Reconstructing metabolic pathways of hydrocarbon-degrading bacteria from the Deepwater Horizon oil spill

γ蛋白杆菌 碳氢化合物 环境化学 十六烷 正庚烷 芳香烃 深水地平线 细菌 化学 生物 环境科学 石油泄漏 古生物学 有机化学 环境工程 16S核糖体RNA
作者
Nina Dombrowski,John A. Donaho,Tony Gutiérrez,Kiley W. Seitz,Andreas Teske,Brett J. Baker
出处
期刊:Nature microbiology 卷期号:1 (7) 被引量:186
标识
DOI:10.1038/nmicrobiol.2016.57
摘要

The Deepwater Horizon blowout in the Gulf of Mexico in 2010, one of the largest marine oil spills1, changed bacterial communities in the water column and sediment as they responded to complex hydrocarbon mixtures2–4. Shifts in community composition have been correlated to the microbial degradation and use of hydrocarbons2,5,6, but the full genetic potential and taxon-specific metabolisms of bacterial hydrocarbon degraders remain unresolved. Here, we have reconstructed draft genomes of marine bacteria enriched from sea surface and deep plume waters of the spill that assimilate alkane and polycyclic aromatic hydrocarbons during stable-isotope probing experiments, and we identify genes of hydrocarbon degradation pathways. Alkane degradation genes were ubiquitous in the assembled genomes. Marinobacter was enriched with n-hexadecane, and uncultured Alpha- and Gammaproteobacteria populations were enriched in the polycyclic-aromatic-hydrocarbon-degrading communities and contained a broad gene set for degrading phenanthrene and naphthalene. The repertoire of polycyclic aromatic hydrocarbon use varied among different bacterial taxa and the combined capabilities of the microbial community exceeded those of its individual components, indicating that the degradation of complex hydrocarbon mixtures requires the non-redundant capabilities of a complex oil-degrading community. Bacteria enriched from surface and plume waters of the 2010 Deepwater Horizon oil spill show that the combined capabilities of community-wide hydrocarbon degradation is greater than its individual components.
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