RT Journal Article
SR Electronic
T1 Effect of Foliar Applications of Proline, Phenylalanine, Urea, and Commercial Nitrogen Fertilizers on Stilbene Concentrations in Tempranillo Musts and Wines
JF American Journal of Enology and Viticulture
JO Am. J. Enol. Vitic.
FD American Society for Enology and Viticulture
SP 542
OP 547
DO 10.5344/ajev.2015.14128
VO 66
IS 4
A1 Garde-Cerdán, Teresa
A1 Portu, Javier
A1 López, Rosa
A1 Santamaría, Pilar
YR 2015
UL http://www.ajevonline.org/content/66/4/542.abstract
AB Resveratrol-enriched wine is considered a product with added value because of the numerous health-promoting properties of this compound. The purpose of this study was to determine the effect of foliar nitrogen application on stilbene concentrations of Tempranillo musts and wines. The nitrogen sources applied were proline, phenylalanine, urea, and two commercial fertilizers, one with and one without amino acids. Grapevines were sprayed at veraison and one week later. There was a good correlation between stilbene concentrations in wine and must, and the concentrations were higher in wine. Treatment with urea favored resveratrol and piceid synthesis by increasing stilbene concentrations in must and wine. Wines from vines treated with phenylalanine had higher concentrations of trans-piceid compared to control wines. However, treatment with proline and commercial nitrogen fertilizers did not affect stilbene concentrations in must and wine samples. Our findings indicate that foliar application of phenylalanine and urea in vineyards could be used to stimulate stilbene synthesis and thus to obtain musts and wines with better health-promoting properties.