2026-04-17T03:09:15Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/3519392026-01-21T04:02:36Zcom_2072_1033col_2072_452950

00925njm 22002777a 4500 dc Pérez Álvarez, Eva P. author Intrigliolo, Diego S. author Almajano Pablos, María Pilar author Rubio Bretón, Pilar author Garde Cerdán, Teresa author 2021-08-01 The high phenolic compound content of grapes makes them an important source of natural antioxidants, among other beneficial health properties. Vineyard irrigation might affect berry composition and quality. Regulated deficit irrigation (RDI) is a widely used strategy to reduce the possible negative impact of irrigation on grapes, improving grape composition and resulting in water savings. Monastrell grapevines (Vitis vinifera L.) grown in eastern Spain were subjected to two water regime strategies: rainfed (non-irrigation) and RDI. The content of anthocyanins, flavonols, flavanols, hydroxybenzoic and hydroxycinnamic acids, and stilbenes was determined by HPLC and was related with total phenolic content and three antioxidant activity methods (ABTS, DPPH, and ORAC). The study aimed to evaluate and compare the phenolic composition and antioxidant potential of Monastrell grapes. The rainfed regime concentrated grapes in terms of phenolic compounds. Thus, total content of anthocyanins, flavonols, flavanols, hydroxybenzoic acids, and total phenols were higher in the rainfed grapes than in the RDI ones. Besides, the rainfed grapes doubled their antioxidant potential with respect to the RDI grapes with the ORAC method. Total phenolic content and antioxidant activity by ORAC assay positively correlated with most of the total phenolic compounds analyzed. This study demonstrates how field practices can modulate final grape composition in relation to their antioxidant activity. Peer Reviewed Postprint (published version) Àrees temàtiques de la UPC::Enginyeria química Antioxidants Grapes Phenolic compounds Antioxidant capacity Regulated deficit irrigation ABTS DPPH ORAC Anthocyanins Flavonols Flavanols Non-flavonoids Antioxidants Raïms Effects of water deficit irrigation on phenolic composition and antioxidant activity of monastrell grapes under semiarid conditions