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Identification and screening of multiple tropical microalgal strains for antioxidant activity in vitro
Zhao, Z.Y.; Rasool, M.A.; Chen, C.; Ma, S.S.; Wang, L.; Huang, G.M. (2020). Identification and screening of multiple tropical microalgal strains for antioxidant activity in vitro. Food Bioscience 36: 100649. https://dx.doi.org/10.1016/j.fbio.2020.100649
In: Food Bioscience. Elsevier: Amsterdam. ISSN 2212-4292; e-ISSN 2212-4306, more
Peer reviewed article  
Available in  Authors 
Author keywords
    Microalgae; Antioxidant capacity; Desmodesmus armatus; Dictyosphaerium sp.; Scenedesmus ecornis; Free radicals
Authors  Top 
  • Zhao, Z.Y., more
  • Rasool, M.A., more
  • Chen, C.
  • Ma, S.S.
  • Wang, L.
  • Huang, G.M.
Abstract
    To exploit indigenous microalgae with potential for antioxidant activity, 10 microalgal strains (expressed as genus and species) were isolated from fresh and sea waters in Hainan Province, China, according to their high biomass, strong antioxidant capacity and antioxidant enzyme activity. The strains were identified based on their morphology, 18s rDNA and internal transcribed spacer (ITS) sequence analysis. Five strains were identified as Dictyosphaerium sp. 1A10, Desmodesmus armatus (D. armatus) B38, Masaia oloidia 2Fg, Chlorella vulgaris B43 and Chlamydomonas chlamydogama WC11. Microalgal antioxidant capacity was determined. Dictyosphaerium sp. 1A10 showed the highest superoxide dismutase activity (940 +/- 10 U/g tissue), 2,2'-diphenyl-1-picryhydrazyl radical scavenging capacity (100 +/- 10%) and oxygen radical absorbance capacity (620 +/- 10 mu mol Trolox/g); D. armatus B38 showed the highest glutathione peroxidase activity (110 +/- 10 U/g tissue), ferrous ion chelating capacity (93 +/- 7%) and hydroxyl radical-scavenging capacity (97 +/- 2%); Scenedesmus ecornis (S. ecornis) G2 showed the highest 2,2'-azinobis-(3-ethylbenzthiazoline-6-sulphonate) scavenging capacity (92 +/- 5%). PCA also suggested that D. armatus B38, Dictyosphaerium sp. 1A10 and S. ecornis G2 with highest comprehensive scores (1.83, 1.23, and 0.59, respectively) could be the most appropriate candidates for antioxidants.
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