Quinone Profiles Reflecting Population Dynamics of Denitrifying Phosphate-Accumulating Organisms

Satoshi Tsuneda*, Takashi Ohno, Johwan Ahn, Tomotaka Daidou, Akira Hirata

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Selective enrichment of phosphate-accumulating organisms (PAOs) and denitrifying phosphate-accumulating organisms (DNPAOs) was conducted using a sequencing batch reactor (SBR). To elucidate biomarkers for DNPAOs, quinone profiles were monitored during selective enrichment. As a result, a high correlation between the mole fraction of ubiquinone with eight isoprene units (Q-8) and anoxic phosphate uptake ability was observed, indicating that Q-8 was one of the biomarkers for DNPAOs. In addition, the mole ratio of ubiquinones to menaquinones (Q/MK) increased throughout this selective enrichment.

Original languageEnglish
Pages (from-to)69-73
Number of pages5
JournalMicrobes and Environments
Issue number2
Publication statusPublished - 2003


  • denitrifying phosphate-accumulating organisms (DNPAOs)
  • enhanced biological phosphorus removal (EBPR)
  • phosphate-accumulating organisms (PAOs)
  • quinone profile

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Soil Science
  • Plant Science


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