| Title: | "Impact of Rootstock, Clonal Selection, and Berry Size of Vitis vinifera sp. Riesling on the Formation of TDN, Vitispiranes, and Other Volatile Compounds" |
| Author(s): | Ziegler M; Wegmann-Herr P; Schmarr HG; Gok R; Winterhalter P; Fischer U; |
| Address: | "Dienstleistungszentrum Landlicher Raum (DLR) Rheinpfalz, Institute for Viticulture and Oenology, Breitenweg 71, Neustadt an der Weinstrasse 67435, Germany. Department of Chemistry, Kaiserslautern University of Technology, Erwin-Schrodinger-Strasse 52, Kaiserslautern 67663, Germany. Faculty for Chemistry, Instrumental Analytical Chemistry, University Duisburg-Essen, Universitatsstrasse 5, Essen 45141, Germany. Technische Universitat Braunschweig, Institute of Food Chemistry, Schleinitzstrasse 20, Braunschweig 38106, Germany" |
| ISSN/ISBN: | 1520-5118 (Electronic) 0021-8561 (Linking) |
| Abstract: | "The C(13)-norisoprenoid aroma compounds 1,1,6-trimethyl-1,2-dihydronaphthalene (TDN) and biosynthetically related vitispirane (VS) are important contributors to the varietal aroma of Riesling wines and are released from glycosidically bound carotenoid breakdown products during bottle aging. TDN is appreciated by numerous winemakers, particularly in aged Riesling wines. Higher levels of TDN, however, are perceived as a 'petrol' off-flavor, which is expected to increase due to ongoing climate change. Wines produced from the same Riesling clone, which was grafted on six different rootstocks, varied significantly throughout two vintages in respect to their concentrations of free and bound TDN and VS as well as other volatiles. Over three vintages, the same compounds differed significantly among wines made from eight Riesling clones grafted on the same rootstock. Genetically determined loose grape clusters favored the formation of TDN and yielded wines of stronger sensory petrol intensity. Berry size, however, had no relevant impact on TDN and VS formation" |
| Keywords: | Fruit/*chemistry Naphthalenes/*analysis Odorants/analysis Vitis/*chemistry Volatile Organic Compounds/analysis Wine/*analysis Riesling Tdn clones precursor rootstock volatiles wine; |
| Notes: | "MedlineZiegler, Michael Wegmann-Herr, Pascal Schmarr, Hans-Georg Gok, Recep Winterhalter, Peter Fischer, Ulrich eng 2020/02/08 J Agric Food Chem. 2020 Mar 25; 68(12):3834-3849. doi: 10.1021/acs.jafc.0c00049. Epub 2020 Mar 16" |
