title: Improvement of grape and wine phenolic content by foliar application to grapevine of three different elicitors: Methyl jasmonate, chitosan, and yeast extract.
abstract: Phenolic compounds play a key role in grape and wine organoleptic properties, being therefore a key parameter in wine quality. Elicitor application constitutes an interesting field of research since it is indirectly involved in the accumulation of phenolic compounds. The aim of this study was to compare the effect of the application of three different elicitors on both grape and wine phenolic content. Methyl jasmonate, chitosan, and a commercial yeast extract were applied to the canopy at veraison and one week later. Results showed that foliar treatments carried out with methyl jasmonate and yeast extract achieved the best results, increasing grape and wine anthocyanin content when compared to the control. Moreover, the application of the yeast elicitor also enhanced grape stilbene content. In contrast, the chitosan treatment did not have a substantial impact on the phenolic compounds. The results of this study indicate that methyl jasmonate and yeast extract applications could be a simple practice to increase grape and wine phenolic content.
authors: Instituto de Ciencias de la Vid y del Vino (Gobierno de La Rioja-CSIC-Universidad de La Rioja), Carretera de Burgos Km. 6, Finca La Grajera, 26007 Logroño, Spain.
authors: Javier
authors: J
authors: Portu
authors: Instituto de Ciencias de la Vid y del Vino (Gobierno de La Rioja-CSIC-Universidad de La Rioja), Carretera de Burgos Km. 6, Finca La Grajera, 26007 Logroño, Spain.
authors: Rosa
authors: R
authors: López
authors: Instituto de Ciencias de la Vid y del Vino (Gobierno de La Rioja-CSIC-Universidad de La Rioja), Carretera de Burgos Km. 6, Finca La Grajera, 26007 Logroño, Spain.
authors: Elisa
authors: E
authors: Baroja
authors: Instituto de Ciencias de la Vid y del Vino (Gobierno de La Rioja-CSIC-Universidad de La Rioja), Carretera de Burgos Km. 6, Finca La Grajera, 26007 Logroño, Spain.
authors: Pilar
authors: P
authors: Santamaría
authors: Instituto de Ciencias de la Vid y del Vino (Gobierno de La Rioja-CSIC-Universidad de La Rioja), Carretera de Burgos Km. 6, Finca La Grajera, 26007 Logroño, Spain. Electronic address: Teresa.GardeCerdan@gmail.com.
authors: Teresa
authors: T
authors: Garde-Cerdán
mesh_terms: D000085:Acetates / Q000494:pharmacology*; D000872:Anthocyanins / Q000032:analysis; D048271:Chitosan / Q000494:pharmacology*; D003517:Cyclopentanes / Q000494:pharmacology*; D054883:Oxylipins / Q000494:pharmacology*; D010636:Phenols / Q000032:analysis*; D012441:Saccharomyces cerevisiae; D027843:Vitis / Q000737:chemistry*; D014920:Wine / Q000032:analysis*
chemical_list: D000085:Acetates; D000872:Anthocyanins; D003517:Cyclopentanes; D054883:Oxylipins; D010636:Phenols; C072239:methyl jasmonate; D048271:Chitosan
keywords: Anthocyanins; Chitosan; Flavonols; Foliar application; Methyl jasmonate; Non-flavonoid; Tempranillo; Vitis vinifera L.; Yeast extract