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Molecules 2011, 16(2), 1409-1417; doi:10.3390/molecules16021409
Article

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

1,* , 1,2
, 3
, 1
, 1
 and 1
1 Ministry of Agriculture Key Laboratory of Non-Point Source Pollution Control, Institute of Environmental Science and Technology, Zhejiang University, Hangzhou 310029, China 2 Department of Environmental Science and Engineering, Tan Kah Kee College, Xiamen University, Zhangzhou 363105, China 3 Life Science Department, Zhejiang Chinese Medical University, Hangzhou 310053, China
* Author to whom correspondence should be addressed.
Received: 5 January 2011 / Revised: 18 January 2011 / Accepted: 20 January 2011 / Published: 7 February 2011
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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.
Keywords: sulfur transformation; PCR-DGGE; copper availability; rice rhizosphere sulfur transformation; PCR-DGGE; copper availability; rice rhizosphere
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Shi, J.-Y.; Lin, H.-R.; Yuan, X.-F.; Chen, X.-C.; Shen, C.-F.; Chen, Y.-X. Enhancement of Copper Availability and Microbial Community Changes in Rice Rhizospheres Affected by Sulfur. Molecules 2011, 16, 1409-1417.

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