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Enhancement of Copper Availability and Microbial Community Changes in Rice Rhizospheres Affected by Sulfur

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Author(s): Ji-Yan Shi | Hui-Rong Lin | Xiao-Feng Yuan | Xin-Cai Chen | Chao-Feng Shen | Ying-Xu Chen

Journal: Molecules
ISSN 1420-3049

Volume: 16;
Issue: 2;
Start page: 1409;
Date: 2011;
Original page

Keywords: sulfur transformation | PCR-DGGE | copper availability | rice rhizosphere

ABSTRACT
The role of sulfur on the availability of Cu and the bacterial community in rice rhizospheres was investigated by pot experiments. With sulfur addition, pH in rhizosphere soil decreased and Mg(NO3)2 extractable Cu increased significantly. The bacterial community composition also changed with sulfur addition. Some specific clones having high similarity to Thiobacillus, which indicated that sulfur oxidation in the rice rhizosphere could increase the availability of Cu. These results suggested that sulfur source which could provide substrate to sulfur oxidizing bacteria and enhance the availability of Cu was not a suitable sulfur fertilizer for Cu polluted soil.
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