The influence of high-energy short-wave radiation and other environmental factors on the genesis of compounds affecting the wine quality in Vitis Vinifera L., c.v. Muller-Thurgau

摘要

In a field experiments during the growing periods 1997 and 1998 with the variety Muller-Thurgau on an experimental site which induces slight and severe stress (water and nitrogen) on the grapevines. They were protected against UV-radiation with plastic film (1197) and an UV absorbing agent (1998) applicated in the grape zone. It was found out that the content of o-aminoacetophenone and skatol increased in wines of the control plots while the indole content Increased in the treated plots. The finding indicate that "environmental stress" can induce the formation of quality reducing substances In wines. Further work is necessary to elucidate the different physiological processes which are involved in plants and the fermentation Process.