Degradation of 4-bromophenol by Ochrobactrum sp. HI1 isolated from desert soil: pathway and isotope effects
| Autor: | Alicia A. Taylor, Anat Bernstein, Tomasz Kuder, Faina Gelman, Rotem Golan, Zeev Ronen |
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| Rok vydání: | 2018 |
| Předmět: |
Benzenetriol
Environmental Engineering Bioengineering 010501 environmental sciences Chemical Fractionation Ochrobactrum 01 natural sciences Microbiology Hydroxylation 03 medical and health sciences chemistry.chemical_compound Phenols RNA Ribosomal 16S Kinetic isotope effect Environmental Chemistry Phylogeny Soil Microbiology 0105 earth and related environmental sciences Isotope analysis 0303 health sciences Carbon Isotopes Isotope 030306 microbiology Chemistry Biodegradation Pollution Aerobiosis Biodegradation Environmental Isotopes of carbon Environmental chemistry Degradation (geology) Desert Climate |
| Zdroj: | Biodegradation. 30(1) |
| ISSN: | 1572-9729 |
| Popis: | Anthropogenic activities have introduced elevated levels of brominated phenols to the environment. These compounds are associated with toxic and endocrine effects, and their environmental fate is of interest. An aerobic strain Ochrobactrum sp. HI1 was isolated from soils in the vicinity of a bromophenol production plant and tested for its ability to degrade 4-bromophenol (4-BP). A ring hydroxylation pathway of degradation was proposed, using the evidence from degradation intermediates analysis and multi-element (C, Br, H) compound-specific isotope analysis. Benzenetriol and 4-bromocatechol were detected during degradation of 4-bromophenol. Degradation resulted in a normal carbon isotope effect (eC = −1.11 ± 0.09‰), and in insignificant bromine and hydrogen isotope fractionation. The dual C–Br isotope trend for ring hydroxylation obtained in the present study differs from the trends expected for reductive debromination or photolysis. Thus, the isotope data reported herein can be applied in future field studies to delineate aerobic biodegradation processes and differentiate them from other natural attenuation processes. |
| Databáze: | OpenAIRE |
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