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dc.contributor.author
Gao, Kunshan
dc.contributor.author
Li, Ping
dc.contributor.author
Watanabe, Teruo
dc.contributor.author
Helbling, Eduardo Walter
dc.date.available
2020-04-14T15:27:20Z
dc.date.issued
2008-06
dc.identifier.citation
Gao, Kunshan; Li, Ping; Watanabe, Teruo; Helbling, Eduardo Walter; Combined effects of ultraviolet radiation and temperature on morphology, photosynthesis, and DNA of Arthrospira (Spirulina) Platensis (Cyanophyta); Wiley Blackwell Publishing, Inc; Journal Of Phycology; 44; 3; 6-2008; 777-786
dc.identifier.issn
0022-3646
dc.identifier.uri
http://hdl.handle.net/11336/102461
dc.description.abstract
Natural levels of solar UVR were shown to break and alter the spiral structure of Arthrospira (Spirulina) platensis (Nordst.) Gomont during winter. However, this phenomenon was not observed during summer at temperatures of 30C. Since little has been documented on the interactive effects of solar UV radiation (UVR; 280?400 nm) and temperature on cyanobacteria, the morphology, photosynthesis, and DNA damage of A. platensis were examined using two radiation treatments (PAR [400?700 nm] and PAB [PAR + UV-A + UV-B: 280?700]), three temperatures (15, 22, and 30C), and three biomassconcentrations (100, 160, and 240 mg dwt [dry weight] Æ L)1). UVR caused a breakage of the spiral structure at 15C and 22C, but not at 30C. High PAR levels also induced a significant breakage at 15C and 22C, but only at low biomass densities, and to lesser extent when compared with the PAB treatment. A. platensis was able to alter its spiral structure by increasing helix tightness at the highest temperature tested. The photochemical efficiencywas depressed to undetectable levels at 15C but was relatively high at 30C even under the treatment with UVR in 8 h. At 30C, UVR led to 93%?97% less DNA damage when compared with 15C after 8 h of exposure. UV-absorbing compounds were determined as negligible at all light and temperature combinations. The possible mechanisms for the temperature-dependent effects of UVR on this organism are discussed in this paper.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Wiley Blackwell Publishing, Inc
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
UVR
dc.subject
TEMPERATURE
dc.subject
DNA damage
dc.subject
morphology
dc.subject
photosynthesis
dc.subject.classification
Otros Tópicos Biológicos
dc.subject.classification
Ciencias Biológicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Combined effects of ultraviolet radiation and temperature on morphology, photosynthesis, and DNA of Arthrospira (Spirulina) Platensis (Cyanophyta)
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2020-03-16T15:09:11Z
dc.journal.volume
44
dc.journal.number
3
dc.journal.pagination
777-786
dc.journal.pais
Reino Unido
dc.journal.ciudad
Londres
dc.description.fil
Fil: Gao, Kunshan. Shantou University; China. Xiamen University; China
dc.description.fil
Fil: Li, Ping. Shantou University; China
dc.description.fil
Fil: Watanabe, Teruo. No especifíca;
dc.description.fil
Fil: Helbling, Eduardo Walter. Shantou University; China. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina
dc.journal.title
Journal Of Phycology
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1529-8817.2008.00512.x
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1111/j.1529-8817.2008.00512.x
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