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http://hdl.handle.net/10261/19216
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Campo DC | Valor | Lengua/Idioma |
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dc.contributor.author | Salo, Violeta | - |
dc.contributor.author | Simó, Rafel | - |
dc.contributor.author | Vila-Costa, Maria | - |
dc.contributor.author | Calbet, Albert | - |
dc.date.accessioned | 2009-12-01T12:37:02Z | - |
dc.date.available | 2009-12-01T12:37:02Z | - |
dc.date.issued | 2009-12 | - |
dc.identifier.citation | Environmental Microbiology 11(12): 3063-3072 (2009) | en_US |
dc.identifier.issn | 1462-2912 | - |
dc.identifier.uri | http://hdl.handle.net/10261/19216 | - |
dc.description | 10 pages, 6 figures, 1 table | en_US |
dc.description.abstract | A laboratory grazing experiment was conducted with the aim of quantifying the sulfur assimilation by a herbivore protist feeding on a dimethylsulfoniopropionate (DMSP)-containing phytoplankter. When supplied with dissolved 35S-DMSP, cultures of an axenic strain of the diatom Thalassiosira pseudonana took up 60–95% of the added radioisotope and accumulated it untransformed in the cytoplasm. Radiolabelled diatom cells were offered as prey to the heterotrophic dinoflagellate Oxyrrhis marina. After 32 h in the dark, all the prey had been grazed and digested, leaving only radiolabelled O. marina in the grazing bottles and thus providing an estimate of the percentage of DMSP-sulfur retained by the predator. Subsequent precipitation with cold trichloroacetic acid (TCA) provided the fraction of retained DMSP-S that had been assimilated into the micrograzer macromolecules. In parallel incubations with predator and dissolved 35S-DMSP only (no prey), O. marina (and their closely associated bacteria) took up the radiolabelled substrate osmotrophically to an activity of 0.04 dpm cell−1 and assimilated it all into macromolecules. By correcting grazing 35S-DMSP assimilation for osmotrophic 35S-DMSP assimilation, and comparing it with the ingested radioisotope, the percentage of ingested DMSP-sulfur retained and assimilated by the predator was determined to be 32 ± 4%. This is the first study that provides direct evidence that ingestion of a DMSP-containing prey supplies structural sulfur to a herbivore protist and that quantifies this assimilative supply at one-third of ingested DMSP | en_US |
dc.description.sponsorship | We acknowledge support from the Spanish Ministry of Education and Science through a PhD fellowship to V.S. and through the project MICROROL (Role of microzooplankton in the dynamics of pelagic marine food webs; CTM2004-02575/MAR) | en_US |
dc.format.extent | 8985 bytes | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | en_US |
dc.publisher | Wiley-Blackwell | en_US |
dc.rights | closedAccess | en_US |
dc.title | Sulfur assimilation by Oxyrrhis marina feeding on a 35S-DMSP-labelled prey | en_US |
dc.type | artículo | en_US |
dc.identifier.doi | 10.1111/j.1462-2920.2009.02011.x | - |
dc.description.peerreviewed | Peer reviewed | en_US |
dc.relation.publisherversion | https://doi.org/10.1111/j.1462-2920.2009.02011.x | en_US |
dc.type.coar | http://purl.org/coar/resource_type/c_6501 | es_ES |
item.openairetype | artículo | - |
item.grantfulltext | none | - |
item.cerifentitytype | Publications | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | No Fulltext | - |
item.languageiso639-1 | en | - |
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