Response of four olive (Olea europaea L.) cultivars to six B concentrations: Growth performance, nutrient status and gas exchange parameters

▶ Boron excess led to a decline in vegetative growth. ▶ High B supply increased the B concentrations in leaves and stems. ▶ The increase of B concentration in nutrient solution negatively affected N concentration in leaves and stems. ▶ In plants treated with high B the photosynthetic rate was decreased.