Cargando…

Temperature Controls Crystalline Iron Oxide Utilization by Microbial Communities in Methanic Ferruginous Marine Sediment Incubations

Microorganisms can use crystalline iron minerals for iron reduction linked to organic matter degradation or as conduits for direct interspecies electron transfer (mDIET) to syntrophic partners, e.g., methanogens. The environmental conditions that lead either to reduction or conduit use are so far un...

Descripción completa

Detalles Bibliográficos
Autores principales: Aromokeye, David A., Richter-Heitmann, Tim, Oni, Oluwatobi E., Kulkarni, Ajinkya, Yin, Xiuran, Kasten, Sabine, Friedrich, Michael W.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6218420/
https://www.ncbi.nlm.nih.gov/pubmed/30425692
http://dx.doi.org/10.3389/fmicb.2018.02574
_version_ 1783368446176657408
author Aromokeye, David A.
Richter-Heitmann, Tim
Oni, Oluwatobi E.
Kulkarni, Ajinkya
Yin, Xiuran
Kasten, Sabine
Friedrich, Michael W.
author_facet Aromokeye, David A.
Richter-Heitmann, Tim
Oni, Oluwatobi E.
Kulkarni, Ajinkya
Yin, Xiuran
Kasten, Sabine
Friedrich, Michael W.
author_sort Aromokeye, David A.
collection PubMed
description Microorganisms can use crystalline iron minerals for iron reduction linked to organic matter degradation or as conduits for direct interspecies electron transfer (mDIET) to syntrophic partners, e.g., methanogens. The environmental conditions that lead either to reduction or conduit use are so far unknown. We investigated microbial community shifts and interactions with crystalline iron minerals (hematite and magnetite) in methanic ferruginous marine sediment incubations during organic matter (glucose) degradation at varying temperatures. Iron reduction rates increased with decreasing temperature from 30°C to 4°C. Both hematite and magnetite facilitated iron reduction at 4°C, demonstrating that microorganisms in the methanic zone of marine sediments can reduce crystalline iron oxides under psychrophilic conditions. Methanogenesis occurred, however, at higher rates with increasing temperature. At 30°C, both hematite and magnetite accelerated methanogenesis onset and maximum process rates. At lower temperatures (10°C and 4°C), hematite could still facilitate methanogenesis but magnetite served more as an electron acceptor for iron reduction than as a conduit. Different temperatures selected for different key microorganisms: at 30°C, members of genus Orenia, Halobacteroidaceae, at 10°C, Photobacterium and the order Clostridiales, and at 4°C Photobacterium and Psychromonas were enriched. Members of the order Desulfuromonadales harboring known dissimilatory iron reducers were also enriched at all temperatures. Our results show that crystalline iron oxides predominant in some natural environments can facilitate electron transfer between microbial communities at psychrophilic temperatures. Furthermore, temperature has a critical role in determining the pathway of crystalline iron oxide utilization in marine sediment shifting from conduction at 30°C to predominantly iron reduction at lower temperatures.
format Online
Article
Text
id pubmed-6218420
institution National Center for Biotechnology Information
language English
publishDate 2018
publisher Frontiers Media S.A.
record_format MEDLINE/PubMed
spelling pubmed-62184202018-11-13 Temperature Controls Crystalline Iron Oxide Utilization by Microbial Communities in Methanic Ferruginous Marine Sediment Incubations Aromokeye, David A. Richter-Heitmann, Tim Oni, Oluwatobi E. Kulkarni, Ajinkya Yin, Xiuran Kasten, Sabine Friedrich, Michael W. Front Microbiol Microbiology Microorganisms can use crystalline iron minerals for iron reduction linked to organic matter degradation or as conduits for direct interspecies electron transfer (mDIET) to syntrophic partners, e.g., methanogens. The environmental conditions that lead either to reduction or conduit use are so far unknown. We investigated microbial community shifts and interactions with crystalline iron minerals (hematite and magnetite) in methanic