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dc.contributor.author
Helbling, Eduardo Walter
dc.contributor.author
Barbieri, Elena Susana
dc.contributor.author
Sinha, Rajeshwar P.
dc.contributor.author
Villafañe, Virginia Estela
dc.contributor.author
Häder, Donat P.
dc.date.available
2020-05-12T18:55:24Z
dc.date.issued
2004-07
dc.identifier.citation
Helbling, Eduardo Walter; Barbieri, Elena Susana; Sinha, Rajeshwar P.; Villafañe, Virginia Estela; Häder, Donat P.; Dynamics of potentially protective compounds in Rhodophyta species from Patagonia (Argentina) exposed to solar radiation; Elsevier Science Sa; Journal of Photochemistry and Photobiology B: Biology; 75; 1-2; 7-2004; 63-71
dc.identifier.issn
1011-1344
dc.identifier.uri
http://hdl.handle.net/11336/104923
dc.description.abstract
The impact of solar radiation upon potentially protective compounds (i.e., UV-absorbing compounds and carotenoids) was assessed in four Rhodophyte species from Patagonia (i.e., Ceramium sp. Lyngbye, Corallina officinalis Linnaeus, Callithamnion gaudichaudii Agardh and Porphyra columbina Montagne) during short-term (i.e., 46 h) experiments. Algae were exposed to solar radiation under two treatments (PAR only: 400–700 nm, and PAR + UVR: 280–700 nm) and sub-samples were taken every 3 h (or longer periods at night) to determine the spectral absorption characteristics and concentration of UV-absorbing compounds, carotenoids and photosynthetic pigments. Except for C. gaudichaudii which displayed a decrease in chl-a concentration throughout the experiment, photosynthetic pigments had small variations in all species. UV-absorbing compounds concentration had species-specific responses: Ceramium sp. was the only species in which UV-absorbing compounds concentration varied as a function of solar irradiance, with maximum values around local noon. In C. officinalis and P. columbina UV-absorbing compounds concentration increased as compared to that of chl-a; in Ceramium sp. and C. gaudichaudii, however, there was no relationship between UV-absorbing compounds content and chl-a concentration. Carotenoids, on the other hand, did co-vary with chl-a in all species. Our data suggest that, with the exception of C. gaudichaudii, the differential responses of UV-absorbing compounds concentrations are more associated to the previous light history of the algae (i.e., in turn due to their position in the intertidal zone) rather than to the radiation treatment imposed to the samples. Based on our results, the variable impact of solar radiation upon productivity (and eventually biodiversity) of macroalgae from Patagonia might consequently differentially affect higher trophic levels of the aquatic food web.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science Sa
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Protective compounds
dc.subject
Rodophyta
dc.subject
Solar radiation
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Patagonia
dc.subject.classification
Biología Marina, Limnología
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Ciencias Biológicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Dynamics of potentially protective compounds in Rhodophyta species from Patagonia (Argentina) exposed to solar radiation
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2020-04-27T14:42:48Z
dc.journal.volume
75
dc.journal.number
1-2
dc.journal.pagination
63-71
dc.journal.pais
Países Bajos
dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Helbling, Eduardo Walter. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina
dc.description.fil
Fil: Barbieri, Elena Susana. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina
dc.description.fil
Fil: Sinha, Rajeshwar P.. Friedrich Alexander Universität Erlangen Nurnberg; Alemania
dc.description.fil
Fil: Villafañe, Virginia Estela. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Häder, Donat P.. Friedrich Alexander Universität Erlangen Nurnberg; Alemania
dc.journal.title
Journal of Photochemistry and Photobiology B: Biology
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.jphotobiol.2004.05.006
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S1011134404000673
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