Search results for "Veraison"

showing 3 items of 13 documents

Effect of leaf removal and ripening stage on the content of quercetin glycosides in Sangiovese grapes

2021

Quercetin haze has been observed over the last few years in some aged Sangiovese wines. This problem could be due to an excess of the quercetin in the wine. Leaf removal increases the exposition of clusters to sunlight, which may enhance flavonol synthesis in the grapes. In this study, we evaluated the dynamics related to extractable flavonols in grapes grown in three usually defoliated Vitis vinifera (L.) cv. Sangiovese vineyards, whose wines showed quercetin precipitates. The particular structure of the vineyards in which the leaf removal experiments were carried out allowed the influence of vineyard, biotype and rootstock on grape flavonol contents at mid-maturation and technological mat…

Winechemistry.chemical_classificationSleaf removal level of maturity quercetin-3-glucuronide quercetin-3-glucoside myricetin-3-glucoside Sangiovese grapes.leaf removal level of maturity rootstock quercetin glycosides myricetin glycosides kaempferol glycosides Sangiovese grapesBotanyGlycosideAgricultureRipeningHorticultureVineyardVeraisonHorticulturechemistry.chemical_compoundFlavonolschemistryQK1-989RootstockQuercetinFood Science
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Phenological model performance to warmer conditions: application to Pinot noir in Burgundy.

2014

<p style="text-align: justify;"><strong>Aim</strong>: The current work aims to assess the performance of two phenological models - a linear model (<em>Grapevine Flowering</em> <em>Véraison</em> model, <em>GFV</em>) and a curvilinear model (<em>Wang and</em> <em>Engel</em> model, <em>WE</em>) - to warmer temperature conditions for the grapevine variety Pinot noir in Burgundy.</p><p style="text-align: justify;"><strong>Methods and results</strong>: Simulations using historical data from the 1973-2005 period were similar between models and consistent with observations. To mimic pot…

[SDV.SA.AGRO]Life Sciences [q-bio]/Agricultural sciences/AgronomyPinot noirClimate changeHorticultureAtmospheric sciencesVeraisonLatitudelcsh:Agriculture[ SDV.SA.AGRO ] Life Sciences [q-bio]/Agricultural sciences/Agronomylcsh:Botanyphenological modelBotanyTemperate climateInhibitory effectMathematicsPhenologylcsh:SLinear modellcsh:QK1-989Plant developmentclimate change13. Climate action[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/ClimatologyVitis vinifera[ SDU.STU.CL ] Sciences of the Universe [physics]/Earth Sciences/ClimatologyBurgundyFood Science
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Characterisation of Bobal and Crujidera grape cultivars, in comparison with Tempranillo and Cabernet Sauvignon: Evolution of leaf macronutrients and …

2008

Abstract We present characterisation data for two Spanish autochthonous grapevines, Bobal and Crujidera, in comparison with the well-known cultivars Tempranillo and Cabernet Sauvignon. Microsatellite markers were used for the molecular characterisation of Crujidera grapevines. Leaf macronutrient contents of the four cultivars were evaluated, as well as their changes at different vine developmental stages, and veraison was seen as the most suitable time to evaluate the nutritional status. Quantitative changes in some physiological parameters and the phenolic composition of the four grape varieties were measured during the last month of ripening. Polyphenols, tannins and anthocyanins increase…

chemistry.chemical_classificationVineRipeningGeneral MedicineBerryBiologyAnalytical ChemistryVeraisonchemistry.chemical_compoundHorticulturechemistryPolyphenolAnthocyaninBotanyTanninCultivarFood ScienceFood Chemistry
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