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Involvement of antioxidant defense system in solvent tolerance of Pseudomonas putida BCNU 106
Author(s) -
Choi Hye Jung,
Yoo JuSoon,
Jeong Yong Kee,
Joo Woo Hong
Publication year - 2014
Publication title -
journal of basic microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.58
H-Index - 54
eISSN - 1521-4028
pISSN - 0233-111X
DOI - 10.1002/jobm.201300176
Subject(s) - antioxidant , toluene , pseudomonas putida , chemistry , catalase , superoxide dismutase , glutathione reductase , solvent , biochemistry , enzyme , organic chemistry , glutathione peroxidase
The highly solvent‐tolerant bacterium Pseudomonas sp. BCNU 106 was investigated to elucidate the solvent tolerance under specific culture conditions with the presence of solvents and its adaptive mechanisms to those conditions with reference to the antioxidant system. When exposed to 10% toluene, Pseudomonas sp. BCNU 106 increased the generation of reactive oxygen species assessed by monitoring the oxidation of 2′,7′‐dichlorofluorescein. Typical antioxidant enzymes ( viz . catalase, superoxide dismutase, and glutathione reductase) showed increased activity with prolonged incubation in 10% toluene. In addition, the levels of these antioxidant proteins were higher during exposure to 10% toluene than in toluene‐free condition. The present study indicates that antioxidant defense activity is one of the adaptive and protective mechanisms developed to avoid the deleterious damage of organic solvents, especially toluene.