Effects of extreme bud load and leaf removal treatments on leaf water potential, stomatal conductance and ripening of ‘Sultana’ (Vitis vinifera L.)

This study was conducted to determine the effects of three different bud load levels (15 buds, 25 buds and 30 buds m-2) and two different leaf removal (25% and 50% on each vine shoot) treatments on number of bursted bud, midday leaf water potential (?mid), stomatal conductance (gs), total soluble solids (TSS) and titratable acidity (TA) of own-rooted ‘Sultana Seedless’ (Vitis vinifera L.) in 2016 and 2017 vegetation season in Alaşehir, Turkey. Vine spacing was 3.0 to 2.0 m and the vines were cane pruned on Y type trellis system. Leaf removal treatments were performed only once approximately one month before veraison. In this research, berries were sampled separately from upper and lower sides of the cluster. Then values were analyzed separately (P