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The Role of Enriched Microbial Consortium on Iron-Reducing Bioaugmentation in Sediments

Microbial iron reduction is an important biogeochemical process and involved in various engineered processes, including the traditional clay dyeing processes. Bioaugmentation with iron reducing bacteria (IRB) is generally considered as an effective method to enhance the activity of iron reduction. H...

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Autores principales: Pan, Yuanyuan, Yang, Xunan, Xu, Meiying, Sun, Guoping
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5357831/
https://www.ncbi.nlm.nih.gov/pubmed/28373869
http://dx.doi.org/10.3389/fmicb.2017.00462
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author Pan, Yuanyuan
Yang, Xunan
Xu, Meiying
Sun, Guoping
author_facet Pan, Yuanyuan
Yang, Xunan
Xu, Meiying
Sun, Guoping
author_sort Pan, Yuanyuan
collection PubMed
description Microbial iron reduction is an important biogeochemical process and involved in various engineered processes, including the traditional clay dyeing processes. Bioaugmentation with iron reducing bacteria (IRB) is generally considered as an effective method to enhance the activity of iron reduction. However, limited information is available about the role of IRB on bioaugmentation. To reveal the roles of introduced IRB on bioaugmentation, an IRB consortium enriched with ferric citrate was inoculated into three Fe(II)-poor sediments which served as the pigments for Gambiered Guangdong silk dyeing. After bioaugmentation, the dyeabilities of all sediments met the demands of Gambiered Guangdong silk through increasing the concentration of key agent [precipitated Fe(II)] by 35, 27, and 61%, respectively. The microbial community analysis revealed that it was the minor species but not the dominant ones in the IRB consortium that promoted the activity of iron reduction. Meanwhile, some indigenous bacteria with the potential of iron reduction, such as Clostridium, Anaeromyxobacter, Bacillus, Pseudomonas, Geothrix, and Acinetobacter, were also stimulated to form mutualistic interaction with introduced consortium. Interestingly, the same initial IRB consortium led to the different community successions among the three sediments and there was even no common genus increasing or decreasing synchronously among the potential IRB of all bioaugmented sediments. The Mantel and canonical correspondence analysis showed that different physiochemical properties of sediments influenced the microbial community structures. This study not only provides a novel bioremediation method for obtaining usable sediments for dyeing Gambiered Guangdong silk, but also contributes to understanding the microbial response to IRB bioaugmentation.
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spelling pubmed-53578312017-04-03 The Role of Enriched Microbial Consortium on Iron-Reducing Bioaugmentation in Sediments Pan, Yuanyuan Yang, Xunan Xu, Meiying Sun, Guoping Front Microbiol Microbiology Microbial iron reduction is an important biogeochemical process and involved in various engineered processes, including the traditional clay dyeing processes. Bioaugmentation with iron reducing bacteria (IRB) is generally considered as an effective method to enhance the activity of iron reduction. However, limited information is available about the role of IRB on bioaugmentation. To reveal the roles of introduced IRB on bioaugmentation, an IRB consortium enriched with ferric citrate was inoculated into three Fe(II)-poor sediments which served as the pigments for Gambiered Guangdong silk dyeing. After bioaugmentation, the dyeabilities of all sediments met the demands of Gambiered Guangdong silk through increasing the concentration of key agent [precipitated Fe(II)] by 35, 27, and 61%, respectively. The microbial community analysis revealed that it was the minor species but not the dominant ones in the IRB consortium that promoted the activity of iron reduction. Meanwhile, some indigenous bacteria with the potential of iron reduction, such as Clostridium, Anaeromyxobacter, Bacillus, Pseudomonas, Geothrix, and Acinetobacter, were also stimulated to form mutualistic interaction with introduced consortium. Interestingly, the same initial IRB consortium led to the different community successions among the three sediments and there was even no common genus increasing or decreasing synchronously among the potential IRB of all bioaugmented sediments. The Mantel and canonical correspondence analysis showed that different physiochemical properties of sediments influenced the microbial community structures. This study not only provides a novel bioremediation method for obtaining usable sediments for dyeing Gambiered Guangdong silk, but also contributes to understanding the microbial response to IRB bioaugmentation. Frontiers Media S.A. 2017-03-20 /pmc/articles/PMC5357831/ /pubmed/28373869 http://dx.doi.org/10.3389/fmicb.2017.00462 Text en Copyright © 2017 Pan, Yang, Xu and Sun. 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) or licensor 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
Pan, Yuanyuan
Yang, Xunan
Xu, Meiying
Sun, Guoping
The Role of Enriched Microbial Consortium on Iron-Reducing Bioaugmentation in Sediments
title The Role of Enriched Microbial Consortium on Iron-Reducing Bioaugmentation in Sediments
title_full The Role of Enriched Microbial Consortium on Iron-Reducing Bioaugmentation in Sediments
title_fullStr The Role of Enriched Microbial Consortium on Iron-Reducing Bioaugmentation in Sediments
title_full_unstemmed The Role of Enriched Microbial Consortium on Iron-Reducing Bioaugmentation in Sediments
title_short The Role of Enriched Microbial Consortium on Iron-Reducing Bioaugmentation in Sediments
title_sort role of enriched microbial consortium on iron-reducing bioaugmentation in sediments
topic Microbiology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5357831/
https://www.ncbi.nlm.nih.gov/pubmed/28373869
http://dx.doi.org/10.3389/fmicb.2017.00462
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