Diversity and structure of phenanthrene degrading bacterial communities associated with fungal bioremediation in petroleum contaminated soil
| Autor: | Yingtao Sun, Gan Zhang, Longfei Jiang, Chunling Luo, Jibing Li, Li Qiqian |
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| Rok vydání: | 2021 |
| Předmět: |
Bioaugmentation
Environmental Engineering Health Toxicology and Mutagenesis 0211 other engineering and technologies Stable-isotope probing 02 engineering and technology 010501 environmental sciences 01 natural sciences Soil Bioremediation Soil Pollutants Environmental Chemistry Polycyclic Aromatic Hydrocarbons Waste Management and Disposal Soil Microbiology 0105 earth and related environmental sciences 021110 strategic defence & security studies Bacteria Sphingobacterium biology Fungi Phenanthrenes biology.organism_classification Sphingomonas Pollution Biodegradation Environmental Petroleum Cupriavidus Environmental chemistry Proteobacteria Flavobacterium |
| Zdroj: | Journal of Hazardous Materials. 403:123895 |
| ISSN: | 0304-3894 |
| DOI: | 10.1016/j.jhazmat.2020.123895 |
| Popis: | Fungal bioremediation is a promising technique for the cleanup of sites contaminated with polycyclic aromatic hydrocarbons (PAHs). However, due to limited understanding of the composition and dynamics of the native PAH-degrading microorganisms in contaminated sites, its application has been difficult. In the present study, DNA stable-isotope probing was performed to identify indigenous phenanthrene (PHE)-degrading bacteria and determine their diversity during the fungal bioremediation process. The results showed a total of 14 operational taxonomic units (OTUs) enriched in the heavy DNA fractions, which were related to seven genera (Sphingomonas, Sphingobacterium, Acidovorax, Massilia, Flavobacterium, Cupriavidus, Aeromicrobium, and unclassified Chitinophagaceae). Along with enhanced efficiency of PHE removal, the number and diversity of indigenous PHE-degrading bacteria in soil bioaugmented with fungi were significantly increased. Furthermore, based on the results of linear model analysis, we found that PHE degraders affiliated with the genus Sphingomonas were significantly enriched during fungal bioremediation. Moreover, fungal bioaugmentation promoted indigenous functional Proteobacteria involved in PAH degradation through co-metabolism, suggesting that PAH biodegradation was attributable to cooperative metabolism by fungi and indigenous bacteria. Our findings provide new insights into the diversity of PHE-degrading communities and support a more comprehensive view of the fungal bioremediation process. |
| Databáze: | OpenAIRE |
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