A novel Acidimicrobium species in continuous cultures of moderately thermophilic, mineral-sulfide-oxidizing acidophiles

被引:34
作者
Cleaver, Adam A. [1 ]
Burton, Nicolas P. [1 ]
Norris, Paul R. [1 ]
机构
[1] Univ Warwick, Dept Biol Sci, Coventry CV4 7AL, W Midlands, England
关键词
YELLOWSTONE-NATIONAL-PARK; SP-NOV; BACTERIA; BIOMINERALIZATION; DIVERSITY; OXIDATION; PYRITE;
D O I
10.1128/AEM.02658-06
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
A novel species of Acidimicrobium appeared to be the predominant ferrous iron oxidizer in a mixed culture that effected the continuous, efficient extraction of nickel from a mineral concentrate at 49 degrees C, but it was not isolated in pure culture. It outcompeted Acidimicrobium ferrooxidans, which was expected to have a major role in iron oxidation in reactors gassed with air, and was outnumbered at 49 degrees C only by the sulfur-oxidizing Acidithiobacillus caldus. Sulfobbacillus species were expected to compete with Acidimicrobium species when culture aeration was enriched with carbon dioxide, but they were a minor component of the populations with and without this enrichment. Sulfobacillus thermosulfidooxidans replaced the Acidimicrobium species and Acidithiobacillus caldus when the temperature was increased to 55 degrees C.
引用
收藏
页码:4294 / 4299
页数:6
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