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Applied and Environmental Microbiology, May 2004, p. 3152-3157, Vol. 70, No. 5
0099-2240/04/$08.00+0     DOI: 10.1128/AEM.70.5.3152-3157.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.

Salinity Decreases Nitrite Reductase Gene Diversity in Denitrifying Bacteria of Wastewater Treatment Systems

Sachiko Yoshie,1 Naohiro Noda,2 Satoshi Tsuneda,1* Akira Hirata,1 and Yuhei Inamori3

Department of Chemical Engineering, Waseda University, Shinjuku-ku, Tokyo 169-8555,1 National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8566,2 National Institute for Environmental Studies, Tsukuba, Ibaraki 305-0053, Japan3

Received 14 October 2003/ Accepted 23 January 2004

Investigation of the diversity of nirK and nirS in denitrifying bacteria revealed that salinity decreased the diversity in a nitrate-containing saline wastewater treatment system. The predominant nirS clone was related to nirS derived from marine bacteria, and the predominant nirK clone was related to nirK of the genus Alcaligenes.

* Corresponding author. Mailing address: Department of Chemical Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku-ku, Tokyo 169-8555, Japan. Phone: 81-3-5286-3210. Fax: 81-3-3209-3680. E-mail: stsuneda{at}waseda.jp.

Applied and Environmental Microbiology, May 2004, p. 3152-3157, Vol. 70, No. 5
0099-2240/04/$08.00+0     DOI: 10.1128/AEM.70.5.3152-3157.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.



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