Effective bioremediation of a petroleum-polluted saline soil by a surfactant-producing Pseudomonas aeruginosa consortium

Journal of Advanced Research

Maryam Hashemi¹  Nayer Azam Khoshkholgh Sima¹  Ali Ebadi²  Mohsen Olamaee²  Reza Ghorbani Nasrabadi² 

[1] Agricultural Biotechnology Research Institute of Iran (ABRII), AREEO, P.O. Box: 31535-1897, Karaj, Iran;Department of Soil Science, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran;

关键词: Bacterial consortium;    Bioaugmentation;    Dehydrogenase activity;    Phytotoxicity;    Salinity;   

DOI  :  10.1016/j.jare.2017.06.008

来源: DOAJ

【 摘 要 】

Bacteria able to produce biosurfactants can use petroleum-based hydrocarbons as a carbon source. Herein, four biosurfactant-producing Pseudomonas aeruginosa strains, isolated from oil-contaminated saline soil, were combined to form a bacterial consortium. The inoculation of the consortium to contaminated soil alleviated the adverse effects of salinity on biodegradation and increased the rate of degradation of petroleum hydrocarbon approximately 30% compared to the rate achieved in non-treated soil. In saline condition, treatment of polluted soil with the consortium led to a significant boost in the activity of dehydrogenase (approximately 2-fold). A lettuce seedling bioassay showed that, following the treatment, the soil's level of phytotoxicity was reduced up to 30% compared to non-treated soil. Treatment with an appropriate bacterial consortium can represent an effective means of reducing the adverse effects of salinity on the microbial degradation of petroleum and thus provides enhancement in the efficiency of microbial remediation of oil-contaminated saline soils.

【 授权许可】

Unknown