期刊
CANADIAN JOURNAL OF MICROBIOLOGY
卷 54, 期 12, 页码 977-983出版社
CANADIAN SCIENCE PUBLISHING
DOI: 10.1139/W08-091
关键词
heat shock; oxidative stress; fungi; protein carbonyls; trehalose; antioxidant enzymes
资金
- National Science Fund of the Ministry of Education and Science, Bulgaria [K-1401/04]
To extend the knowledge about the relationship between heat shock and oxidative stress in lower eukaryotes, the filamentous fungus Aspergillus niger 26 was chosen as a model system. Here, the response of A. niger cells to heat shock is reported. The temperature treatment significantly increased the levels of reactive oxygen species, Superoxide anions (O-2(center dot)), and hydrogen peroxide and the rate of cyanide-resistant respiration as a marker of oxidative stress. Enhanced reactive oxygen species generation coincided with an increase in the content of oxidative damaged protein and in the accumulation of the storage carbohydrates trehalose and glycogen. Thermal survival of the A. niger cells corresponded to a significant increase in the levels of the antioxidant enzymes superoxide dismutase and catalase for all variants. These observations Suggest that heat and oxidative stress have a common cellular effect.
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