Application of Methyl Jasmonate and Methyl Jasmonate + Urea in Tempranillo Vines: Influence on Grape Phenolic Compounds

• DOI: 10.5344/ajev.2022.22026
• Publication Date: 2022-10-31T12:26:37Z
• Authors: Teresa Garde-Cerdán; Miriam González-L...; Itziar Sáenz de U...; Sandra Marín-San ...; Elisa Baroja; Pilar Rubio-Bretón; Eva P. Pérez-Álvarez
• Keywords: Methyl jasmonate; Flavonols

<h3>Background and goals</h3> The aim of this work was to study, for the first time, influence foliar application methyl jasmonate (MeJ) plus urea (MeJ+Ur) on Tempranillo grape phenolic composition over two seasons. <h3>Methods key findings</h3> This examined compounds using high-performance liquid chromatography-diode array detection. In 2019, both treatments increased total anthocyanins, but MeJ+Ur treatment had a stronger effect than MeJ treatment. decreased flavonols, flavanols, hydroxycinnamic acids in grapes, while significantly did not affect flavanols or acids. Neither affected stilbenes. However, 2020, different: acids, stilbenes, flavanol content grapes. <h3>Conclusions significance</h3> season-dependent, which can be explained by differences preharvest rainfall between vintages. season greater that treatments. results offer information about response grapevine under different climate conditions.