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Title: Trace Metal Imaging of Sulfate-Reducing Bacteria and Methanogenic Archaea at Single-Cell Resolution by Synchrotron X-Ray Fluorescence Imaging

Journal Article · · Geomicrobiology Journal

Metal cofactors are required for many enzymes in anaerobic microbial respiration. This paper examined iron, cobalt, nickel, copper, and zinc in cellular and abiotic phases at the single-cell scale for a sulfate-reducing bacterium (Desulfococcus multivorans) and a methanogenic archaeon (Methanosarcina acetivorans) using synchrotron X-ray fluorescence microscopy. Relative abundances of cellular metals were also measured by inductively coupled plasma mass spectrometry. Finally, for both species, zinc and iron were consistently the most abundant cellular metals. M. acetivorans contained higher nickel and cobalt content than D. multivorans, likely due to elevated metal requirements for methylotrophic methanogenesis. Cocultures contained spheroid zinc sulfides and cobalt/copper sulfides.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States); California Institute of Technology (CalTech), Pasadena, CA (United States); Georgia Institute of Technology, Atlanta, GA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER); National Aeronautics and Space Administration (NASA); National Science Foundation (NSF); Michigan Economic Development Corporation (United States); Michigan Technology Tri-Corridor (United States)
Grant/Contract Number:
AC02-06CH11357; SC0004949; NNX14AJ87G; OCE-0939564; 085P1000817
OSTI ID:
1461422
Journal Information:
Geomicrobiology Journal, Vol. 35, Issue 1; ISSN 0149-0451
Publisher:
Taylor & FrancisCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 9 works
Citation information provided by
Web of Science

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Figures / Tables (6)