Abstract: Effect of three pot sizes (i. e. 10 , 20 and 50 L) on the growth of wine grape cv. Carbenet Sauvignon was
studied with sand culture. Root growth was positively correlated with pot size. Root dry weight of 50 L pot was 1. 78 and
3. 38 - fold as that of 20 L and 10 L pots , respectively. Roots with different diameters were classified into three groups
as coarse roots (d > 3 mm) , medium roots (d = 0. 5 - 3. 0 mm) and fine roots (d < 0. 5 mm) . Root restriction could
change the composition of coarse , medium and fine roots in the whole root system. Root restriction resulted in more fine
roots and less medium roots. Growth above ground was also affected negatively by root restriction. Leaf and shoot dry
weight , leaf area , photosynthesis decreased significantly with root restriction.

Key words: Grape, Root, Root restriction, Growth