The exogenous GA3 treatment had significant effects on water relation in grapevine leaves, alter the positive correlation between cell wall elasticity and relative water content significantly, and have a great impact on the osmotic regulation and changes of apoplastic
water content in the leaves. In the majority of the cultivars, the treatment induced changes in turgor loss point; leaves lost their turgor at higher relative water content and at significantly higher leaf water potential compared to the untreated plants