title: Fe(II)EDTA-NO reduction coupled with Fe(II)EDTA oxidation by a nitrate- and Fe(III)-reducing bacterium.
abstract: The nitrate- and Fe(III)-reducing bacterium Paracoccus versutus LYM was characterized in terms of its ability to perform Fe(II)EDTA-NO reduction coupled with Fe(II)EDTA oxidation (NO-dependent Fe(II)EDTA oxidation, NDFO). It experienced a single anaerobic FeEDTA redox cycling through NDFO and dissimilatory Fe(III)EDTA reduction in FeEDTA culture. The increase in the Fe(II)EDTA concentration contributed to the ascending Fe(II)EDTA-NO reduction rate. The amount of glucose controlled the rate and extent of Fe(II) oxidation during NDFO. Without glucose addition, Fe(II)EDTA-NO reduction rate was at a rather slow rate even in presence of relatively sufficient Fe(II)EDTA. Unlike aqueous Fe(2+) and solid-phase Fe(II), Fe(II)EDTA could prevent cells from encrustations. These findings suggested the occurrence of NDFO preferred being beneficial via a mixotrophic physiology in the presence of an organic cosubstrate to being out of consideration for metabolic strategy.
authors.affiliation: Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, PR China.
authors.forename: Xiyang
authors.initials: X
authors.lastname: Dong
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhang
authors.forename: Jiti
authors.initials: J
authors.lastname: Zhou
authors.forename: Mingxiang
authors.initials: M
authors.lastname: Chen
authors.forename: Xiaojun
authors.initials: X
authors.lastname: Wang
authors.forename: Zhuang
authors.initials: Z
authors.lastname: Shi
mesh_terms: D001673:Biodegradation, Environmental; D004492:Edetic Acid / Q000378:metabolism* / Q000494:pharmacology; D005290:Ferric Compounds / Q000378:metabolism; D005296:Ferrous Compounds / Q000378:metabolism* / Q000494:pharmacology; D005947:Glucose / Q000494:pharmacology; D007501:Iron / Q000378:metabolism*; D008969:Molecular Sequence Data; D009566:Nitrates / Q000378:metabolism*; D009569:Nitric Oxide / Q000378:metabolism*; D010084:Oxidation-Reduction / Q000187:drug effects; D010230:Paracoccus / Q000187:drug effects / Q000378:metabolism* / Q000648:ultrastructure
chemical_list: D005290:Ferric Compounds; D005296:Ferrous Compounds; D009566:Nitrates; C055526:Fe(II)-EDTA; D009569:Nitric Oxide; D004492:Edetic Acid; D007501:Iron; D005947:Glucose; C019179:Fe(III)-EDTA