Heterotrophic denitrification at extremely high salt and pH by haloalkaliphilic Gammaproteobacteria from hypersaline soda lakes

被引：67

作者：

Shapovalova, A. A. ^{[1
]}

Khijniak, T. V. ^{[1
]}

Tourova, T. P. ^{[1
]}

Muyzer, G. ^{[2
]}

Sorokin, D. Y. ^{[1
,2
]}

机构：

[1] Russian Acad Sci, Winogradsky Inst Microbiol, Moscow 117811, Russia

[2] Delft Univ Technol, Dept Biotechnol, NL-2628 BC Delft, Netherlands

来源：

EXTREMOPHILES | 2008年 / 12卷 / 05期

关键词：

denitrification; soda lakes; haloalkaliphilic; Halomonas; alkalispirillum;

D O I：

10.1007/s00792-008-0166-6

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

In this paper we describe denitrification at extremely high salt and pH in sediments from hypersaline alkaline soda lakes and soda soils. Experiments with sediment slurries demonstrated the presence of acetate-utilizing denitrifying populations active at in situ conditions. Anaerobic enrichment cultures at pH 10 and 4 M total Na+ with acetate as electron donor and nitrate, nitrite and N2O as electron acceptors resulted in the dominance of Gammaproteobacteria belonging to the genus Halomonas. Both mixed and pure culture studies identified nitrite and N2O reduction as rate-limiting steps in the denitrification process at extremely haloalkaline conditions.

引用

页码：619 / 625

页数：7

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