Abstract:
:A species of Dechlorospirillum was isolated from an Fe(II)-oxidizing, opposing-gradient-culture enrichment using an inoculum from a circumneutral, freshwater creek that showed copious amounts of Fe(III) (hydr)oxide precipitation. In gradient cultures amended with a redox indicator to visualize the depth of oxygen penetration, Dechlorospirillum sp. strain M1 showed Fe(II)-dependent growth at the oxic-anoxic interface and was unable to utilize sulfide as an alternate electron donor. The bacterium also grew with acetate as an electron donor under both microaerophilic and nitrate-reducing conditions, but was incapable of organotrophic Fe(III) reduction or nitrate-dependent Fe(II) oxidation. Although members of the genus Dechlorospirillum are primarily known as perchlorate and nitrate reducers, our results suggest that some species are members of the microbial communities involved in iron redox cycling at the oxic-anoxic transition zones in freshwater sediments.
journal_name
FEMS Microbiol Lettjournal_title
FEMS microbiology lettersauthors
Picardal FW,Zaybak Z,Chakraborty A,Schieber J,Szewzyk Udoi
10.1111/j.1574-6968.2011.02265.xsubject
Has Abstractpub_date
2011-06-01 00:00:00pages
51-7issue
1eissn
0378-1097issn
1574-6968journal_volume
319pub_type
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