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Insights into the stable isotope ratio variability of hybrid grape varieties

The wine industry faces the consumer’s increasing demand for a sustainable and environmentally-friendly production [1]. This demand has been shared and boosted by the European Union within the European Green Deal in the Farm to Fork strategy that aims to reduce a 50% the pesticide utilisation in farming systems. Among the agronomical approaches so far […]

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The effects of canopy side on the chemical composition of merlot, Cabernet-Sauvignon, and Carmenère (Vitis vinifera L.) Grapes during ripening

AIM Evaluating the effects of canopy side on the chemical composition of Merlot, Cabernet-Sauvignon and Carmenère fruit during ripening of a Vertical shoot positioning, VSP, trained experimental vineyard with north-south row orientation. METHODS Cabernet-Sauvignon, Carmenère, and Merlot grapes were harvested from a VSP trained experimental vineyard with north-south row orientation, located in the O’Higgins Region […]

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Oligosaccharides from Vitis vinifera grape seeds: a focus on gentianose as a novel bioactive compound

AIM. Grape seeds (Vitis vinifera) are among the main constituents of grape pomace, also exploited in ingredients for nutraceutics and cosmeceutics, particularly regarding the phenolic fraction. The macromolecules of grape/wine include polyphenols, proteins and polysaccharides. Polysaccharides have been comprehensively studied because of their importance (technological and sensory properties in wines). Unlike polysaccharides, oligosaccharides have only […]

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Effect of soil particle size on vine water status, leaf abscisic acid content and berry quality in nebbiolo grapes

AIM: We investigated the effect of soil texture on grapevine response to water stress, leaf abscisic acid concentration and berry quality, in two adjacent vineyards located in the renewed Cannubi hill of Barolo (Langhe area, CN, North-West Italy). METHODS: The distance as the crow flies between the two Nebbiolo vineyards was about 250 m; cultural […]

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Defoliation timing impacts berry secondary metabolites and sunburn damage

Sunburn is a physiological disorder that leads to yield and quality losses in a range of fruits such as grapes and apples. It affects the visual appearance and the composition of the fruit, leading to irreversible changes and ultimately, cell death in extreme situations. Sunburn is caused by a combination of excessive radiation and temperature […]

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Enological and nutraceutical potential of some grape varieties tolerant to downy mildew and powdery mildew

AIM: Since 2012 the Veneto Region regulation (north-east Italy) allowed wine production using 20 hybrid grapevine varieties selected for their high tolerance to downy mildew and powdery mildew. Characterized by vigour, high grape productivity and low pesticide use, these varieties are suitable to develop sustainable viticulture in mountain areas located at medium altitudes. Project VINIRES […]

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First characterization of thiol precursors in colombard and gros manseng: comparison of two cultivation practices

AIM: Organic production of wine in the past years has known an important augmentation. This type of cultivation practice switches synthetic phytosanitary product for copper-based protection as fungicide. While the effect of copper on soil and vine is understood, few data are published concerning its impact on wine aromas (Darriet et al. 2001) and even […]

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Carbon isotope labeling to detect source-sink relationships in grapevines upon drought stress and re-watering

AIM: Kinetics of carbon allocation in the different plant sinks (root-shoot-fruit) competing in drought stressed and rehydrated grapevines have been investigated. METHODS: A plant growth chamber for stable isotope labeling has been set in an environmental control system, basing on pulse-chasing isotopic strategy to trace carbon phloem flows on potted grapevines.In addition, an open-air plant/soil […]

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Understanding the genetic determinism of phenological and quality traits in ‘Corvina’ grape variety for selection of improved genotypes

Downy and powdery mildew are major issues in grapevine cultivation, requiring many phytosanitary treatments to ensure yield and quality. Climatic changes are also challenging grape cultivation in several areas, leading to anticipation of phenological events and increasing impact of temperature on grape quality. Beside disease resistance, adaptation of varieties to changing climate is thus an […]

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Influence of the agronomic management on the aroma of Riesling wines

Nitrogen fertilisation of grapevines is known to influence not only plant development and production yield, but also yeast assimilable nitrogen (YAN). This parameter is related to the growth of yeast during fermentation and the quality of wines, since nitrogen is involved in the biochemical production of the fermentation aroma. The work compared three agronomic managements […]

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