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- W2364604057 abstract "Soil As contamination, which is dangerous to plants and human and may cause elevation of As concentrations in the surrounding waters, is a widespread and severe environmental problem both in China and in the world. Phytoremediation, which is an emerging plant-based technology for the removal of pollutants, have been successfully applied to remediate heavy metal contaminated soils. Pteris vittata L., an indicator plant for calcareous soils, is an As-hyperaccumulator newly discovered by Chen et al. in China. This finding may bring a hope to phytoremediate As-contaminated soils. The accumulation and translocation of necessary metals involved have not been elucidated. We investigated the interactions of As and Ca on the concentration and distribution of metals including K, Mg, Mn, Fe, Zn and Cu in Pteris vittata L. under sand culture condition. A 3×3 complete factorial experiment was designed which contained 9 treatments added with 3 As concentrations: 0, 0.1, 0.2 mmol/L and 3 concentrations of Ca: 0.03, 2.5, 5.0 mmol/L. It is shown that the Mg and Zn concentrations in roots were significantly reduced by enhancing the As levels whereas the concentrations of K, Mn, Fe and Cu in the roots were not influenced. There was no significant effect of the added As on the metal concentrations in shoots, and Mn concentration in petioles and Fe concentration in shoots. A decrease of Fe translocation from underground to aboveground and an increase of that from petiole to leaf were found with increasing As concentration in the medium. The applied As was benefit to transport Mn from petiole to leaf and Zn from root to leaf. The results show that the accumulations of Fe, Zn and Cu were not significantly affected by Ca levels. With increasing Ca concentration in the medium, K concentration in the roots increased gradually in the leaves. Applied 2.5 and 5.0 mmol/L Ca caused to reduce Mg and Mn concentration in the shoots comparing with the treatment of 0.03mmol Ca /L. Regardless of As and Ca levels, Mn was the only element among the 6 metals studied which accumulated obviously to the shoots. The interaction of metals was enhanced gradually from the roots to leaves, and the effect of the Ca level on other metal elements was very obvious. There was no significant relationship between the Ca concentration and other metals concentrations in the roots. But the positive correlation between Ca and Fe concentrations in petioles was very significantly. The K, Mg, Mn and Zn concentrations in leaves decreased as the Ca concentration increased." @default.
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- W2364604057 date "2003-01-01" @default.
- W2364604057 modified "2023-09-24" @default.
- W2364604057 title "Effects of arsenic and calcium on metal accumulation and translocation in Pteris vittata L." @default.
- W2364604057 hasPublicationYear "2003" @default.
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