Cryptic Cycling of Complexes Containing Fe(III) and Organic Matter by Phototrophic Fe(II)-Oxidizing Bacteria

Applied and Environmental Microbiology
Chao PengAndreas Kappler

Abstract

Fe-organic matter (Fe-OM) complexes are abundant in the environment and, due to their mobility, reactivity, and bioavailability, play a significant role in the biogeochemical Fe cycle. In photic zones of aquatic environments, Fe-OM complexes can potentially be reduced and oxidized, and thus cycled, by light-dependent processes, including abiotic photoreduction of Fe(III)-OM complexes and microbial oxidation of Fe(II)-OM complexes, by anoxygenic phototrophic bacteria. This could lead to a cryptic iron cycle in which continuous oxidation and rereduction of Fe could result in a low and steady-state Fe(II) concentration despite rapid Fe turnover. However, the coupling of these processes has never been demonstrated experimentally. In this study, we grew a model anoxygenic phototrophic Fe(II) oxidizer, Rhodobacter ferrooxidans SW2, with either citrate, Fe(II)-citrate, or Fe(III)-citrate. We found that strain SW2 was capable of reoxidizing Fe(II)-citrate produced by photochemical reduction of Fe(III)-citrate, which kept the dissolved Fe(II)-citrate concentration at low (<10 μM) and stable concentrations, with a concomitant increase in cell numbers. Cell suspension incubations with strain SW2 showed that it can also oxidize Fe(II)-EDTA...Continue Reading

References

Dec 1, 1994·Applied and Environmental Microbiology·A Ehrenreich, F Widdel
Feb 26, 2000·Science·J S MartinezA Butler
Jan 17, 2002·Journal of the American Chemical Society·Katherine BarbeauAlison Butler
Jun 23, 2006·Journal of Biological Inorganic Chemistry : JBIC : a Publication of the Society of Biological Inorganic Chemistry·Jessica D MartinAlison Butler
Sep 14, 2006·Photochemistry and Photobiology·Katherine Barbeau
Aug 19, 2007·Applied and Environmental Microbiology·Nicky C CaiazzaDianne K Newman
Sep 25, 2008·FEMS Microbiology Ecology·Florian HeglerAndreas Kappler
Jul 14, 2009·Applied and Environmental Microbiology·Jennyfer MiotGuillaume Morin
Sep 24, 2009·Chemical Reviews·Moriah Sandy, Alison Butler
Dec 17, 2009·Environmental Science & Technology·Thomas BorchKate Campbell
Nov 13, 2010·Science·Don E CanfieldOsvaldo Ulloa
Dec 15, 2010·Environmental Science & Technology·Prasesh SharmaAndreas Kappler
May 23, 2013·Environmental Science & Technology·Elisabeth NeubauerThilo Hofmann
Oct 21, 2014·Nature Reviews. Microbiology·Emily D MeltonAndreas Kappler
Dec 31, 2014·Proceedings of the National Academy of Sciences of the United States of America·Bryndan P DurhamMary Ann Moran
Sep 9, 2015·Scientific Reports·Marc LlirósSean A Crowe
Nov 26, 2015·Nature·Johannes Lehmann, Markus Kleber
Mar 5, 2016·Journal of Colloid and Interface Science·Charlotte CatrouilletGérard Gruau
Aug 31, 2016·Nature Reviews. Microbiology·Liang ShiJames K Fredrickson
Oct 22, 2016·Environmental Microbiology·Jasmine S BergMarcel M M Kuypers
Feb 9, 2017·Environmental Microbiology·Andreas Kappler, Casey Bryce
Jun 13, 2017·Environmental Science & Technology·Yong-Guan ZhuAndrew A Meharg
Aug 2, 2017·Biochimica Et Biophysica Acta. Bioenergetics·Luis PereiraCarlos Frazão
Oct 11, 2017·Environmental Science & Technology·Peng LiaoDaniel E Giammar
Jul 31, 2018·Environmental Microbiology·Casey BryceAndreas Kappler

❮ Previous
Next ❯

Citations

Feb 28, 2021·Journal of Environmental Sciences (China)·Zhao-Feng YuanZheng Chen
Feb 27, 2021·Frontiers in Microbiology·Ilenne Del ValleLauren B Stadler
Jun 11, 2021·Environmental Science & Technology·Nanqing ZhouClara S Chan
Jun 19, 2021·Chemical Reviews·Jianzhi HuangHuichun Zhang
Aug 28, 2020·Environmental Science & Technology·Simin ZhaoHailiang Dong
Dec 31, 2019·Environmental Science & Technology·Ulf LuederCaroline Schmidt
Feb 18, 2020·Environmental Science & Technology·Ulf LuederCaroline Schmidt

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.