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Abstract
The Sao Francisco Valley, in Brazil, is a region with harvest of grapes more than once a year due to the peculiar climate condition, being important to evaluate new agronomic variables for the vines and elucidade its influence on wine quality and nutritional compounds. Syrah vines grafted on different rootstocks (IAC-313 and Paulsen 1103) were cultivated in semi-arid conditions in Petrolina, PE, Brazil, and the quality of the wine was evaluated for color, sugars, acidity, phenolic compounds, antioxidant activity and the presence and contents of eight biogenic amines by HPLC (putrescine (PUT) dihydrochloride, spermidine (SPD) trihydrochloride, spermine (SPM) tetrahydrochloride, agmatine (AGM) sulfate, cadaverine (CAD) dihydrochloride, serotonine (SRT) hydrochloride, histamine (HIM) dihydrochloride, tyramine (TYM), tryptamine (TRM) and 2-phenylethylamine (PHM) dihydrochloride). For total sugars, color and antocyanins content in the evaluated wines, no effect from the rootstock was observed. For the wine produced with grapes from Syrah wines grafted on Paulsen 1103 rootstock, was observed the presence of putrescine, agmatine and phenylethylamine with the contents of 8.04, 0.15 and 0.22 |jg mL-1, respectively. The use of the rootstock IAC-313 on Syrah vines at the Sao Francisco Valley semiarid conditions, Brazil, resulted in wines with a statistical lower pH and soluble solid contents and higher antioxidant activity and phenolic contents, with only the presence of putrescine of the studied biogenic amines.
Keywords: antioxidant activity, phenolic compounds, semiarid, Vitis vinifera
Introduction
The Sao Francisco Valley, located at the Northeast of Brazil, is a region with a dry and hot climate, with temperatures that are not sufficient to induce the vine dormancy (lower than 12°C), however, with the present structure and irrigation management is possible the viticulture and the production of fruits with higher quality.
Syrah (Vitis vinifera L.) is an international red cultivar, considered to be one of the noble black grape varieties due to its ability to produce dark, full-bodied, and age-worthy wines (Condurso et al., 2016) and also demonstrated a good performance on the climatic conditions of the Sao Francisco Valley.
The effect of grape rootstock on grape and wine composition is controversial, mainly for red grapes. Many of these tests provide conflicting information, depending on the cultivar, environmental conditions and experimental area. According to Ledo et al. (2009), at the Sao Francisco Valley, the...