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Najdeno v: osebi
Ključne besede: tarčna metabolomika, Modri pinot, razlistanje, polifenoli, vinska trta
Objavljeno: 05.08.2014; Ogledov: 3258; Prenosov: 36
Polno besedilo (0,00 KB)

Najdeno v: osebi
Ključne besede: vinska trta, vino, antioksidacija, fenolne spojine
Objavljeno: 09.05.2017; Ogledov: 2129; Prenosov: 6
Polno besedilo (0,00 KB)

Najdeno v: osebi
Ključne besede: Zelen (Vitis vinifera L.), targeted metabolomics, wine aroma, sensory evaluation, alternative vinification procedures
Objavljeno: 18.04.2017; Ogledov: 2199; Prenosov: 0
Polno besedilo (841,25 KB)

Najdeno v: osebi
Ključne besede: odstajevanju listov v predelu grozdov, trajnostno vinogradništvo, Botrytis cinerea, mikrobna ekologija vinske trte, alternativne vinarske tehnologije, senzorika vina.
Objavljeno: 29.06.2017; Ogledov: 2001; Prenosov: 125
Polno besedilo (15,95 KB)

Opis: The growing demand of consumers for environment-friendly and safe food products already forced many winemakers to restrict the application of synthetic fungicides to earlier season, trying to reduce the risk of residues being detected in wines. Main risk for infection by B. cinerea, however, occurs later in the season. To support an improvement in whole-season B. cinerea green care, the potential of yeasts as biocontrol agent (PBA) was studied. Selected yeasts were tested for their antifungal activities. Furthermore, a field experiment in Pinot noir and Pinot gris vineyards was designed to study different combinations of optimized canopy microclimate manipulation (CMM) techniques and PBA application. In experimental conditions, PBA's ability to maintain appropriate population density for disease prevention was observed. Grape and wine quality parameters were evaluated. Analytical approach of metabolomics was applied to upgrade the understanding of potentially induced changes in plant metabolism. Based on yeasts testing results, biocontrol yeast P. guilliermondii ZIM 624 was selected and after its field application, we were able to detect its suitable density on grapes until harvest. In case of early defoliation for both varieties smaller grape compactness was confirmed together with lower yield. Among grape basic quality parameters, optimized techniques showed positive effect on sugar content, but unexpectedly, in the treatments with biocontrol yeasts the trends toward higher acidity were noticed in Pinot gris. CMM and PBA introduction indicated some effects on grapevine biosynthetic behaviour but the differences in content of these metabolites compared to control were poorly detected in final wines with exception of mainly some flavonols, stilbenes and flavan-3-ols (and consequently total phenolic content).
Najdeno v: osebi
Ključne besede: sustainable viticulture, Botrytis cinerea, yeasts, biocontrol, canopy microclimate manipulation, metabolomics, grapevine metabolites
Objavljeno: 28.02.2020; Ogledov: 760; Prenosov: 0
Polno besedilo (7,85 MB)