UVR and PAR absorbing compounds of marine brown macroalgae along a latitudinal gradient of the Brazilian coast.

Autor: Schmitz C; Laboratório de Ficologia, Departamento de Botânica, Universidade Federal de Santa Catarina, Florianópolis, Brazil. Electronic address: carolineschmitz-bio@hotmail.com., Ramlov F; Laboratório de Morfogênese e Bioquímica Vegetal, Centro de Ciências Agrárias, Universidade Federal de Santa Catarina, Florianópolis, Brazil., de Lucena LAF; Laboratório de Ficologia, Departamento de Botânica, Universidade Federal de Santa Catarina, Florianópolis, Brazil., Uarrota V; Laboratório de Morfogênese e Bioquímica Vegetal, Centro de Ciências Agrárias, Universidade Federal de Santa Catarina, Florianópolis, Brazil., Batista MB; Laboratório de Ficologia, Departamento de Botânica, Universidade Federal de Santa Catarina, Florianópolis, Brazil., Sissini MN; Laboratório de Ficologia, Departamento de Botânica, Universidade Federal de Santa Catarina, Florianópolis, Brazil., Oliveira I; Universidade Federal da Bahia, Instituto de Biologia, Departamento de Botânica, Rua Barão de Geremoabo s/n - Campus de Ondina Laboratório de Algas Marinhas (LAMAR), Ondina.Salvador, Brazil., Briani B; Laboratório de Ficologia, Departamento de Botânica, Universidade Federal de Santa Catarina, Florianópolis, Brazil., Martins CDL; Laboratório de Ficologia, Departamento de Botânica, Universidade Federal de Santa Catarina, Florianópolis, Brazil., Nunes JMC; Universidade Federal da Bahia, Instituto de Biologia, Departamento de Botânica, Rua Barão de Geremoabo s/n - Campus de Ondina Laboratório de Algas Marinhas (LAMAR), Ondina.Salvador, Brazil., Rörig L; Laboratório de Ficologia, Departamento de Botânica, Universidade Federal de Santa Catarina, Florianópolis, Brazil., Horta PA Jr; Laboratório de Ficologia, Departamento de Botânica, Universidade Federal de Santa Catarina, Florianópolis, Brazil., Figueroa FL; Departamento de Ecología, Facultad de Ciencias, Universidad de Málaga, Campus Universitário de Teatinos s/n, Málaga, Spain., Korbee N; Departamento de Ecología, Facultad de Ciencias, Universidad de Málaga, Campus Universitário de Teatinos s/n, Málaga, Spain., Maraschin M; Laboratório de Morfogênese e Bioquímica Vegetal, Centro de Ciências Agrárias, Universidade Federal de Santa Catarina, Florianópolis, Brazil., Bonomi-Barufi J; Laboratório de Ficologia, Departamento de Botânica, Universidade Federal de Santa Catarina, Florianópolis, Brazil.
Jazyk: angličtina
Zdroj: Journal of photochemistry and photobiology. B, Biology [J Photochem Photobiol B] 2018 Jan; Vol. 178, pp. 165-174. Date of Electronic Publication: 2017 Oct 31.
DOI: 10.1016/j.jphotobiol.2017.10.029
Abstrakt: Absorption spectra are indicative of biological sample chemical composition and can be used as a basis for the construction of descriptive and predictive models for biotechnological screening or assays. In marine algae, chemical composition can vary due to species-specific differences in biochemistry, as well as intra-specific responses to unique environmental variables. Different indices (UV C i, UV B+A i and PARi) were proposed and calculated to evaluate how photoprotective compounds vary in 18 species of Phaeophyceae. In addition, they were correlated to abiotic factors. Through this technique, seven main peaks were detected in the absorbing spectra of marine brown algal extracts. The highest photoprotective indices values were found in species collected in tropical areas, where higher solar radiation is observed compared to the southern Brazilian coast. Considering additional abiotic factors, water temperature and nitrate concentration were negatively correlated with UV indices. PARi's indices were positively affected by nitrate. All species collected on the Brazilian coast have absorption peaks in the region of phenolic compounds and carotenoids, suggesting that tropical marine brown macroalgae may have developed an effective antioxidant defense system, suggesting adaptation to environments characterized by high solar radiation. UVR/PAR indices congregated essential information to possible future biotechnological screening, facilitating selection of high priority species or sites, fostering actions to enhance alternative sustainable management strategies of coastal environments.
(Copyright © 2017 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: