Anaerobically grown <Emphasis Type="Italic">Thauera aromatica</Emphasis>, <Emphasis Type="Italic">Desulfococcus multivorans</Emphasis>, <Emphasis Type="Italic">Geobacter sulfurreducens</Emphasis> are more sensitive towards organic solvents than aerobic bacteria |
| |
Authors: | Ilka Duldhardt Ivonne Nijenhuis Frieder Schauer Hermann J Heipieper |
| |
Institution: | (1) Department of Bioremediation, UFZ—Helmholtz Centre for Environmental Research, Permoserstr. 15, 04318 Leipzig, Germany;(2) Department of Isotope Biogeochemistry, UFZ—Helmholtz Centre for Environmental Research, Permoserstr. 15, 04318 Leipzig, Germany;(3) Department of Applied Microbiology, Institute of Microbiology, Ernst-Moritz-Arndt-University Greifswald, F.-L.-Jahn-Str. 15, 17487 Greifswald, Germany |
| |
Abstract: | The effect of seven important pollutants and three representative organic solvents on growth of Thauera aromatica K172, as reference strain for nitrate-reducing anaerobic bacteria, was investigated. Toxicity in form of the effective concentrations
(EC50) that led to 50% growth inhibition of potential organic pollutants such as BTEX (benzene, toluene, ethylbenzene, and
xylene), chlorinated phenols and aliphatic alcohols on cells was tested under various anaerobic conditions. Similar results
were obtained for Geobacter sulfurreducens and Desulfococcus multivorans as representative for Fe3+-reducing and sulphate-reducing bacteria, respectively, leading to a conclusion that anaerobic bacteria are far more sensitive
to organic pollutants than aerobic ones. Like for previous studies for aerobic bacteria, yeast and animal cell cultures, a
correlation between toxicity and hydrophobicity (log P values) of organic compounds for different anaerobic bacteria was ascertained. However, compared to aerobic bacteria, all
three tested anaerobic bacteria were shown to be about three times more sensitive to the tested substances. |
| |
Keywords: | Organic pollutants BTEX Phenols Toxicity Anaerobic bacteria Thauera aromatica Desulfococcus multivorans Geobacter sulfurreducens |
本文献已被 PubMed SpringerLink 等数据库收录! |
|