| Title: | Effects of Defoliation Treatments of Babica Grape Variety(Vitis vinifera L.) on Volatile Compounds Content in Wine |
| Author(s): | Kujundzic T; Rastija V; Subaric D; Jukic V; Schwander F; Drenjancevic M; |
| Address: | "Faculty of Agrobiotechnical Sciences Osijek, Josip Juraj Strossmayer University of Osijek, Vladimira Preloga 1, 31000 Osijek, Croatia. Julius Kuhn-Institut, Federal Research Centre of Cultivated Plants, Institute for Grapevine Breeding Geilweilerhof, 76833 Siebeldingen, Germany" |
| DOI: | 10.3390/molecules27030714 |
| ISSN/ISBN: | 1420-3049 (Electronic) 1420-3049 (Linking) |
| Abstract: | "The aim of this study was to determine the effects of defoliation performed in the Babica red grape variety on the volatile compounds in produced wine. Three treatments were performed during 2017 and 2018: the removal of six leaves before flowering (FL) and at the end of veraison (VER), as well as control (C). Volatile compounds were analyzed using a gas chromatograph coupled to a mass spectrophotometric detector. Results were statistically evaluated by analysis of variance (ANOVA at the p = 0.05 level) and principal component analysis (PCA). Defoliation treatments were affected by the concentration of several compounds, but only in one year. The VER2017 treatment significantly increased the concentration of three aliphatic esters up to 8 C atoms and octanoic acid ethyl ester. The FL2017 treatment increased the concentration of three aliphatic alcohols. The FL2018 treatment has significantly enhanced the concentration ethyl cinnamate but decreased the concentrations of eugenol and dihydro-2-methyl-3(2H)-thiophenone. Both defoliation treatments reduced the concentration of gamma-decanolactone in 2017. Aldehydes, monoterpenoles, and monoterpenes remained unaffected by the defoliation treatments. Vintage was found to be the largest source of variability for most volatile compounds under investigation, which was confirmed by PCA. The effect of defoliation in the mild-Mediterranean climate was found to mostly depend on seasonal weather conditions" |
| Keywords: | "Chromatography, Gas/methods Climate Defoliants, Chemical/*adverse effects Fruit/chemistry Odorants/analysis Plant Leaves/chemistry Principal Component Analysis Vitis/*chemistry/*metabolism Volatile Organic Compounds/*analysis/chemistry Weather Wine/analys;" |
| Notes: | "MedlineKujundzic, Toni Rastija, Vesna Subaric, Domagoj Jukic, Vladimir Schwander, Florian Drenjancevic, Mato eng Switzerland 2022/02/16 Molecules. 2022 Jan 21; 27(3):714. doi: 10.3390/molecules27030714" |
