Measurement of anthocyanin and antioxidant content of extracts of three important algal species on the northern shores of the Oman Sea

Abstract

Introduction: Macroalgae, are important in aquatic habitats. This plants have been receiving
increasing attention as a promising natural source of antioxidants. In this regard, at the present
study the content of flavonoids, anthocyanin and ferric reducing antioxidant power in three
species of native algae to the northern coast of the Oman Sea (Sistan and Baluchestan province)
compared.
Materials & Methods: Sampling was carried out in autumn and winter of 2018 on the northern
shores of the Oman Sea (Chabahar Gulf). Samples include one species of green algae (Ulva
lactuca) and two species of brown algae (Sargassum illicifolium and Nizamuddinia zanardinii).
The total content of anthocyanin and flavonoid are measured by spectrophotometry. However,
antioxidant properties were also measured by ferric reducing antioxidant power.
Results: Based on the results, the studied species showed a significant difference in the studied
indices (P<0.05). Total anthocyanin contents in S. illicifolium, N. zanardinii and U. lactuca
extracts was 8.31±1.14, 5.19±1.36 and 3.59±1.84 mg per 100 g dry weight, respectively
(P<0.05). Total flavonoid content 27.40±2.71, 21.12±1.14 and 0.39±0.12 mg per 100 g QE per
100 g dry weight and ferric reducing antioxidant power was 1.21±0.36, 0.67±0.10 and
0.60±0.12, respectively (P<0.05).
Conclusion: In concluded, the results of this study indicate that the total amount of anthocyanin
and flavonoid contents as well as ferric reducing antioxidant power in S. illicifolium extract were
significantly higher than U. lactuca and N. zanardinii.