Resumen: This study investigates the impact of pre- and post-veraison deficit irrigation under elevated
temperatures in berry skin metabolites from two Tempranillo clones. The study was carried
out on fruit-bearing cuttings from two clones of Vitis vinifera (L.) cv. Tempranillo (CL-1089
and CL-843) subjected to two temperature regimes (24/14°C and 28/18°C (day/night))
combined with three irrigation regimes during berry ripening. Irrigation treatments were: (i)
water deficit from fruit set to onset of veraison (early deficit, ED); (ii) water deficit from onset
of veraison to maturity (late deficit, LD); and (iii) fully irrigation (FI). Results showed that at
24/14°C, LD treatment performed better than ED treatment but such differences were
attenuated at 28/18°C. Berry primary metabolism was mainly altered by temperature
whereas secondary metabolism was more modified by water deficit irrigation, being CL-843
more sensitive to high temperature than CL-1089. Thereby, our data suggest that the
adaptation of grapevines for climate change in south Mediterranean Europe might be
plausible with the optimization of timing of water deficit and the adequate clonal selection.