Toxic effects of perfluorooctane sulfonate (PFOS) on wheat (Triticum aestivum L.) plant.Chemosphere. 2010 Apr; 79(5):555-60.C
Toxic effects of different concentrations (0.1-200mgL(-1)) of perfluorooctane sulfonate (PFOS) on wheat (Triticumaestivum L.) were investigated using the growing and developmental indexes of wheat, including length and biomass of roots and leaves, chlorophyll, soluble protein, peroxidase (POD), superoxide dismutase (SOD) in the seedlings and permeability of root cells. The results showed that PFOS had significant (p<0.05) effects on the growth of wheat seedlings under the experimental conditions. At the low concentration (less than 10mgL(-1)), PFOS could slightly stimulate the growth of wheat seedlings and induce the synthesis of chlorophyll and soluble protein in wheat seedlings, and whereas exceeding 10mgL(-1) PFOS treatment could exert inhibition to the elongation and biomass of roots and leaves, and lead to damage to chlorophyll accumulation and soluble protein synthesis. Furthermore, the activities of SOD and POD in wheat roots and leaves were enhanced in the tested PFOS concentrations of 0.1-10mgL(-1). However, when the concentration of PFOS was raised up to 200mgL(-1), the activity of SOD and POD decreased significantly with 12.6% and 33.7% inhibition for roots compared to the control respectively, which indicated the antioxidative defensive system in wheat seedlings might be damaged by PFOS. In addition, the permeability of wheat root cells was enhanced at the tested concentration of 0.1-200mgL(-1). When the concentration was increased to 200mgL(-1), the electrolyte leakage was promoted 2.73 times higher than in the control.