Molecular analysis of methanogen populations and their interactions within anaerobic sludge digesters
| Autor: | Sonda Guermazi-Toumi, Rakia Chouari, Abdelghani Sghir |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Lineage (evolution)
0208 environmental biotechnology Population Zoology Methanobacteriales 02 engineering and technology 010501 environmental sciences 01 natural sciences Bioreactors RNA Ribosomal 16S Environmental Chemistry Anaerobiosis education Waste Management and Disposal Phylogeny 0105 earth and related environmental sciences Water Science and Technology education.field_of_study Sewage biology Sequence Analysis DNA General Medicine biology.organism_classification 16S ribosomal RNA Archaea Methanogen 020801 environmental engineering Methanosarcinales Methanomicrobiales Methane |
| Zdroj: | Environmental Technology. 40:2864-2879 |
| ISSN: | 1479-487X 0959-3330 |
| DOI: | 10.1080/09593330.2018.1455747 |
| Popis: | Knowledge of archaeal population structure, function and interactions is of great interest for a deeper understanding of the anaerobic digestion step in wastewater treatment process, that represents a bottle neck in the optimization of digesters performance. Although culture-independent techniques have enabled the exploration of archaeal population in such systems, their population dynamics and interactions still require further investigation. In the present study, 2646 almost full archaeal 16S rRNA gene sequences retrieved from 22 anaerobic digesters located worldwide were analyzed and classified into 83 Operational Taxonomic Units (OTUs) for Euryarchaeotes and 2 OTUs for Crenarchaeotes. Among the Euryarchaeotes, Methanosarcinales represent the predominant archaeal population (47.5% of total sequences), followed by the ARC I (WSA2) lineage (25.3%), Methanomicrobiales (19.9%) and Methanobacteriales (1.9%). Theses lineages are predominant in nine, five, two and one digesters respectively. However, the remaining 5 digesters show no predominance of any methanogenic group. According to the predominance of theses lineages, 5 digester profiles were distinguished. This study revealed a clear interaction between the 4 methanogenic lineages. A core of 12 OTUs represented by five, four, two and one OTU for Methanosarcinales, Methanomicrobiales, ARC I and Methanobacteriales respectively were quantitatively abundant in at least 50% of the analyzed digesters. 16S rRNA targeted hybridization oligonucleotide probes targeting the predominant OTUs are being developed to follow their population dynamics under various parameters. |
| Databáze: | OpenAIRE |
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