Diversity of octylphenol polyethoxylate-degrading bacteria: With a special reference to Brevibacterium sp. TX4

Yi Wen Lin, Chia Chin Yang, Nguyen Ngoc Tuan, Shir Ly Huang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Octylphenol polyethoxylates (OPEOn) are surfactants and prone to degradation into xenoestrogenic metabolites, polluting various environments. We sought to identify bacterial strains and potential metabolic pathways involved in OPEOn degradation. By enrichment culture, a greater diversity of bacterial strains was noted in a green house of pesticide factory, which had frequently sprayed by different formulated pesticides, compared to a rice field and a drainage ditch (32:6:5). These bacteria grew on OPEOn as the sole carbon source; seven genera had not been previously reported, of which only Brevibacterium was Gram-positive. Metabolic analysis by HPLC/MS revealed that Brevibacterium sp. TX4 could shorten the ethoxylate chain thereby degrading OPEOn, during which O2 was required. Hence, with frequent spray of pesticides formulated with anionic surfactants such as OPEOn could increase the diversity of OPEOn-degrading bacteria. Brevibacterium sp. TX4 is the first Gram-positive bacterium which was demonstrated to shorten the ethoxylate chain of OPEOn.

Original languageEnglish
Pages (from-to)55-63
Number of pages9
JournalInternational Biodeterioration and Biodegradation
Volume115
DOIs
StatePublished - 1 Nov 2016

Keywords

  • Biodegradation
  • Brevibacterium sp.
  • Metabolites
  • Nonionic surfactants
  • Octylphenol polyethoxylates

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