 |
| Titel |
Bacterial diversity of autotrophic enriched cultures from remote, glacial Antarctic, Alpine and Andean aerosol, snow and soil samples |
| VerfasserIn |
E. González-Toril, R. Amils, R. J. Delmas, J.-R. Petit, J. Komárek, J. Elster |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1726-4170
|
| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 6, no. 1 ; Nr. 6, no. 1 (2009-01-08), S.33-44 |
| Datensatznummer |
250003313
|
| Publikation (Nr.) |
 copernicus.org/bg-6-33-2009.pdf |
|
|
|
|
|
| Zusammenfassung |
| Four different communities and one culture of autotrophic microbial
assemblages were obtained by incubation of samples collected from high
elevation snow in the Alps (Mt. Blanc area) and the Andes (Nevado Illimani
summit, Bolivia), from Antarctic aerosol (French station Dumont d'Urville)
and a maritime Antarctic soil (King George Island, South Shetlands, Uruguay
Station Artigas), in a minimal mineral (oligotrophic) media. Molecular
analysis of more than 200 16S rRNA gene sequences showed that all cultured
cells belong to the Bacteria domain. Phylogenetic comparison with the currently
available rDNA database allowed sequences belonging to Proteobacteria Alpha-, Beta- and Gamma-proteobacteria), Actinobacteria and Bacteroidetes phyla to be
identified. The Andes snow culture was the richest in bacterial diversity
(eight microorganisms identified) and the marine Antarctic soil the poorest
(only one). Snow samples from Col du Midi (Alps) and the Andes shared the
highest number of identified microorganisms (Agrobacterium, Limnobacter, Aquiflexus and two uncultured
Alphaproteobacteria clones). These two sampling sites also shared four sequences with the
Antarctic aerosol sample (Limnobacter, Pseudonocardia and an uncultured Alphaproteobacteriaclone). The only
microorganism identified in the Antarctica soil (Brevundimonas sp.) was also detected in
the Antarctic aerosol. Most of the identified microorganisms had been
detected previously in cold environments, marine sediments soils and rocks.
Air current dispersal is the best model to explain the presence of very
specific microorganisms, like those identified in this work, in environments
very distant and very different from each other. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|