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  4. Enrichment of anaerobic heterotrophic thermophiles from four Azorean hot springs revealed different community composition and genera abundances using recalcitrant substrates
 
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Enrichment of anaerobic heterotrophic thermophiles from four Azorean hot springs revealed different community composition and genera abundances using recalcitrant substrates

Publikationstyp
Journal Article
Date Issued
2019-05-07
Sprache
English
Author(s)
Suleiman, Marcel  
Klippel, Barbara  
Busch, Philip  
Schäfers, Christian  
Moccand, Cyril  
Bel-Rhlid, Rachid  
Palzer, Stefan  
Antranikian, Garabed  
Institut
Technische Mikrobiologie V-7  
TORE-URI
http://hdl.handle.net/11420/2375
Journal
Extremophiles  
Volume
23
Issue
3
Start Page
277
End Page
281
Citation
Extremophiles : life under extreme conditions 3 (23): 277-281 (2019-05-07)
Publisher DOI
10.1007/s00792-019-01079-7
Scopus ID
2-s2.0-85061402014
DGGE analysis combined with a metagenomic approach was used to get insights into heterotrophic anoxic enrichment cultures of four hot springs of Vale das Furnas, Portugal, using the recalcitrant substrate spent coffee ground (SCG). Parallel enrichment cultures were performed using the major components of spent coffee ground, namely arabinogalactan, galactomannan, cellulose, and proteins. DGGE revealed that heterotrophic thermophilic bacteria are highly abundant in the hydrothermal springs and significant differences in community composition depending on the substrate were observed. DNA, isolated from enrichment cultures of different locations that were grown on the same substrate were pooled, and the respective metagenomes were analyzed. Results indicated that cultures grown on recalcitrant substrate SCG consists of a totally different thermophilic community, dominated by Dictyoglomus. Enrichments with galactomannan and arabinogalactan were dominated by Thermodesulfovibrio, while cultures with casein and cellulose were dominated by Thermus. This study indicates the high potential of thermophilic bacteria degrading recalcitrant substrate such as SCG and furthermore how the accessibility to complex polymers shapes the bacterial community.
Subjects
Enrichment cultures
Microbial diversity
Spent coffee ground
Thermophiles,
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