Therefore, berry size was not the only factor that could influence berry sugar concentration.
Shoot growth rate, mid-day stem water potential, berry size and berry composition were monitored over the season as well as final yield, cluster and pruning weights.
Only in grape variety Merlot, the number of berries per cluster and cluster compactness decreased, while in Cabernet Sauvignon variety, the effect of leaf removal was restrained by berry size [13].
However, in each berry weight category (I: <1 g, II: 1.01 1.25 g, III: 1.26 1.5 g, IV: 1.51 1.75 g, V: 1.76 2 g, VI: >2.01 g) there was a higher sugar concentration at the water stressed vineyard irrespective of berry size.
Leaf removal decreased the yield per vine and cluster weight in Merlot and Sangiovese, while the berry size was unaffected in both varieties.
The double sigmoidal pattern of berry development begins with a first growth phase characterized by berry size increases due to frequent cell division and subsequent cell expansion.
In stage 1, berry size increases sigmoidally.
Bunch size (without the peduncle), bunch density, berry size, berry shape, berry presence of seeds, berry skin color (without bloom) were recorded.
Unfortunately, berry size was not measured in that study [ 26].
Water deficit reduced berry size significantly (Table 1).
