Exploring the diversity and functional profile of microbial communities of Brazilian soils with high salinity and oil contamination

被引:2
作者
Mariano, Danielly C. O. [1 ,3 ]
Dias, Graciela Maria [2 ]
Castro, Michele Rocha [1 ,4 ]
Tschoeke, Diogo Antonio [5 ,6 ]
de Oliveira, Fernando J. S. [7 ]
Servulo, Eliana Flavia C. [3 ]
Neves, Bianca Cruz [1 ]
机构
[1] Univ Fed Rio De Janeiro UFRJ, Inst Quim, Rio De Janeiro, Brazil
[2] Univ Fed Rio De Janeiro UFRJ, Inst Biofis Carlos Chagas Filho, Rio De Janeiro, Brazil
[3] Univ Fed Rio De Janeiro UFRJ, Escola Quim, Rio De Janeiro, Brazil
[4] Inst Fed Rio De Janeiro IFRJ, Dept Biol, Rio De Janeiro, Brazil
[5] Univ Fed Rio De Janeiro UFRJ, Inst Alberto Luiz Coimbra Posgrad & Pesquisa Engn, Rio De Janeiro, Brazil
[6] Univ Fed Rio De Janeiro UFRJ, Inst Biol, Rio De Janeiro, RJ, Brazil
[7] Petrobras SA, Rio De Janeiro, Brazil
关键词
Soil microbiome; 16S rRNA metataxonomics; Metagenomics; Metabolic profile; Biosurfactants; oil degradation; POLYCYCLIC AROMATIC-HYDROCARBONS; PETROLEUM-HYDROCARBONS; BACTERIAL COMMUNITIES; SP NOV; PSEUDOMONAS; BIODEGRADATION; BIOREMEDIATION; BIOSURFACTANT; DEGRADATION; GENES;
D O I
10.1016/j.heliyon.2024.e34336
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Environmental pollution associated with the petroleum industry is a major problem worldwide. Microbial degradation is extremely important whether in the extractive process or in bioremediation of contaminants. Assessing the local microbiota and its potential for degradation is crucial for implementing effective bioremediation strategies. Herein, contaminated soil samples of onshore oil fields from a semiarid region in the Northeast of Brazil were investigated using metagenomics and metataxonomics. These soils exhibited hydrocarbon contamination and high salinity indices, while a control sample was collected from an uncontaminated area. The shotgun analysis revealed the predominance of Actinomycetota and Pseudomonadota, while 16S rRNA gene amplicon analysis of the samples showed Actinomycetota, Bacillota, and Pseudomonadota as the most abundant. The Archaea domain phylotypes were assigned to Thermoproteota and Methanobacteriota. Functional analysis and metabolic profile of the soil microbiomes exhibited a broader metabolic repertoire in the uncontaminated soil, while degradation pathways and surfactant biosynthesis presented higher values in the contaminated soils, where degradation pathways of xenobiotic and aromatic compounds were also present. Biosurfactant synthetic pathways were abundant, with predominance of lipopeptides. The present work uncovers several microbial drivers of oil degradation and mechanisms of adaptation to high salinity, which are pivotal traits for sustainable soil recovery strategies.
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页数:17
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