The accumulation of pollutants on the plant surface is a contributing factor to the
forest decline. Phosphatase is thought to be directly related to the level of organic
phosphorous in the soil. Phosphatases are also produced by ectomycorrhizal fungi. Root
surface phosphatase activity has its relationship with mycorrhizal association and p-
uptake. Investigation was carried out to study the toxicity of heavy metals on
phosphatase activity of mycorhizospheric pine seedlings.