Changes in bacterial community structure and humic acid composition in response to enhanced extracellular electron transfer process in coastal sediment
Humic acids are one of the main organic matters in sediments and contribute importantly to the marine biogeochemical cycles. Extracellular electron transfer is a ubiquitous natural process and has potentials to change the macrostructure of humic acids which can act as an electron shuttle. By setting up marine sediment microbial fuel cells, the present study revealed that enhanced extracellular electron transfer process could increase the content of C and H, but decrease the O content in humic acids, which could result in an increased aromaticity and decreased polarity of humic acids, whereas no significant changes occurred to the humification degree of the humic acids. Specific bacterial groups as potential exoelectrogens including Proteobacteria (especially Pseudomonas strains) and Firmicutes were enriched under enhanced extracellular electron transfer process, indicating that they were active to exchange electrons and might play important roles during the changes of humic acids, while the relative abundance of Verrucomicrobia and Bacteroidetes was reduced during these processes. The results of the present research shed lights on the relation between exoelectrogens and the transformation of humic acids in coastal sediment, while the microbial process and mechanisms behind it require further study.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2019 |
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| Erschienen: |
2019 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:201 |
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| Enthalten in: |
Archives of microbiology - 201(2019), 7 vom: 16. Sept., Seite 897-906 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Zhao, Jiulong [VerfasserIn] |
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| Links: |
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| Themen: |
Bacterial community structure |
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| Anmerkungen: |
Date Completed 21.10.2019 Date Revised 22.10.2019 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1007/s00203-019-01659-3 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM29614052X |
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| 245 | 1 | 0 | |a Changes in bacterial community structure and humic acid composition in response to enhanced extracellular electron transfer process in coastal sediment |
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| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a Humic acids are one of the main organic matters in sediments and contribute importantly to the marine biogeochemical cycles. Extracellular electron transfer is a ubiquitous natural process and has potentials to change the macrostructure of humic acids which can act as an electron shuttle. By setting up marine sediment microbial fuel cells, the present study revealed that enhanced extracellular electron transfer process could increase the content of C and H, but decrease the O content in humic acids, which could result in an increased aromaticity and decreased polarity of humic acids, whereas no significant changes occurred to the humification degree of the humic acids. Specific bacterial groups as potential exoelectrogens including Proteobacteria (especially Pseudomonas strains) and Firmicutes were enriched under enhanced extracellular electron transfer process, indicating that they were active to exchange electrons and might play important roles during the changes of humic acids, while the relative abundance of Verrucomicrobia and Bacteroidetes was reduced during these processes. The results of the present research shed lights on the relation between exoelectrogens and the transformation of humic acids in coastal sediment, while the microbial process and mechanisms behind it require further study | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Bacterial community structure | |
| 650 | 4 | |a Exoelectrogens | |
| 650 | 4 | |a Extracellular electron transfer | |
| 650 | 4 | |a Humic acids | |
| 650 | 4 | |a Sediment microbial fuel cell | |
| 650 | 7 | |a Humic Substances |2 NLM | |
| 700 | 1 | |a Wang, Long |e verfasserin |4 aut | |
| 700 | 1 | |a Tang, Lili |e verfasserin |4 aut | |
| 700 | 1 | |a Ren, Rui |e verfasserin |4 aut | |
| 700 | 1 | |a You, Wuxin |e verfasserin |4 aut | |
| 700 | 1 | |a Farooq, Robina |e verfasserin |4 aut | |
| 700 | 1 | |a Wang, Zejie |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Yongyu |e verfasserin |4 aut | |
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