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Research Topic

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The microbial sulfur cycle

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Topic Editors:

Martin G. Klotz, University of North Carolina at Charlotte, USA
Donald A. Bryant, The Pennsylvania State University, USA
Thomas E. Hanson, University of Delaware, USA

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Sulfur is the tenth most abundant element in the universe and the sixth most abundant element in microbial biomass. By virtue of its chemical properties, particularly the wide range of stable redox states, sulfur plays a critical role in central biochemistry as a structural element, redox center, and carbon carrier. In addition, redox reactions involving reduced and oxidized inorganic sulfur compounds can be utilized by microbes for the generation and conservation of biochemical energy. Microbial transformation of both inorganic and organic sulfur compounds has had a profound effect on the properties of the biosphere and continues to affect geochemistry today. For these reasons, we present here a collection of articles from the leading edge of the field of sulfur microbiology, focusing on reactions and compounds of geochemical significance.

Image: Sulfur globules produced during sulfide oxidation by Chlorobaculum tepidum imaged by scanning electron microscopy. Image courtesy of Dr. Clara Chan, Department of Geological Sciences, University of Delaware.

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