Organic Acids and Sugars in Musts of Irrigated Grapevines in Northeast Portugal

Oliveira, Manuel; Sousa, T. A. S.

doi:10.1080/09571260902978485

Cited by 8 publications

(16 citation statements)

References 28 publications

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“…Over the three-year period, the "Regent" and "Ambror" registered the highest variation. The soluble solids, titratable acids and pH values were measured to assess the grape quality [32]. A high variability was observed among the hybrids (Figure 3), which reflect differences in their genotypes and the annual climate conditions, consistent with the observations of Pavloušek and Kumšta [33], showing the strong effect of the year and cultivar on the pH values and titratable acid contents.…”

Section: Grape Production and Qualitysupporting

confidence: 62%

Performance of interspecific grapevine varieties in north-east Italy

Pacifico¹,

Gaiotti²,

Mirella³

et al. 2013

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A renewed interest in inter-specific varieties has recently emerged, due mainly to producers and consumers more aware of organic farming and impact of phytochemicals in the environment. The assessment of 19 European Vitis hybrids was investigated in an area mostly dedicated to viticulture, the North-Eastern Italy. Major agronomic traits, yield, quality characteristics and disease resistance were evaluated during a three-year period (2004 to 2006). Wine sensory analyses were performed and compared with international Vitis vinifera varieties. Even though no genotypes resulted adequate for market release, the results obtained confirm the potential importance of hybrids in an "eco-friendly" viticulture and identify the genotypes interesting for further investigation and breeding: GF 138-3 and GA 48-12 showed good agronomic performance, resistance to more grape diseases and high quality wine.

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Section: Grape Production and Qualitysupporting

confidence: 62%

Performance of interspecific grapevine varieties in north-east Italy

Pacifico¹,

Gaiotti²,

Mirella³

et al. 2013

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“…Titratable acids in must belong to the parameters that are routinely used for the grapes quality estimation (Oliveira & Sousa 2009).…”

Section: Resultsmentioning

confidence: 99%

Profiling of primary metabolites in grapes of interspecific grapevine varieties: sugars and organic acids

Pavloušek¹,

Kumšta²

2011

Czech J. Food Sci.

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Abstract:Pavloušek P., Kumšta M. (2011): Profiling of primary metabolites in grapes of interspecific grapevine varieties: sugars and organic acids. Czech J. Food Sci., 29: 361-372.The quality of grapes is determined above all by the contents of the primary and secondary metabolites. The primary metabolites involve sugars and organic acids, and just these compounds are dealt with in this study. Its objective was to analyse and critically evaluate the primary metabolites in new interspecific varieties and, based on a comparison with European varieties of grapevine (Vitis vinifera L.), to find out the similarities and also possible differences between them. The study evaluates and compares 4 conventional varieties of Vitis vinifera with 11 new interspecific cultivars. The contents and compositions of the individual sugars and acids were estimated by means of the HPLC method. Most of these varieties belong to the group with either medium or low content of malic acid, i.e. with a medium to high β ratio. This corroborates the similarity of interspecific varieties to those of V. vinifera. The cluster analysis identified the existence of two interesting groups of varieties: the first one involved the varieties Riesling, Nativa, Marlen, and Kofranka while the other group consisted of varieties Blaufränkisch, Blauer Portugieser, and Laurot. This observation also indicates similarity between Vitis vinifera L. varieties and interspecific cultivars and demonstrates that the contents of the primary metabolites (i.e. sugars and organic acids) are also comparable.

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“…We reported earlier (Oliveira and Sousa 2009) that soluble solids of the musts showed a highly significant correlation (0.960) with soil water content after veraison, but no significant correlation was found before veraison, denoting the effect of the content dilution into larger berries and the availability of soil water during the accumulation of soluble solids. Thus, treatment FM corresponded to significantly lower TSS (23.8 8Brix), and the opposite for treatment NI with the highest TSS value (29.7 8Brix).…”

Section: Resultsmentioning

confidence: 82%

“…Among the other irrigation treatments, FV 1 had higher TSS than FV 2 ¼ VM 1 , that in turn were higher than VM 2 . The must TA (g L 71 equivalent of tartaric acid) was influenced by soil water content and both parameters were highly correlated (0.942) (Oliveira and Sousa 2009). However, there was no significant difference between FV 1 (2.4) and VM 1 (2.5) and between FV 2 (2.7) and VM 2 (2.7).…”

Section: Resultsmentioning

confidence: 97%

“…Previously, we reported on the effect of irrigation on sugars and organic acids content of the musts (Oliveira and Sousa 2009). In this study, the objective was to determine the WUE of different irrigation strategies for grapevines, to give wine producers an additional tool to optimize irrigation, reducing water use and waste with the least negative effect upon their production goals.…”

Section: Introductionmentioning

confidence: 99%

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Water use efficiency and must quality of irrigated grapevines of north-eastern Portugal

Oliveira

Freitas

Sousa

2012

Archives of Agronomy and Soil Science

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This is an experiment to study the effect of water supply on the quality of the must produced by grapevines, and to determine the water use efficiency (WUE) of different irrigation strategies to give farmers a tool to optimize irrigation, reducing water use with the least negative effect on production. WUE was based on the ratio between a given parameter (yield, different must solubes) and the water used by plant transpiration plus evaporation from soil. The experiment was a completely randomized design with six irrigation treatments (non-irrigated, irrigated from flowering to veraison at rates of 4 and 8 mm day 71 , irrigated from veraison to commercial maturation at rates of 4 and 8 mm day 71 , and irrigated from flowering to commercial maturation at a rate of 8 mm day 71 ) in three replications over three seasons (2004)(2005)(2006). Irrigation significantly increased grapevine yield and, because the plants produced larger berries, there was a dilution of colour, aroma and soluble solids that corresponded to a lower quality of the must. The higher WUE was achieved with no irrigation but yield was very low, albeit with an outstanding quality, that might not be profitable. The best strategy is to balance the water stress of the vines that best combines yield and berry quality and this was achieved by irrigating from flowering to veraison at a rate of *50% of the potential evapotranspiration. This strategy might conserve water, an increasingly scarce resource that we are pressed to use with the utmost efficiency.

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Organic Acids and Sugars in Musts of Irrigated Grapevines in Northeast Portugal

Cited by 8 publications

References 28 publications

Performance of interspecific grapevine varieties in north-east Italy

Performance of interspecific grapevine varieties in north-east Italy

Profiling of primary metabolites in grapes of interspecific grapevine varieties: sugars and organic acids

Water use efficiency and must quality of irrigated grapevines of north-eastern Portugal

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