English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/16131
Compartir / Impacto:
Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL

Number and phylogenetic affiliation of bacteria assimilating dimethylsulfoniopropionate and leucine in the ice-covered coastal Arctic Ocean

AutorVila-Costa, Maria ; Simó, Rafel ; Alonso-Sáez, Laura ; Pedrós-Alió, Carlos
Palabras claveBacteria
Beaufort Sea
Franklin Bay
Arctic winter
Fecha de publicación1-dic-2008
CitaciónJournal of Marine Systems 74(3-4): 957-963 (2008)
ResumenThe ability of bacteria to assimilate sulfur from dimethylsulfoniopropionate (DMSP) was examined in the western Arctic Ocean by combining microautoradiography and fluorescence in situ hybridization (FISH). Assimilation of leucine was also measured for comparative purposes since leucine is considered a universal substrate for bacteria, which use it for protein synthesis. Samples were collected at 3 m depth, through a hole in the ice, in the CASES (Canadian Arctic Shelf Ecosystem Study) overwintering station in Franklin Bay (eastern Beaufort Sea) in March and May 2004 to compare two contrasting situations: winter and early spring. FISH counts indicated that the bacterial assemblage consisted of α- (up to 60% of the EUB positive cells), β- (up to 10%) and γ-proteobacteria (around 20%), and Bacteroidetes (up to 60%). The β-proteobacteria were not active with any of the two substrates tested. The remaining groups were much less efficient at assimilating DMSP-sulfur (5% of the cells) than leucine (20–35%) both in winter and in spring. Only the Roseobacter group of α-proteobacteria showed a similar assimilation of both substrates.
Descripción7 pages, 5 figures, 1 table.-- Available online Oct 24, 2007.-- Issue title: "Sea ice and life in a river-influenced arctic shelf ecosystem".
Full-text version available Open Acces at: http://www.icm.csic.es/bio/projects/icmicrobis/pdf
Versión del editorhttp://dx.doi.org/10.1016/j.jmarsys.2007.10.006
Aparece en las colecciones: (ICM) Artículos
Ficheros en este ítem:
No hay ficheros asociados a este ítem.
Mostrar el registro completo

NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.