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Alicyclobacillus ferrooxydans sp. nov., a ferrous-oxidizing bacterium from solfataric soil

State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, PR China

Correspondence
Shuang-Jiang Liu
liusj{at}sun.im.ac.cn

A novel mesophilic and acidophilic Gram-positive bacterium, designated strain TC-34^T, was isolated from solfataric soil. Strain TC-34^T grew aerobically at 17–40 °C and pH 2.0–6.0, and optimally at 28 °C and pH 3.0. Analysis based on 16S rRNA gene sequences showed that strain TC-34^T was phylogenetically related to members of the genus Alicyclobacillus, with the highest similarity (94.8 %) to Alicyclobacillus pomorum. Strain TC-34^T showed a range of phenotypic characteristics that differentiated it from recognized Alicyclobacillus species, including growth temperature, assimilation of carbon sources and production of acids from a range of compounds. Strain TC-34^T was able to oxidize ferrous iron and its growth was correlated with the oxidation of Fe²⁺ in culture medium. -Alicyclic fatty acids were not detected. On the basis of these results, it was concluded that strain TC-34^T represents a novel species of the genus Alicyclobacillus, for which the name Alicyclobacillus ferrooxydans (type strain TC-34^T=JCM 15090^T=CGMCC 1.6357^T) is proposed.

A table detailing the cellular fatty acid compositions of the type/reference strains of Alicyclobacillus ferrooxydans sp. nov. and related Alicyclobacillus species is available as supplementary material with the online version of this paper.

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