Screening for antioxidant capacity of tropical reef seaweeds: prospection for new natural antioxidants
DOI:
https://doi.org/10.5914/tropocean.v45i2.237379Palavras-chave:
antioxidant, free radicals, functional products, reactive oxygen species, tropical algae.Resumo
The screening of antioxidant capacity may be a useful, rapid and feasible tool to identify potential seaweed species for future prospecting approaches. For intertidal reefs of Pernambuco, Northeastern of Brazil, we report the first antioxidant activity screening of 11 abundant seaweeds, specifically dichloromethane:methanol extracts. Five different in vitro antioxidant assays (DPPH, ABTS, Chelator, FRAP and Folin-Ciocalteu assays) were chosen for evaluating the antioxidant ability. All studied species showed a dose-dependence antioxidant pattern and elevated capacity even at low extract concentration. Reef environments are stressful ecosystems, which impose extreme abiotic conditions, resulting in adapted seaweeds that inhabit there with expressive competence to manage oxidative stress. The studied brown algae were the most prominent along with the green algae, enabling the possibility to reinforce the recommendation of further studies to prospect these species as sources of natural antioxidants for functional applications.
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