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Linking Microbial Community and Catabolic Gene Structures during the Adaptation of Three Contaminated Soils under Continuous Long-Term Pollutant Stress
D. Lima-Morales, R. Jáuregui, A. Camarinha-Silva, R. Geffers, DH. Pieper, R. Vilchez-Vargas,
Jazyk angličtina Země Spojené státy americké
Typ dokumentu srovnávací studie, časopisecké články, práce podpořená grantem
NLK
Free Medical Journals
od 1976 do Před 6 měsíci
PubMed Central
od 1976 do Před 6 měsíci
Europe PubMed Central
od 1976 do Před 6 měsíci
Open Access Digital Library
od 1953-01-01
PubMed
26850298
DOI
10.1128/aem.03482-15
Knihovny.cz E-zdroje
- MeSH
- Bacteria klasifikace genetika izolace a purifikace metabolismus MeSH
- bakteriální proteiny genetika metabolismus MeSH
- benzen metabolismus MeSH
- benzenové deriváty metabolismus MeSH
- biodegradace MeSH
- biodiverzita MeSH
- látky znečišťující půdu metabolismus MeSH
- půda chemie MeSH
- půdní mikrobiologie * MeSH
- toluen metabolismus MeSH
- xyleny metabolismus MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- srovnávací studie MeSH
- Geografické názvy
- Brazílie MeSH
- Česká republika MeSH
- Švýcarsko MeSH
Three types of contaminated soil from three geographically different areas were subjected to a constant supply of benzene or benzene/toluene/ethylbenzene/xylenes (BTEX) for a period of 3 months. Different from the soil from Brazil (BRA) and Switzerland (SUI), the Czech Republic (CZE) soil which was previously subjected to intensive in situ bioremediation displayed only negligible changes in community structure. BRA and SUI soil samples showed a clear succession of phylotypes. A rapid response to benzene stress was observed, whereas the response to BTEX pollution was significantly slower. After extended incubation, actinobacterial phylotypes increased in relative abundance, indicating their superior fitness to pollution stress. Commonalities but also differences in the phylotypes were observed. Catabolic gene surveys confirmed the enrichment of actinobacteria by identifying the increase of actinobacterial genes involved in the degradation of pollutants. Proteobacterial phylotypes increased in relative abundance in SUI microcosms after short-term stress with benzene, and catabolic gene surveys indicated enriched metabolic routes. Interestingly, CZE soil, despite staying constant in community structure, showed a change in the catabolic gene structure. This indicates that a highly adapted community, which had to adjust its gene pool to meet novel challenges, has been enriched.
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