Community analysis and metabolic pathway of halophilic bacteria for phenol degradation in saline environment

Zhong zi Huang, Ping Wang, Hui Li, Kuang fei Lin, Zhi yan Lu, Xiao jue Guo, Yong di Liu

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

A moderately halophilic bacterial enrichment was able to degrade 120mg/L of phenol in the presence of 1-2M of NaCl within 3d or 2.5-3M of NaCl within 6d. The optimal degradation was achieved at 1.5M of NaCl and 350mg/L of phenol. PCR-DGGE profile of the enrichment showed that the Acidobacterium sp. and Chloroflexus sp. dominated the community. The phenol-biodegradation pathways consisted of an initial oxidative attack by phenol hydroxylase, and subsequent ring fission by catechol 1,2-dioxygenase and catechol 2,3-dioxygenase. Nuclear magnetic resonance (NMR) spectroscopy profiles showed that ectoine and hydroxyectoine were the main compatible solutes to adjust the bacterial osmotic pressure. This study provides further information on the understanding of phenol-degradation over a wide range of salinity and remediation of phenol as a pollutant in the environment.

Original languageEnglish (US)
Pages (from-to)115-120
Number of pages6
JournalInternational Biodeterioration and Biodegradation
Volume94
DOIs
StatePublished - Oct 2014

Keywords

  • Biodegradation
  • Compatible solutes
  • Metabolic pathway
  • Moderately halophilics
  • Phenol

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