Current Microbiology

, Volume 65, Issue 4, pp 345–349 | Cite as

The Effect of Some Factors of Polluted Environment on Catalase Responses and Resistance of Microbial Isolates Against Toxic Oxidative Stress

Article
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Abstract

The properties of bacterial isolates from polluted environments which are characterized by increased levels of oxidative stress do not reflect only the level of contaminants, but also arise as a consequence of many permanently changed conditions. The survival rate of Comamonas terrigena N3H isolates from an environment with elevated levels of H2O2 is correlated with stimulation of catalase. The response of bacterial catalase to the effect of phenol in exogenous conditions was affected by the presence of an additional contaminant, Cd2+. An isolate of Aspergillus niger selected from river sediment containing 363 mg/kg As, 93 mg/kg Sb at pH 5.2–4.8 grew on Czapek-Dox agar ~1.6 times faster than an isolate of the same species from coal dust sediment with approximately the same level of pollution (400 mg/kg As) but somewhat lower pH (3.3–2.8). It also exhibited differences in the microscopic characteristics of its mycelial structures. Both isolates exhibited a higher tolerance to the exogenic toxic effects of metals (As5+, Cd2+, and Cu2+ at 5, 25, or 50 mg/L) than a control culture, but the differences in tolerance between them were only slight. These laboratory results suggest that there are complicated relationships which may exist in the “in situ” environment.

Keywords

Catalase Activity Coal Dust Original Isolate Mycelial Structure Late Stationary Growth Phase 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Notes

Acknowledgments

This study was supported by the Grant 2/0149/11 of VEGA (Slovak Science fund).

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© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  1. 1.Institute of Molecular BiologySlovak Academy of SciencesBratislavaSlovakia

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