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Chemical composition of cool-climate Sauvignon blanc grape skins clones during ripening

AIM: Sauvignon blanc is the most important variety in cool valleys in central Chile accounting 15,522 ha which corresponds to 42.4% of the cultivated surface with white varieties in Chile (SAG, 2019). Casablanca Valley, one of the most important area for the production of white wines in Chile is located approximately to 35-40 km from […]

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Development of a new indicator of grape skin ripening in relation to Botrytis cinerea susceptibility

The bunch rot induced by Botrytis cinerea is an important disease of grapevine that causes a diminution of grape quality and a considerable yield loss leading to an economic loss. Currently, the most common methods to control this rot are canopy management and the use of fungicides, which has harmful effect on the environment and […]

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Effect of grape harvest time on the metabolomic profile of ribolla gialla monovarietal sparkling wines

AIM: The timing of grape harvest is crucial factor to be considered in the winemaking process, as delayed harvest increases the content of varietal aromas, esters, aldehydes, and alcohols, while concentration of green odor related compounds decreases [1,2]. In order to target optimal grape ripeness and maximize positive attributes of Ribolla Gialla sparkling wine, an […]

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Evaluation of glutathione content in four white varieties in the d.o. Ca. Rioja (Spain)

AIM: Glutathione is a tripeptide that is mainly found in reduced form in grapes. It generates during the maturation of the grape, increasing significantly after veraison [1]. It plays a relevant role in the prevention of oxidative processes due to its high antioxidant activity. Its content in the grape is influenced by many factors (variety, […]

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Grape texture characteristics are linked to one major qtl

AIM: Berry texture and berry skin mechanical properties have high agronomic importance, related to quality and marketing requirements of wine, table and raisin grapes. Despite the efforts already made to detect molecular markers and candidate genes associated with berry texture, different QTLs were proposed until now, showing low contribution rates to the trait, likely due […]

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Within-vineyard spatial variation impacts methoxypyrazine accumulation in the rachis of Cabernet-Sauvignon

AIM: To investigate the impact of spatial variation in vine vigour on the accumulation of methoxypyrazines in the rachis of Cabernet-Sauvignon. Cabernet-Sauvignon rachis has been shown to contain significantly higher concentrations of 3-isobutyl-2-methoxypyrazine (IBMP) than that found in berry material. IBMP is readily extracted from rachis during fermentation and can impact the flavour profile of […]

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Effect of application of kaolin and pinolene on grape berry cell death, berry shrinkage, and ethanol accumulation

AIM: Cell death in Vitis vinifera L. berries late in ripening and berry shrinkage (loss of mass) can decrease yield and reduce grape quality in cultivars such as Cabernet Sauvignon, Merlot, and especially Shiraz. Techniques to ameliorate effects of cell death and berry shrinkage are limited. Pinolene and kaolin are two types of film-forming antitranspirants […]

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Characterization of 25 white grape varieties from the variety collection of ICVV (D.O.Ca.Rioja, Spain)

AIM: The effects of climate change produce an increase in sugar concentration and a decrease in acidity, without reaching the optimum grape phenolic maturity [1]. The aim of this work was to characterize 25 white grape varieties to find new strategies to fight against climate change. METHODS: The Variety Collecction that belongs to Instituto de […]

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Investigations into the effects of a commercial organic fertilizer and of quality compost on the soil and the vines

The influences of quality compost A+ and of a commercial organic fertilizer based on dry mash from bioethanol production, blackstrap molasses, vinasse, PNC (potato nitrogen concentrate) and CSL (corn steep liquor) on the humus content, on the mineral nitrogen content in the soil, in the must and in the vine leaves, on pruning wood weight […]

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Elicitors application in two maturation stages of Vitis vinifera L. cv Monastrell: changes on the skin cell walls

AIM: In a recent study, it was determined that the mid-ripening period is the most suitable for the application of methyl jasmonate (MeJ), benzothiadiazole BTH and MeJ+BTH on Monastrell grapes, to favor maximum accumulation of phenolic compounds at the time of harvest. However, the increase in the anthocyanin content of grapes was not reflected in […]

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