Document Detail

Screening of anaerobic activities in sediments of an acidic environment: Tinto River.
MedLine Citation:
PMID:  22956355     Owner:  NLM     Status:  Publisher    
The Tinto River (Huelva, Spain) is a natural acidic rock drainage environment produced by the bio-oxidation of metallic sulfides from the Iberian Pyritic Belt. A geomicrobiological model of the different microbial cycles operating in the sediments was recently developed through molecular biological methods, suggesting the presence of iron reducers, methanogens, nitrate reducers and hydrogen producers. In this study, we used a combination of molecular biological methods and targeted enrichment incubations to validate this model and prove the existence of those potential anaerobic activities in the acidic sediments of Tinto River. Methanogenic, sulfate-reducing, denitrifying and hydrogen-producing enrichments were all positive at pH between 5 and 7. Methanogenic enrichments revealed the presence of methanogenic archaea belonging to the genera Methanosarcina and Methanobrevibacter. Enrichments for sulfate-reducing microorganisms were dominated by Desulfotomaculum spp. Denitrifying enrichments showed a broad diversity of bacteria belonging to the genera Paenibacillus, Bacillus, Sedimentibacter, Lysinibacillus, Delftia, Alcaligenes, Clostridium and Desulfitobacterium. Hydrogen-producing enrichments were dominated by Clostridium spp. These enrichments confirm the presence of anaerobic activities in the acidic sediments of the Tinto River that are normally assumed to take place exclusively at neutral pH.
Irene Sánchez-Andrea; Patricia Rojas-Ojeda; Ricardo Amils; José Luis Sanz
Related Documents :
23236415 - Targeting fatty acid binding protein (fabp) anandamide transporters - a novel strategy ...
24493245 - Control of bud inhibition in cyperus.
24200795 - Increased levels of extracellular dopamine in the nucleus accumbens and amygdala of rat...
23266215 - Dynamics and precision in retinoic acid morphogen gradients.
12495585 - Nutrient composition of rose (rosa canina l.) seed and oils.
19854335 - Diagnostic and prognostic value of uric acid in patients with acute dyspnea.
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-9-7
Journal Detail:
Title:  Extremophiles : life under extreme conditions     Volume:  -     ISSN:  1433-4909     ISO Abbreviation:  Extremophiles     Publication Date:  2012 Sep 
Date Detail:
Created Date:  2012-9-7     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9706854     Medline TA:  Extremophiles     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Departamento de Biología Molecular, Universidad Autónoma de Madrid, c/Darwin 2, C-014/021, Campus de Cantoblanco, Crtra. de Colmenar, Km. 15, 28049, Madrid, Spain,
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  A Preliminary and Qualitative Metallomics Study of Mercury in the Muscle of Fish from Amazonas, Braz...
Next Document:  A CAD interface for GEANT4.