Journal article

Publication year: 2004

Pages: 157-162

Journal: Vitis // Herausgegeben Im Auftrage der Bundesforschungsanstalt FÜr RebenzÜchtung Geilweilerhof

Volume number: 43

Issue number: 4

ISSN: 0042-7500

URL: https://ojs.openagrar.de/index.php/VITIS/article/view/4367

Publisher: Institut Fuer Rebenzuechtung Geilweilerhof der

Abstract: 
The compound responsible for UTA (untypical ageing off-flavour) in wines is o-AAP (o-amino, acetophenone). It is formed from IAA (indole-3-acetic acid), triggered by sulfurylation. The aim of this, study was to evaluate the effect of different N fertilizer supply on this precursor in must and wine, making use of a long-term nitrogen fertilization experiment. Trp (Tryptophan) as well as free and conjugated IA were determined in musts and wines produced from grapevines supplied with 0, 30,60,90 or 150 kg N ha(-1) year. IAA concentrations in musts and wines varied highly over years (1994-1999), wines containing about half of the total IAA of musts. The IAA concentration in must was positively correlated with the concentration of amino acids in must, however, nitrogen supply did not have any effect, neither on Trp nor on IAA concentrations.

Harvard Citation style: Linsenmeier, A., Löhnertz, O. and Schubert, S. (2004) Effect of different N fertilization of vine on the tryptophan, free and total indole-3-acetic acid concentrations, Vitis // Herausgegeben Im Auftrage der Bundesforschungsanstalt FÜr RebenzÜchtung Geilweilerhof, 43(4), pp. 157-162. https://ojs.openagrar.de/index.php/VITIS/article/view/4367

APA Citation style: Linsenmeier, A., Löhnertz, O., & Schubert, S. (2004). Effect of different N fertilization of vine on the tryptophan, free and total indole-3-acetic acid concentrations. Vitis // Herausgegeben Im Auftrage der Bundesforschungsanstalt FÜr RebenzÜchtung Geilweilerhof. 43(4), 157-162. https://ojs.openagrar.de/index.php/VITIS/article/view/4367