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Appl. Environ. Microbiol., Oct 1995, 3556-3561, Vol 61, No. 10
AM Laverman, JS Blum, JK Schaefer, EJP Phillips, DR Lovley and RS Oremland
The selenate-respiring bacterial strain SES-3 was able to use a variety of
inorganic electron acceptors to sustain growth. SES-3 grew with the
reduction of arsenate to arsenite, Fe(III) to Fe(II), or thiosulfate to
sulfide. It also grew in medium in which elemental sulfur, Mn(IV), nitrite,
trimethylamine N-oxide, or fumarate was provided as an electron acceptor.
Growth on oxygen was microaerophilic. There was no growth with arsenite or
chromate. Washed suspensions of cells grown on selenate or nitrate had a
constitutive ability to reduce arsenate but were unable to reduce arsenite.
These results suggest that strain SES-3 may occupy a niche as an
environmental opportunist by being able to take advantage of a diversity of
electron acceptors.
Copyright © 1995, American Society for Microbiology
Growth of Strain SES-3 with Arsenate and Other Diverse Electron Acceptors
U.S. Geological Survey, Menlo Park, California 94025, and U.S. Geological Survey, Reston, Virginia 22092
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