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Water stress and ripeness effects on the volatile composition of Cabernet Sauvignon wines
Author(s) -
Talaverano Inmaculada,
Ubeda Cristina,
CáceresMella Alejandro,
Valdés María Esperanza,
Pastenes Claudio,
PeñaNeira Álvaro
Publication year - 2018
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.8565
Subject(s) - ripeness , aroma , chemistry , ripening , composition (language) , berry , wine , sugar , aroma of wine , food science , irrigation , solid phase microextraction , chemical composition , deficit irrigation , horticulture , gas chromatography–mass spectrometry , agronomy , mass spectrometry , chromatography , irrigation management , organic chemistry , biology , linguistics , philosophy
BACKGROUND Controlled water deficits affect grape berry physiology and the resulting wines, with volatile composition being the one of the affected parameters. However, there is a potential disconnect between aromatic maturity and sugar accumulation. Accordingly, the effects of three different water status levels over two growing seasons (2014 and 2015) and two different harvest dates on the aroma compounds from Cabernet Sauvignon wines were studied. Volatile compounds were determined using headspace solid phase microextraction coupled with gas chromatoghraphy/mass spectrometry. RESULTS Around 45 volatile compounds were determined in the wines and, among these, esters were affected the most, presenting lower concentrations when the most restrictive water treatment was applied in both years. By contrast, volatile acids presented the highest concentrations when the lowest level of irrigation was applied. On the other hand, a delay in harvesting produced an increase in the total amount of volatile compounds in samples from the most restrictive water treatment. These results are coincident with a principal component analysis that indicated a great separation between years, deficit irrigation treatments and harvest dates. CONCLUSION The results of the present study suggest that a low water supply had a negative effect on the aromatic potential of wines at a similar ripening stage. However, this effect could be countered by harvesting at a later date. © 2017 Society of Chemical Industry