Influences of sulfur (S) on the accumulation and detoxification of arsenic (As) in Vallisneria natans (Lour.) Hara, an arsenic hyperaccumulating submerged aquatic plant, were investigated. At low sulfur levels (<20 mg/L), the thiols and As concentrations in the plant increased significantly with increasing sulfate nutrient supply. If sulfur levels were above 20 mg/L, the thiols and As concentrations in the plant did not increase further. There was a significant positive correlation between thiols and As in the plant. As(III) is the main form (>75%) present in the plant after exposure to As(V). Sulfur plays an important role in the arsenic translocation and detoxification, possibly through stimulating the synthesis of thiols and complexation of arsenite-phytochelatins. This suggests that addition of sulfur to the arsenic-contaminated water may provide a way to promote arsenic bioaccumulation in plants for phytoremediation of arsenic pollution.
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This work was supported by the Natural Science Foundation of China (Nos. 41501343, 31671635, 31400374 and 51408214), Scientific Research Foundation of Hunan Provincial Education Department (Nos. 14B066 and 15C0534).
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Chen, G., Feng, T., Li, Z. et al. Influence of Sulfur on the Arsenic Phytoremediation Using Vallisneria natans (Lour.) Hara. Bull Environ Contam Toxicol 99, 411–414 (2017). https://doi.org/10.1007/s00128-017-2135-1
- Submerged plant