMICAS DO MOSTO E DOS VINHOS BORDÔ, ISABEL E IAC 138-22 MÁXIMO

Productive performance and physicochemical quality of grapes for processing grown on different rootstocks

“…In addition to tolerating some fungal diseases or having high yields, the cultivars developed by Embrapa show climate adaptability, as well as desired chemical and sensory attributes. However, grape yield and quality can be influenced by other factors, including the used rootstocks (Bascunán-Godoy et al, 2017;Silva et al, 2017). 'IAC 766 Campinas' and 'IAC 572 Jales' are among the most used rootstocks in viticulture in the state of São Paulo .…”