UV-radiation effects on photosynthesis, photosynthetic pigments and UV-absorbing substances in three species of tropical lotic macroalgae

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorBautista-Saraiva, Anna Isabel N.-
Autor(es): dc.creatorBonomi-Barufi, Jose-
Autor(es): dc.creatorFigueroa, Felix L.-
Autor(es): dc.creatorNecchi, Orlando-
Data de aceite: dc.date.accessioned2021-03-10T23:59:04Z-
Data de disponibilização: dc.date.available2021-03-10T23:59:04Z-
Data de envio: dc.date.issued2018-11-26-
Data de envio: dc.date.issued2018-11-26-
Data de envio: dc.date.issued2018-09-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1007/s40626-018-0113-6-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/164599-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/164599-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionFreshwater algae inhabiting shallow waters are most effectively affected by UV radiation. The aim of this study was to analyze the photosynthetic performance (parameters derived of chlorophyll fluorescence), chlorophyll a concentrations and the content of UV-absorbing compounds (mycosporine-like aminoacids-MAAs) in three tropical lotic macroalgae, Cladophora glomerata (Chlorophyta), Spirogyra sp. (Streptophyta) and Sirodotia delicatula (Rhodophyta) in response to UV radiation exposure under laboratory conditions. Experiments were performed under three treatments: (1) PAR (400-700 nm), P; (2) PAR + UVA (320-700 nm), PA; (3) PAR + UVA + UVB (280-700 nm), PAB. Cladophora glomerata and Spirogyra sp., typical sun-adapted lotic macroalgae, had distinct responses to UV radiation exposure. A more pronounced decrease of F (v)/F (m) and increase of NPQ under UVA than UVAB was observed, whereas chlorophyll a content was lower under UVAB in C. glomerata. Spirogyra sp. had a decrease of photosynthetic yields (Delta F/F (m)' and F (v)/F (m)) under PAR, indicating that UVAB radiation may have a positive effect on the photosynthetic apparatus. Surprisingly, S. delicatula, a shade-adapted alga, exhibited less sensitivity to UV exposure. These results suggest that the presence of MAAs (shinorine and palythine) in S. delicatula is a significant shield of protection against UV radiation.-
Formato: dc.format181-192-
Idioma: dc.languageen-
Publicador: dc.publisherBrazilian Soc Plant Physiology-
Relação: dc.relationTheoretical And Experimental Plant Physiology-
Relação: dc.relation0,493-
Direitos: dc.rightsopenAccess-
Palavras-chave: dc.subjectChlorophyll fluorescence-
Palavras-chave: dc.subjectGreen algae-
Palavras-chave: dc.subjectPhotosynthesis-
Palavras-chave: dc.subjectRed algae-
Palavras-chave: dc.subjectRadiation-
Palavras-chave: dc.subjectUV-absorbing substances-
Título: dc.titleUV-radiation effects on photosynthesis, photosynthetic pigments and UV-absorbing substances in three species of tropical lotic macroalgae-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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