1. Combined effects of early season leaf removal and climatic conditions on aroma precursors in Sauvignon blanc grapesPaolo Sivilotti, Branka Škvarč, Lorena Butinar, Melita Sternad Lemut, Klemen Lisjak, Andreja Vanzo, 2017, original scientific article Abstract: 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. Keywords: early leaf removal, cluster exposure, thiol precursors, methoxypyrazines, Vitis vinifera Published in DiRROS: 06.09.2022; Views: 454; Downloads: 197 Link to full text |
2. Poročilo o preskusu št.: LVG 2019-106 : opis vzorca: 11131748: Vitis vinifera, drugo, 11131939: Vitis vinifera, drugo, 11460442: Vitis vinifera, drugo : namen testiranja: sum na: Xylosandrus crassiusculusAndreja Kavčič, 2019, expertise, arbitration decision Keywords: varstvo gozdov, Vitis vinifera, Xylosandrus crassiusculus, žuželke, morfološke analize Published in DiRROS: 10.10.2019; Views: 1686; Downloads: 113 This document has many files! More... |
3. Poročilo o preskusu št.: LVG 2019-101 : opis vzorca: 11131878: Vitis vinifera, drugo, 11460138: Vitis vinifera, drugo, 11460060: Vitis vinifera, drugo : namen testiranja: sum na: Xylosandrus crassiusculusAndreja Kavčič, 2019, expertise, arbitration decision Keywords: varstvo gozdov, Vitis vinifera, Xylosandrus crassiusculus, žuželke, morfološke analize Published in DiRROS: 10.10.2019; Views: 1674; Downloads: 116 This document has many files! More... |
4. Poročilo o preskusu št.: LVG 2019-099 : opis vzorca: 11131731: Vitis vinifera, drugo, 11131922: Vitis vinifera, drugo, 11460459: Vitis vinifera, drugo : namen testiranja: sum na: Xylosandrus crassiusculusAndreja Kavčič, 2019, expertise, arbitration decision Keywords: varstvo gozdov, Vitis vinifera, žuželke, morfološke analize Published in DiRROS: 10.10.2019; Views: 1689; Downloads: 113 This document has many files! More... |
5. Poročilo o preskusu št.: LVG 2019-014 : opis vzorca: Vitis vinifera, les, lubje, sekanci, št. enot 10 : namen testiranja: sum na: Fitofagna žuželkaAndreja Kavčič, 2019, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize, Kmetijsko gozdarski zavod Novo mesto, vinska trta, Vitis vinifera, les, fitofagna žuželka, podlubniki, Xylosandrus germanus Published in DiRROS: 12.04.2019; Views: 2259; Downloads: 146 This document has many files! More... |