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Título: | Prokaryotic community structure in algal photosynthetic biofilms from extreme acidic streams in Río Tinto (Huelva, Spain) |
Autor: | Souza-Egipsy, Virginia CSIC ORCID ; González-Toril, Elena CSIC ORCID; Zettler, Erik; Amaral-Zettler, Linda; Aguilera, Ángeles CSIC ORCID; Amils, Ricardo CSIC ORCID | Palabras clave: | Algal biofilms Prokaryotic community Río Tinto SEM-BSE FISH 16S rRNA |
Fecha de publicación: | dic-2008 | Editor: | Sociedad Española de Microbiología Viguera Editores |
Citación: | International Microbiology 11(4): 251-260 (2008) | Resumen: | Four algal photosynthetic biofilms were collected from the Río Tinto (SW Spain) at four localities: AG, Euglena and Pinnularia biofilms; ANG, Chlorella and Pinnularia biofilms; RI, Cyanidium and Dunaliella biofilms; and CEM, Cyanidium, Euglena and Pinnularia biofilms. Community composition and structure were studied by a polyphasic approach consisting of 16S rRNA analysis, scanning electron microscopy by back-scattered electron detection mode (SEM-BSE), and fluorescence in-situ hybridization (FISH). Acidophilic prokaryotes associated with algal photosynthetic biofilms included sequences related to the Alpha-, Beta-, and Gammaproteobacteria (phylum Proteobacteria) and to the phyla Nitrospira, Actinobacteria, Acidobacteria and Firmicutes. Sequences from the Archaea domain were also identified. No more than seven distinct lineages were detected in any biofilm, except for those from RI, which contained fewer groups of Bacteria. Prokaryotic communities of the thinnest algal photosynthetic biofilms (<100 μm) were more related to those in the water column, including Leptospirillum populations. In general, thick biofilms (>200 μm) generate microniches that could facilitate the development of less-adapted microorganisms (coming from the surrounding environment) to extreme conditions, thus resulting in a more diverse prokaryotic biofilm. | Descripción: | 10 pages, 4 figures, 3 tables.-- PMID: 19204897 [PubMed]. | Versión del editor: | http://www.im.microbios.org/1104/1104contents.pdf | URI: | http://hdl.handle.net/10261/13025 | DOI: | 10.2436/20.1501.01.69 | ISSN: | 1139-6709 | E-ISSN: | 1618-1905 |
Aparece en las colecciones: | (CAB) Artículos (CBM) Artículos |
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