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dc.contributor.author Rivas, C.
dc.contributor.author Navarro, N.
dc.contributor.author Huovinen, Pirjo
dc.contributor.author Gómez, L.
dc.coverage.spatial Isla Rey Jorge, Bahía Fildes
dc.date.accessioned 2017-04-06T21:18:12Z
dc.date.available 2017-04-06T21:18:12Z
dc.date.issued 2016
dc.identifier.citation Rivas et al. Revista Chilena de Historia Natural (2016) 89:7 es_ES
dc.identifier.issn 0717-6317
dc.identifier.other DOI 10.1186/s40693-016-0050-1
dc.identifier.uri http://hdl.handle.net/20.500.11894/903
dc.description BioMed Central es_ES
dc.description.abstract Background: Photosynthetic characteristics and the effect of UV radiation and elevated temperature measured were studied in Chlorella sp. isolated from a snow microalgal community at King George Island, Maritime Antarctica through the chlorophyll florescence (rapid light curves and maximum quantum yield, respectively). The environmental context was monitored through measurements of spectral depth profiles of solar radiation (down to 40 cm) in the snowpack as well as a through continuous recording of temperature and PAR using dataloggers located at different depths (0–30 cm) within the snow column. Results: The photochemistry of Chlorella sp. was affected by UV radiation in a 12-h laboratory exposure under all studied temperatures (5, 10, 15, 20 °C): the algae exposed to PAR + UV-A radiation were inhibited by 5.8 % whilst PAR + UV-A + UV-B radiation decreased Fv/Fm by 15.8 %. In both treatments the 12-h recovery after UV exposure was almost complete (80–100 %). Electron transport based P-I curve parameters maximal electron transport rate (ETRmax), photosynthetic efficiency (α) and the saturating irradiance (Ek) no varied in response to different temperatures. Conclusions: Results revealed that Chlorella sp. not only shows high photosynthetic efficiency at ambient conditions, but also exhibits tolerance to solar radiation under higher temperatures and possessing a capacity for recovery after inhibition of photosynthesis by UV radiation. es_ES
dc.description.sponsorship The study was supported by the PhD Grant DT_09-14 from Instituto Antártico Chileno (INACh) and Project ANILLO ART1101, from Conicyt. The logistic support provided by INACh and the collaboration of the staff of Base Julio Escudero Station are greatly acknowledged. This is contribution # 9 of the ANILLO ART1101 project. es_ES
dc.language.iso en es_ES
dc.publisher Sociedad de Biología de Chile es_ES
dc.relation.ispartof Revista Chilena de Historia Natural es_ES
dc.rights Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), que permite el uso sin restricciones, distribución y reproducción en cualquier medio, siempre y cuando otorgue un crédito apropiado al autor original (s) y la fuente, proporcione un enlace a la licencia de Creative Commons es_ES
dc.subject Ciencia es_ES
dc.subject Snow algae es_ES
dc.subject Photosynthesis es_ES
dc.subject UV radiation es_ES
dc.subject Temperature es_ES
dc.title Photosynthetic UV stress tolerance of the Antarctic snow alga Chlorella sp. modified by enhanced temperature? es_ES
dc.type Artículo es_ES


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