Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/15216
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dc.contributor.authorHarada, Hyakubun-
dc.contributor.authorVila-Costa, Maria-
dc.contributor.authorCebrián, Just-
dc.contributor.authorKiene, Ronald P.-
dc.date.accessioned2009-07-22T08:55:34Z-
dc.date.available2009-07-22T08:55:34Z-
dc.date.issued2009-01-
dc.identifier.citationAquatic Botany 90(1): 37-42 (2009)en_US
dc.identifier.issn0304-3770-
dc.identifier.urihttp://hdl.handle.net/10261/15216-
dc.description6 pages, 3 figuresen_US
dc.description.abstractWe tested the effects of UV radiation (UVR) and nitrate limitation on the production of dimethylsulfide (DMS), particulate dimethylsulfoniopropionate (DMSPp), and particulate dimethylsulfoxide (DMSOp) in natural seawater from the Gulf of Mexico and in phytoplankton cultures. DMS/Chl a ratios in PAR-only and PAR + UV-exposed seawater were 0.44–2.0 and 0.46–1.9 nmol DMS μg−1 Chl a, respectively, whereas the ratios in cultures of Amphidinium carterae were 1.0–2.2 nmol μg−1 in PAR-exposed samples and 0.91–2.1 nmol μg−1 in PAR + UV-exposed samples. These results suggested that UVR did not substantially affect DMS/Chl a ratios in seawater and A. carterae culture samples. Similarly, UVR had no significant effect on DMSOp/Chl a in seawater samples (0.83–1.6 nmol DMSO μg−1 Chl a for PAR + UV vs. 0.70–1.5 nmol μg−1 for PAR-exposed seawater samples, respectively) or in A. carterae cultures (0.20–1.3 and 0.19–0.88 nmol DMSO μg−1 Chl a in PAR + UV- and PAR-exposed cultures, respectively). In an experiment with the diatom, Thalassiosira oceanica, the culture was grown in high nitrate (30 μM) or low nitrate (6 μM) media and exposed to PAR-only or PAR + UV. The low nitrate, PAR-only samples showed an increase of intracellular dimethylsulfoniopropionate (DMSP) concentration from 2.1 to 15 mmol L−1 in 60 h, but the increase occurred only after cultures reached the stationary phase. Cultures of T. oceanica grown under UVR had lower growth rates than those under PAR-only (μ′ = 0.17 and 0.32 d−1, respectively) and perhaps did not experience severe nitrate limitation even in the low nitrate treatment. These results suggest that the elevated UVR in low nitrate environments could result in reduction of DMSP in some species, whereas DMSP concentrations would not be affected in eutrophic areasen_US
dc.format.extent530832 bytes-
dc.format.mimetypeapplication/pdf-
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.rightsclosedAccessen_US
dc.subjectOxidative stressen_US
dc.subjectAntioxidanten_US
dc.subjectAmphidinium carteraeen_US
dc.subjectThalassiosira oceanicaen_US
dc.titleEffects of UV radiation and nitrate limitation on the production of biogenic sulfur compounds by marine phytoplanktonen_US
dc.typeartículoen_US
dc.identifier.doi10.1016/j.aquabot.2008.05.004-
dc.description.peerreviewedPeer revieweden_US
dc.relation.publisherversionhttps://doi.org/10.1016/j.aquabot.2008.05.004en_US
dc.type.coarhttp://purl.org/coar/resource_type/c_6501es_ES
item.grantfulltextnone-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.cerifentitytypePublications-
item.fulltextNo Fulltext-
item.languageiso639-1en-
item.openairetypeartículo-
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