Forcing vine regrowth under different irrigation strategies: effect on polyphenolic composition and chromatic characteristics of cv. Tempranillo wines grown in a semiarid climate

• DOI: 10.3389/fpls.2023.1128174
• Publication Date: 2023-05-10T06:04:23Z
• Authors: Nieves Lavado Rodas; David Uriarte Her...; Daniel Moreno Car...; Luis A. Mancha Ra...; María Henar Priet...; María Esperanza V...
• Keywords: Vineyard; Pruning; Vine; Growing season; Wine color; Forcing (mathematics)

One of the effects climate change in warm areas is asynchrony between dates technological and phenolic maturity grapes. This important because quality color stability red wines are directly related to content distribution compounds. A novel alternative that has been proposed delay grape ripening make it coincide with a seasonal period more favorable for formation compounds crop forcing. consists severe green pruning after flowering, when buds following year have already differentiated. In this way, formed during same season forced sprout, initiating new delayed cycle. The aim present work study effect on composition elaborated from vines fully irrigated (C), grown using conventional non-forcing (NF) forcing (F) techniques (C-NF C-F), subjected regulated irrigation (RI), NF F (RI-NF RI-F). trial was carried out an experimental vineyard Tempranillo variety located semi-arid area (Badajoz, Spain) 2017-2019 seasons. (four by treatment) were stabilized according classic methodologies wine. All had alcohol content, malolactic fermentation not any them. Anthocyanin profiles analyzed HPLC, total polyphenolic anthocyanin catechin contribution due co-pigmented anthocyanins, various chromatic parameters also determined. Although significant found almost all analyzed, general increasing trend most profile differ C wines, especially delphinidin, cyanidin, petunidin, peonidin content. These results indicate technique possible increase ensuring synthesis accumulation these substances occurred at suitable temperatures.