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|Title:||Sulfur (S)-induced enhancement of iron plaque formation in the rhizosphere reduces arsenic accumulation in rice (Oryza sativa L.) seedlings|
|Citation:||Environmental Pollution, 2007; 147(2):387-393|
|Publisher:||Elsevier Sci Ltd|
|Zheng-Yi Hu, Yong-Guan Zhu, Min Li, Li-Gan Zhang, Zhi-Hong Cao and F. Andrew Smith|
|Abstract:||The effects of two sulfur (S) sources (SO(4)(2-), S(0)), and three rates of S application (0, 30, 120 mgS/kg) on the formation of iron plaque in the rhizosphere, and on the root surface of rice, and As (arsenic) uptake into rice (Oryza sativa L.) were studied in a combined soil-sand culture experiment. Significant differences in As uptake into rice between +S and -S treatments were observed in relation to S sources, and rates of S application. Concentrations of As in rice shoots decreased with increasing rates of S application. The mechanism could be ascribed to sulfur, induced the formation of iron plaque, since concentrations of Fe in iron plaque on quartz sands in the rhizosphere, and on the root surface of rice increased with increasing rates of S application. The results suggest that sulfur fertilization may be important for the development approaches to reducing As accumulation in rice.|
|Keywords:||Sulfur; Sulfate; Elemental sulfur; Arsenic; Iron plaque; Rice (Oryza sativa L.); Rhizosphere|
|Description:||Copyright © 2006 Elsevier Ltd. All rights reserved.|
|Appears in Collections:||Soil and Land Systems publications|
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