ArticleCurrent microbiology2026
Metabolic Specialization and Synergy in Alkane Degradation By a Microbial Consortium: An Integrated Genomic and Geochemical Approach.
Article in Current microbiology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The constant demand for petroleum and the recurrence of environmental accidents led to the development of sustainable strategies for the treatment of contaminated areas, such as bioremediation. Alkanes, being one of the most abundant and challenging fractions of petroleum in terms of biodegradation, demand microorganisms with high metabolic specialization and the incorporation of bacterial consortia, which possess high efficiency due to inter-species synergy. This study had as its objective to integrate genomic and geochemical analyses to unveil the potential and mechanisms of alkane degradation by nine bacterial strains (Bacillus, Brevibacillus, Pseudomonas, and Stenotrophomonas) isolated from a contaminated mangrove. The genomic sequencing and functional annotation revealed the presence of key genes and enzymes associated with alkane activation and oxidation, distributed among different bacterial genera. The geochemical analyses by GC-FID, supported by statistical evaluation, demonstrated the obligatory synergy of the complete consortium for the efficient degradation of intermediate fractions. Individual strains exhibited distinct ecological roles: Pseudomonas and Stenotrophomonas acted as rapid degraders, while Bacillus specialized in the delayed and highly efficient degradation of recalcitrant heavy fractions, likely mediated by biosurfactant production. Furthermore, the study evidenced the complexity of geochemical data analysis in multiphasic systems, where anomalous negative variations were identified as methodological artifacts resulting from biofilm formation and heterogeneous sampling, rather than metabolic limitations. The integration of genomic and geochemical results revealed itself to be a powerful tool to elucidate microbial interactions and to understand the specific alkane degradation mechanisms of each genus in the bioremediation process.
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