Grapevine Phenology of White Cultivars in Rueda Designation of Origin (Spain) in Response to Weather Conditions and Potential Shifts under Warmer Climate

Grapevines are among the crops that could suffer stronger effects under climate change, although effect can differ based on cultivars and location. The aim of this work was to analyse phenological response Verdejo variety compared other two white varieties (Viura Sauvignon Blanc) cultivated in Rueda Designation Origin (DO), Spain, present conditions, their potential shifts projected change scenarios. Phenological dates referring budbreak, flowering, véraison harvest were analyzed for period 2008–2021 13 plots, together with weather conditions at daily time scale recorded during same period. chill heat units evaluated determine starting date accumulation, as well base temperature reach each stage. influence (maximum minimum) water availability averaged different periods between events evaluated, information used project changes phenology by 2050 2070 Representative Concentration Pathway (RCP) scenarios: RCP4.5 RCP8.5. An advance all projected, particular ripening. slightly higher than Blanc, and, any case, ripening will happen warmer conditions. By 2050, flowering be advanced seven nine days, depending emission scenario. However, about or 14 days scenario 16 19 RCP8.5 Ripening reached up 20 25 earlier, respectively, scenarios, 29 earlier 2070. These projections may imply further impacts grapes wines aforementioned associated