Isolation and characterization of a thermotolerant bacterium Ralstonia sp strain PHS1 that degrades benzene, toluene, ethylbenzene, and o-xylene
SCIE
SCOPUS
- Title
- Isolation and characterization of a thermotolerant bacterium Ralstonia sp strain PHS1 that degrades benzene, toluene, ethylbenzene, and o-xylene
- Authors
- Lee, SK; Lee, SB
- Date Issued
- 2001-07
- Publisher
- SPRINGER-VERLAG
- Abstract
- A thermotolerant bacterium, designated as PHS1, was isolated from a hot spring in Pohang, Korea, on the basis of its ability to grow on benzene, toluene, ethylbenzene, and xylenes (BTEX) as a sole carbon source. Strain PHS1 is a gram-negative, rod-shaped aerobe and grows optimally at 42 degreesC and pH 7.2. According to 16 S rDNA analysis, strain PHS1 showed highest similarity to Ralstonia eutropha (previously named Alcaligenes eutrophus). Unlike its closest known Ralstonia species, however, strain PHS1 was able to utilize toluene, ethylbenzene, o-xylene, and both m- and o-cresol. The degradation of o-xylene, by strain PHS I is particularly important, since o-xylene is a compound of considerable environmental interest, owing to its recalcitrance; and very few microorganisms have been reported to utilize o-xylene as a sole carbon source. It was found that strain PHS1 transformed o-xylene to 2,3-dimethylphenol through direct oxygenation of the aromatic ring. The unique properties of strain PHS1, such as thermotolerance and the ability to degrade o-xylene, may have important implications for the treatment of BTEX-contaminated industrial effluents.
- Keywords
- PSEUDOMONAS-STUTZERI STRAIN; DENITRIFYING CONDITIONS; THERMOPHILIC BIODEGRADATION; BTEX; DEGRADATION; BIOTRANSFORMATION; HYDROCARBONS; METABOLISM; CONSORTIA
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/20985
- DOI
- 10.1007/s002530100608
- ISSN
- 0175-7598
- Article Type
- Article
- Citation
- APPLIED MICROBIOLOGY AND BIOTECHNOLOGY, vol. 56, no. 1-2, page. 270 - 275, 2001-07
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