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Vpliv interaktivnih kvasovk na fizikalno-kemijsko sestavo in kakovost rdečega vina 'Merlot'
David Rustja, 2012, diplomsko delo

Povzetek: Vpliv interaktivnih kvasovk na fizikalno-kemijsko sestavo in kakovost rdečega vina 'Merlot'
Ključne besede: diplomske naloge, vino, Merlot, Vipavska dolina, polifenoli, antociani, proantocianidini, senzorična ocena
Objavljeno v DiRROS: 06.09.2022; Ogledov: 666; Prenosov: 293
URL Povezava na celotno besedilo
Gradivo ima več datotek! Več...

2.
Combined effects of early season leaf removal and climatic conditions on aroma precursors in Sauvignon blanc grapes
Paolo Sivilotti, Branka Škvarč, Lorena Butinar, Melita Sternad Lemut, Klemen Lisjak, Andreja Vanzo, 2017, izvirni znanstveni članek

Povzetek: Early leaf removal around the cluster zone is a common technique applied in cool climate viticulture, to regulate yield components and improve fruit quality. Despite the increasing amount of information on early leaf removal and its impact on total soluble solids, anthocyanins and polyphenols, less is known regarding aroma compounds. In order to verify the hypothesis that defoliation, applied before or after flowering, could impact the biosynthesis of thiol precursors, we performed a two year (2013 and 2014) experiment on Sauvignon blanc. We provided evidence that differential accumulation of thiols precursors in berries is affected by the timing of defoliation and this impact was related to modifications in biosynthetic pathway. Furthermore, the possible interaction between leaf removal treatment and seasonal weather conditions, and its effect on the biosynthesis of volatile precursors are discussed. Our results suggested that in Sauvignon blanc the relative proportion of 4-S-glutathionyl-4-methylpentan-2-one (G-4MSP) and 3-S-glutathionylhexan-1-ol (G-3SH) precursors can be affected by defoliation, and this could be related to the induction of two specific genes encoding glutathione-S-transferases (VvGST3 and VvGST5), while no significant effects on basic fruit chemical parameters, polyphenols and methoxypyrazines were ascertained under our experimental conditions.
Ključne besede: early leaf removal, cluster exposure, thiol precursors, methoxypyrazines, Vitis vinifera
Objavljeno v DiRROS: 06.09.2022; Ogledov: 421; Prenosov: 186
URL Povezava na celotno besedilo

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