Antimony (Sb) pollution has increased in recent years because of human activities and extensive usage of antimony compounds. Only a few researches have been conducted in this field in Iran. The purpose of this research, is to determine the plant uptake of Sb was affected by phosphorous and salinity. This greenhouse research was performed in hydroponics. A factorial experiment (3 × 2 × 3) with three Sb concentrations, with and without P and three concentrations of NaCl in three replications was conducted. After 40 days, plants were harvested and the roots and shoots were separated. The concentrations of Sb, Fe and Zn and root permeability were measured. Increasing Sb concentrations, significantly reduced shoot weight. In the presence of Sb, shoot wet matter increased with phosphorous addition because of the positive effect of phosphorous. Increasing Sb concentration, in the same level phosphorous, plant with less dry matter were observed. Antimony concentration in the plant shoots increased with increase in the salinity of the nutrient solution. Increasing Sb concentration in nutrient solution, resulted in its enhancement in plant, too. But phosphorous had no significant effect on shoot Sb concentration. There was no significant difference in Fe concentration between species in nutrient solutions with high Sb concentration. The addition of Sb, also increased shoot Fe concentration from 55 to 74 mg L -1 . Root Fe concentration of blank phosphorous level was about 13 percent higher than 3 mg L -1 of phosphorous. Increase in salinity resulted in higher Zn concentration in shoots. Roots with lower phosphorous level, have higher permeability and increasing phosphorous concentration had significant effect on root permeability. The highest and lowest root permeability was related to blank Sb level and 6 mg L -1 level of Sb, respectively. Increase of Sb concentration in nutrient solution, first reduced and then increased root permeability. Root permeability also increased significantly with increasing salinity level in nutrient solution. Key Words Antimony, Phosphorous, Salinity, Root permeability
