Sunlight Effects on the Osmotrophic Uptake of DMSP-Sulfur and Leucine by Polar Phytoplankton
14 pages, 8 figures, 4 tables
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | artículo biblioteca |
| Language: | English |
| Published: |
Public Library of Science
2012-09-19
|
| Online Access: | http://hdl.handle.net/10261/59885 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| id |
dig-icm-es-10261-59885 |
|---|---|
| record_format |
koha |
| spelling |
dig-icm-es-10261-598852021-12-28T15:58:29Z Sunlight Effects on the Osmotrophic Uptake of DMSP-Sulfur and Leucine by Polar Phytoplankton Ruiz-González, Clara Galí, Martí Sintes, Eva Herndl, Gerhard J. Gasol, Josep M. Simó, Rafel 14 pages, 8 figures, 4 tables Even though the uptake and assimilation of organic compounds by phytoplankton has been long recognized, very little is still known about its potential ecological role in natural marine communities and whether it varies depending on the light regimes the algae experience. We combined measurements of size-fractionated assimilation of trace additions of 3H-leucine and 35S-dimethylsulfoniopropionate (DMSP) with microautoradiography to assess the extent and relevance of osmoheterotrophy in summer phytoplankton assemblages from Arctic and Antarctic waters, and the role of solar radiation on it was further investigated by exposing samples to different radiation spectra. Significant assimilation of both substrates occurred in the size fraction containing most phytoplankton (>5 µm), sunlight exposure generally increasing 35S-DMSP-sulfur assimilation and decreasing 3H-leucine assimilation. Microautoradiography revealed that the capacity to take up both organic substrates seemed widespread among different polar algal phyla, particularly in pennate and centric diatoms, and photosynthetic dinoflagellates. Image analysis of the microautoradiograms showed for the first time interspecific variability in the uptakes of 35S-DMSP and 3H-leucine by phytoplankton depending on the solar spectrum. Overall, these results suggest that the role of polar phytoplankton in the utilization of labile dissolved organic matter may be significant under certain conditions and further confirm the relevance of solar radiation in regulating heterotrophy in the pelagic ocean This study was supported by the Spanish Ministry of Science and Innovation through a PhD studentship to Clara Ruiz-González and through the projects ATOS (POL2006-00550/CTM), MODIVUS (CTM2005-04795/MAR) and SUMMER (CTM2008-03309/MAR). The funders only provided funding after recommendation by a peer review panel. They had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript Peer reviewed 2012-11-09T09:09:42Z 2012-11-09T09:09:42Z 2012-09-19 artículo http://purl.org/coar/resource_type/c_6501 PLoS ONE 7(9): e45545 1932-6203 http://hdl.handle.net/10261/59885 10.1371/journal.pone.0045545 1932-6203 23029084 en Publisher’s version https://doi.org/10.1371/journal.pone.0045545 open Public Library of Science |
| institution |
ICM ES |
| collection |
DSpace |
| country |
España |
| countrycode |
ES |
| component |
Bibliográfico |
| access |
En linea |
| databasecode |
dig-icm-es |
| tag |
biblioteca |
| region |
Europa del Sur |
| libraryname |
Biblioteca del ICM España |
| language |
English |
| description |
14 pages, 8 figures, 4 tables |
| format |
artículo |
| author |
Ruiz-González, Clara Galí, Martí Sintes, Eva Herndl, Gerhard J. Gasol, Josep M. Simó, Rafel |
| spellingShingle |
Ruiz-González, Clara Galí, Martí Sintes, Eva Herndl, Gerhard J. Gasol, Josep M. Simó, Rafel Sunlight Effects on the Osmotrophic Uptake of DMSP-Sulfur and Leucine by Polar Phytoplankton |
| author_facet |
Ruiz-González, Clara Galí, Martí Sintes, Eva Herndl, Gerhard J. Gasol, Josep M. Simó, Rafel |
| author_sort |
Ruiz-González, Clara |
| title |
Sunlight Effects on the Osmotrophic Uptake of DMSP-Sulfur and Leucine by Polar Phytoplankton |
| title_short |
Sunlight Effects on the Osmotrophic Uptake of DMSP-Sulfur and Leucine by Polar Phytoplankton |
| title_full |
Sunlight Effects on the Osmotrophic Uptake of DMSP-Sulfur and Leucine by Polar Phytoplankton |
| title_fullStr |
Sunlight Effects on the Osmotrophic Uptake of DMSP-Sulfur and Leucine by Polar Phytoplankton |
| title_full_unstemmed |
Sunlight Effects on the Osmotrophic Uptake of DMSP-Sulfur and Leucine by Polar Phytoplankton |
| title_sort |
sunlight effects on the osmotrophic uptake of dmsp-sulfur and leucine by polar phytoplankton |
| publisher |
Public Library of Science |
| publishDate |
2012-09-19 |
| url |
http://hdl.handle.net/10261/59885 |
| work_keys_str_mv |
AT ruizgonzalezclara sunlighteffectsontheosmotrophicuptakeofdmspsulfurandleucinebypolarphytoplankton AT galimarti sunlighteffectsontheosmotrophicuptakeofdmspsulfurandleucinebypolarphytoplankton AT sinteseva sunlighteffectsontheosmotrophicuptakeofdmspsulfurandleucinebypolarphytoplankton AT herndlgerhardj sunlighteffectsontheosmotrophicuptakeofdmspsulfurandleucinebypolarphytoplankton AT gasoljosepm sunlighteffectsontheosmotrophicuptakeofdmspsulfurandleucinebypolarphytoplankton AT simorafel sunlighteffectsontheosmotrophicuptakeofdmspsulfurandleucinebypolarphytoplankton |
| _version_ |
1777665874567626752 |