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Bioactive Phenolic Metabolites from Adriatic Brown Algae Dictyota dichotoma and Padina pavonica (Dictyotaceae)

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Department of Food Technology and Biotechnology, Faculty of Chemistry and Technology, University of Split, R. Boškovića 35, HR-21000 Split, Croatia
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Department of Marine Studies, University of Split, R. Boškovića 37, HR-21000 Split, Croatia
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Department of Chemistry, Faculty of Science, University of Split, R. Boškovića 33, HR-21000 Split, Croatia
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Authors to whom correspondence should be addressed.
Academic Editors: Oscar Martinez-Alvarez and Maria Elvira López-Caballero
Foods 2021, 10(6), 1187; https://doi.org/10.3390/foods10061187
Received: 27 April 2021 / Revised: 19 May 2021 / Accepted: 23 May 2021 / Published: 25 May 2021
In this study, the influences of temperature (20, 40 and 60 °C) and extraction solvents (water, ethanol) on the ultrasound-assisted extraction of phenolics from the Adriatic macroalgae Dictyota dichotoma and Padina pavonica were studied. The extracts were analysed for major phenolic sub-groups (total phenolics, flavonoids and tannins) using spectrometric methods, while the individual phenolics were detected by HPLC. The antioxidant activities were evaluated using three methods: Ferric Reducing/Antioxidant Power (FRAP), scavenging of the stabile 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical and Oxygen Radical Antioxidant Capacity (ORAC). The aim of the study was also to find the connection between the chemical composition of the extracts and their biological activity. Therefore, principal component analysis (PCA), which permits simple representation of different sample data and better visualisation of their correlations, was used. Higher extraction yields of the total phenolics, flavonoids and tannins were obtained using an alcoholic solvent, while a general conclusion about the applied temperature was not established. These extracts also showed good antioxidant activity, especially D. dichotoma extracts, with high reducing capacity (690–792 mM TE) and ORAC values (38.7–40.8 mM TE in 400-fold diluted extracts). The PCA pointed out the significant influence of flavonoids and tannins on the investigated properties. The results of this investigation could be interesting for future studies dealing with the application of these two algae in foods, cosmetics and pharmaceuticals. View Full-Text
Keywords: antioxidants; biological activity; brown seaweeds; extraction mode; phenolic compounds antioxidants; biological activity; brown seaweeds; extraction mode; phenolic compounds
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MDPI and ACS Style

Generalić Mekinić, I.; Šimat, V.; Botić, V.; Crnjac, A.; Smoljo, M.; Soldo, B.; Ljubenkov, I.; Čagalj, M.; Skroza, D. Bioactive Phenolic Metabolites from Adriatic Brown Algae Dictyota dichotoma and Padina pavonica (Dictyotaceae). Foods 2021, 10, 1187. https://doi.org/10.3390/foods10061187

AMA Style

Generalić Mekinić I, Šimat V, Botić V, Crnjac A, Smoljo M, Soldo B, Ljubenkov I, Čagalj M, Skroza D. Bioactive Phenolic Metabolites from Adriatic Brown Algae Dictyota dichotoma and Padina pavonica (Dictyotaceae). Foods. 2021; 10(6):1187. https://doi.org/10.3390/foods10061187

Chicago/Turabian Style

Generalić Mekinić, Ivana, Vida Šimat, Viktorija Botić, Anita Crnjac, Marina Smoljo, Barbara Soldo, Ivica Ljubenkov, Martina Čagalj, and Danijela Skroza. 2021. "Bioactive Phenolic Metabolites from Adriatic Brown Algae Dictyota dichotoma and Padina pavonica (Dictyotaceae)" Foods 10, no. 6: 1187. https://doi.org/10.3390/foods10061187

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