Behavioral response of dissimilatory perchlorate-reducing bacteria to different electron acceptors

• DOI: 10.1007/s00253-009-2051-3
• Publication Date: 2009-06-16T10:00:41Z
• Authors: Yvonne Sun; Ruth L. Gustavson; Nadia Ali; Karrie A. Weber; Lacey L. Westphal; John D. Coates
• Keywords: Chlorate; Perchlorate; Electron acceptor

The response behavior of three dissimilatory perchlorate-reducing bacteria to different electron acceptors (nitrate, chlorate, and perchlorate) was investigated with two assays. observed species-specific, dependent on the prior growth conditions, inhibited by oxygen. We attraction toward nitrate when Dechloromonas aromatica strain RCB Azospira suillum PS were grown nitrate. When D. agitata CKB perchlorate, both responded nitrate, perchlorate. A. organism chlorate perchlorate but not A gene replacement mutant in reductase subunit (pcrA) resulted a loss had no impact response. Washed-cell suspension studies revealed that cells reduced while only. Based these observations, energy taxis proposed as underlying mechanism for responses (per)chlorate aromatica. To best our knowledge, this study represents first investigation environmental stimuli. It clearly demonstrates chlorine oxyanions unique ability organisms distinguish structurally analogous compounds, respond accordingly.