Abstract
Biofilms harboring simultaneously anoxygenic and oxygenic phototrophic bacteria, diazotrophic bacteria, and hydrocarbon-utilizing bacteria were established on glass slides suspended in pristine and oily seawater. Via denaturing gradient gel electrophoresis analysis on PCR-amplified rRNA gene sequence fragments from the extracted DNA from biofilms, followed by band amplification, biofilm composition was determined. The biofilms contained anoxygenic phototrophs belonging to alphaproteobacteria; pico- and filamentous cyanobacteria (oxygenic phototrophs); two species of the diazotroph Azospirillum; and two hydrocarbon-utilizing gammaproteobacterial genera, Cycloclasticus and Oleibacter. The coexistence of all these microbial taxa with different physiologies in the biofilm makes the whole community nutritionally self-sufficient and adequately aerated, a condition quite suitable for the microbial biodegradation of aquatic pollutant hydrocarbons.
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Acknowledgements
This work has been supported by the Kuwait University, research grant SL02/08. We would also like to acknowledge the use of ABI 3130xl Genetic Analyzer under the General Facility Projects GS01/02 and Mrs. Leena Idicula for her technical assistance.
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Al-Bader, D., Kansour, M.K., Rayan, R. et al. Biofilm comprising phototrophic, diazotrophic, and hydrocarbon-utilizing bacteria: a promising consortium in the bioremediation of aquatic hydrocarbon pollutants. Environ Sci Pollut Res 20, 3252–3262 (2013). https://doi.org/10.1007/s11356-012-1251-z
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DOI: https://doi.org/10.1007/s11356-012-1251-z