Premium
Effects of Ultraviolet Radiation ( UV ‐A+ UV ‐B) on the Antioxidant Metabolism of the Red Macroalga Species Acanthophora spicifera (Rhodophyta, Ceramiales) From Different Salinity and Nutrient Conditions
Author(s) -
Pereira Débora Tomazi,
Pereira Bárbara,
Fonseca Alessandra,
Ramlov Fernanda,
Maraschin Marcelo,
ÁlvarezGómez Félix,
Figueroa Felix L.,
Schmidt Éder Carlos,
Bouzon Zenilda Laurita,
Simioni Carmen
Publication year - 2019
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/php.13094
Subject(s) - ceramiales , orientin , superoxide dismutase , salinity , catalase , antioxidant , acclimatization , botany , peroxidase , chemistry , biology , carotenoid , food science , vitexin , algae , biochemistry , enzyme , ecology , flavonoid
Acanthophora spicifera (M.Vahl) Børgesen is a macroalga of great economic importance. This study evaluated the antioxidant responses of two algal populations of A. spicifera adapted to different abiotic conditions when exposed to ultraviolet‐A+ultraviolet‐B radiation ( UV ‐A+ UV ‐B). Experiments were performed using the water at two collection points for 7 days of acclimatization and 7 days of exposure to UVR (3 h per day), followed by metabolic analyses. At point 1, water of 30 ± 1 practical salinity unit (psu) had concentrations of 1.06 ± 0.27 m mNH 4 + , 8.47 ± 0.01 m mNO 3 − , 0.17 ± 0.01 m mPO 4 − 3and pH 7.88. At point 2, water of 35 ± 1 psu had concentrations of 1.13 ± 0.05 m mNH 4 + , 3.73 ± 0.01 m mNO 3 − , 0.52 ± 0.01 m mPO 4 − 3and pH 8.55. Chlorophyll a, phycobiliproteins, carotenoids, mycosporins, polyphenolics and antioxidant enzymes (catalase, superoxide dismutase and guaiacol peroxidase) were evaluated. The present study demonstrates that ultraviolet radiation triggers antioxidant activity in the A. spicifera . However, such activation resulted in greater responses in samples of the point 1, with lower salinity and highest concentration of nutrients.