Assessment of the antioxidant and antibacterial properties of red algae (Rhodophyta) from the north coast of Tunisia

Autor: Amel Ismail, Cheima M’dallel, Monia El Bour, Imen Hmani, Leila Ktari
Rok vydání: 2021
Předmět:
Zdroj: Euro-Mediterranean Journal for Environmental Integration. 6
ISSN: 2365-7448
2365-6433
DOI: 10.1007/s41207-020-00222-7
Popis: Red seaweeds are a rich source of compounds with various bioactive properties, such as antimicrobial, antioxidant, antifouling, antiproliferative, and anticancer activities. In this study, the antioxidant and antibacterial properties of twelve red macroalgae collected from the Tunisian coast were examined. Estimated total phenolic, flavonoid, and tannin contents in methanolic extracts were found to vary among species. Gracilaria gracilis presented the highest concentration of total phenolic compounds (19.2 ± 1.88 mg GAE/g dried biomass), Laurencia obtusa showed the highest tannin content (18.95 ± 0.84 mg ECat/g DB), and Sphaerococcus cornopifolius showed the highest flavonoid content (7.17 ± 0 mg ECat/g DB). Six species showed significant DPPH radical scavenging activities and total antioxidant capacities: Asparagopsis armata, Gracilaria gracilis, Hypnea musciformis, Laurencia obtusa, Pterocladiella capillacea, and Sphaerococcus cornopifolius. Antimicrobial activity was observed for five species. This study therefore highlights the potential use of red seaweed species collected from the Tunisian coast as sources of bioactive compounds.
Databáze: OpenAIRE
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