ferruginous marine sediment incubations during organic matter (glucose) degradation at varying temperatures. Iron reduction rates increased with decreasing temperature from 30°C to 4°C. Both hematite and magnetite facilitated iron reduction at 4°C, demonstrating that microorganisms in the methanic zone of marine sediments can reduce crystalline iron oxides under psychrophilic conditions. Methanogenesis occurred, however, at higher rates with increasing temperature. At 30°C, both hematite and magnetite accelerated methanogenesis onset and maximum process rates. At lower temperatures (10°C and 4°C), hematite could still facilitate methanogenesis but magnetite served more as an electron acceptor for iron reduction than as a conduit. Different temperatures selected for different key microorganisms: at 30°C, members of genus Orenia, Halobacteroidaceae, at 10°C, Photobacterium and the order Clostridiales, and at 4°C Photobacterium and Psychromonas were enriched. Members of the order Desulfuromonadales harboring known dissimilatory iron reducers were also enriched at all temperatures. Our results show that crystalline iron oxides predominant in some natural environments can facilitate electron transfer between microbial communities at psychrophilic temperatures. Furthermore, temperature has a critical role in determining the pathway of crystalline iron oxide utilization in marine sediment shifting from conduction at 30°C to predominantly iron reduction at lower temperatures. Frontiers Media S.A. 2018-10-30 /pmc/articles/PMC6218420/ /pubmed/30425692 http://dx.doi.org/10.3389/fmicb.2018.02574 Text en Copyright © 2018 Aromokeye, Richter-Heitmann, Oni, Kulkarni, Yin, Kasten and Friedrich. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Microbiology
Aromokeye, David A.
Richter-Heitmann, Tim
Oni, Oluwatobi E.
Kulkarni, Ajinkya
Yin, Xiuran
Kasten, Sabine
Friedrich, Michael W.
Temperature Controls Crystalline Iron Oxide Utilization by Microbial Communities in Methanic Ferruginous Marine Sediment Incubations
title Temperature Controls Crystalline Iron Oxide Utilization by Microbial Communities in Methanic Ferruginous Marine Sediment Incubations
title_full Temperature Controls Crystalline Iron Oxide Utilization by Microbial Communities in Methanic Ferruginous Marine Sediment Incubations
title_fullStr Temperature Controls Crystalline Iron Oxide Utilization by Microbial Communities in Methanic Ferruginous Marine Sediment Incubations
title_full_unstemmed Temperature Controls Crystalline Iron Oxide Utilization by Microbial Communities in Methanic Ferruginous Marine Sediment Incubations
title_short Temperature Controls Crystalline Iron Oxide Utilization by Microbial Communities in Methanic Ferruginous Marine Sediment Incubations
title_sort temperature controls crystalline iron oxide utilization by microbial communities in methanic ferruginous marine sediment incubations
topic Microbiology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6218420/
https://www.ncbi.nlm.nih.gov/pubmed/30425692
http://dx.doi.org/10.3389/fmicb.2018.02574
work_keys_str_mv AT aromokeyedavida temperaturecontrolscrystallineironoxideutilizationbymicrobialcommunitiesinmethanicferruginousmarinesedimentincubations
AT richterheitmanntim temperaturecontrolscrystallineironoxideutilizationbymicrobialcommunitiesinmethanicferruginousmarinesedimentincubations
AT onioluwatobie temperaturecontrolscrystallineironoxideutilizationbymicrobialcommunitiesinmethanicferruginousmarinesedimentincubations
AT kulkarniajinkya temperaturecontrolscrystallineironoxideutilizationbymicrobialcommunitiesinmethanicferruginousmarinesedimentincubations
AT yinxiuran temperaturecontrolscrystallineironoxideutilizationbymicrobialcommunitiesinmethanicferruginousmarinesedimentincubations
AT kastensabine temperaturecontrolscrystallineironoxideutilizationbymicrobialcommunitiesinmethanicferruginousmarinesedimentincubations
AT friedrichmichaelw temperaturecontrolscrystallineironoxideutilizationbymicrobialcommunitiesinmethanicferruginousmarinesedimentincubations