Environmental biology

Changes of microbial community structures and functional genes duringbiodegradation of phenolic compounds under high salt condition

WANG Ping , QU Yuanyuan , ZHOU Jiti


Received August 08, 2008,Revised November 04, 2008, Accepted , Available online

Volume 21,2009,Pages 821-826

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The changes of microbial community structures and functional genes during the biodegradation of single phenol and phenol plus p-cresol under high salt condition were explored. It was found that the phenol-fed system (PFS) exhibited stronger degrading abilities and more stable biomass than that of the phenol plus p-cresol-fed system (PCFS). The microbial community structures were revealed by a modern DNA fingerprint technique, ribosomal intergenic spacer analysis (RISA). The results indicated that the microbial community of PFS changed obviously when gradually increased phenol concentration, while PCFS showed a little change. 16S rRNA sequence analysis of the major bands showed that Alcanivorax sp. genus was predominant species during phenolic compounds degradation. Furthermore, amplified functional DNA restriction analysis (AFDRA) on phenol hydroxylase genes showed that the fingerprints were substantially di erent in the two systems, and the fingerprints were not the same during the di erent operational periods.

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