Journal
BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY
Volume 8, Issue -, Pages 263-269Publisher
ELSEVIER
DOI: 10.1016/j.bcab.2016.09.010
Keywords
Antioxidant; Composition analysis; Growth kinetic; Microalgae; Naturally isolated; Polyphenol content
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Funding
- Research Deputy of Shiraz University of Medical Sciences, Shiraz, Iran [93-01-36-7941]
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Antioxidant capacity and polyphenol content of both intra- and extracellular constituents were investigated in five naturally isolated microalgal strains using DPPH and Folin-Ciocalteu assays respectively. Three distinct solvents with different polarities including water, ethyl acetate and hexane were employed for extracting the bioactive compounds. Obtained data from DPPH assay suggest that the studied microalgal cells show significant levels of antioxidants and polyphenol compounds ranging from 14.68 +/- 1.36 (Oocystis pusilla) to 68.68 +/- 5.95 (Scenedesmus rubescens) mu mol Trolox g(-1) and 9.62 +/- 1.37 (O. pusilla) to 48.57 +/- 3.99 (S. rubescens) mg gallic acid equivalent (GAE) g(-1) respectively. Considerable connection (R-2=0.9316) between two investigated factors prove that a great part of antioxidant activity in the studied microalgae are due to its phenolic compounds. Besides, the results of growth kinetic studies and composition analysis in the most efficient strain (S. rubescens) showed a great potential for antioxidant and polyphenolic compounds production in large scales.
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