Growth of Pseudomonas chloritidismutans AW-1(T) on n-alkanes with chlorate as electron acceptor

F. Mehboob, H. Junca, G. Schraa, A.J.M. Stams

Research output: Contribution to journalArticleAcademicpeer-review

38 Citations (Scopus)

Abstract

Microbial (per)chlorate reduction is a unique process in which molecular oxygen is formed during the dismutation of chlorite. The oxygen thus formed may be used to degrade hydrocarbons by means of oxygenases under seemingly anoxic conditions. Up to now, no bacterium has been described that grows on aliphatic hydrocarbons with chlorate. Here, we report that Pseudomonas chloritidismutans AW-1(T) grows on n-alkanes (ranging from C7 until C12) with chlorate as electron acceptor. Strain AW-1(T) also grows on the intermediates of the presumed n-alkane degradation pathway. The specific growth rates on n-decane and chlorate and n-decane and oxygen were 0.5 +/- 0.1 and 0.4 +/- 0.02 day(-1), respectively. The key enzymes chlorate reductase and chlorite dismutase were assayed and found to be present. The oxygen-dependent alkane oxidation was demonstrated in whole-cell suspensions. The strain degrades n-alkanes with oxygen and chlorate but not with nitrate, thus suggesting that the strain employs oxygenase-dependent pathways for the breakdown of n-alkanes
Original languageEnglish
Pages (from-to)739-747
JournalApplied Microbiology and Biotechnology
Volume83
Issue number4
DOIs
Publication statusPublished - 2009

Keywords

  • sp strain m-1
  • sulfate-reducing bacterium
  • functional-analysis
  • omega-hydroxylase
  • anoxic conditions
  • escherichia-coli
  • fatty-acids
  • genes
  • monooxygenase
  • oleovorans

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