RT journal article
T1 Impact of Foliar Application of Winemaking By-Product Extracts in Tempranillo Grapes Grown Under Warm Climate: First Results
A1 Piñeiro, Zulema
A1 Gutierrez Escobar, Rocío
A1 Aliaño González, María José
A1 Fernández-Marín, María Isabel
A1 Jiménez Hierro, María Jesús
A1 Cretazzo, E.
A1 Rodríguez-Torres, I.C.
A2 Química Analítica
K1 plant extracts
K1 red wine
K1 stems
K1 pomaces
K1 wine lees
K1 colour characteristics
AB The Tempranillo grape variety is the most widely cultivated red grape cultivar inSpain. However, it has been observed that this variety may not always exhibit the optimalcolour properties in warm climates such as Andalusia (southern Spain). Several strategieshave been proposed to enhance productivity and resilience to stress or improve the qualityof both grapes and wines. The foliar application of agricultural plant extracts has beenidentified as a highly effective method of promoting the synthesis of secondary metabolitesin the grapevine. The objective of the current research was to analyse the incidence of foliarapplication of different extracts from winemaking by-products (grape stems: GS, grapepomaces: GP and wine lees: WL) on Tempranillo grapevine leaves, studying the impact onthe quality of the resulting wines. The oenological and colour characteristics of the wineswere assessed to evaluate the impact of these extracts on wines during the winemakingprocess. The detailed composition of the wines revealed that GS and WL extracts led tosignificant differences in wine colour properties. Wines derived from grapes treated withboth extracts exhibited heightened colour intensity, accompanied by discernible alterationsin CIELab coordinates, with lower L* and higher a* and C*ab values in comparison to CT.These results are encouraging, and the foliar application of GS extracts at veraison appearsto be a feasible alternative to enhance the colour of wines from red grape cultivars withcolour difficulties in warm climates.
PB MDPI
SN 2306-5710
YR 2025
FD 2025-04-28
LK http://hdl.handle.net/10498/38637
UL http://hdl.handle.net/10498/38637
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 07-nov-2026