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Int J Syst Evol Microbiol 54 (2004), 1849-1855; DOI  10.1099/ijs.0.63109-0
© 2004 International Union of Microbiological Societies

Rubrobacter taiwanensis sp. nov., a novel thermophilic, radiation-resistant species isolated from hot springs

Mao-Yen Chen1, Shih-Hsiung Wu1,2, Guang-Huey Lin3, Chun-Ping Lu2, Yung-Ting Lin4, Wen-Chang Chang1,2,{dagger} and San-San Tsay4,{dagger}

1 Institute of Biological Chemistry, Academia Sinica, 115 Taipei, Taiwan
2 Institute of Biochemical Sciences, National Taiwan University, 106 Taipei, Taiwan
3 Department of Microbiology, Tzu Chi University, 970 Hualien, Taiwan
4 Institute of Plant Biology, National Taiwan University, 106 Taipei, Taiwan

Correspondence
San-San Tsay
sstsay{at}ntu.edu.tw

Two novel bacteria, with an optimum growth temperature of approximately 60 °C, were isolated from Lu-shan hot springs in the central region of Taiwan. These isolates were aerobic, thermophilic, halotolerant, pink-pigmented, heterotrophic and resistant to gamma-radiation. Both pleomorphic, short, rod-shaped cells and coccoid cells were observed. Strains LS-286 (=ATCC BAA-452=BCRC 17198) and LS-293T (=ATCC BAA-406T=BCRC 17173T) represented a novel species of the genus Rubrobacter, according to a phylogenetic analysis of the 16S rRNA gene, DNA–DNA hybridization, biochemical features and fatty acid composition. The name Rubrobacter taiwanensis sp. nov. is proposed for this novel species, with LS-293T as the type strain.

{dagger}San-San Tsay and Wen-Chang Chang contributed equally to this work.

Published online ahead of print on 16 April 2004 as DOI 10.1099/ijs.0.63109-0.

The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequences of strains LS-293T and LS-286 are AF465803 and AF479791, respectively.

Images produced using scanning electron microscopy and atomic-force microscopy are available, together with pH and salinity data and fatty acid profiles, as supplementary material in IJSEM Online.




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