Abstract
Marine algae are potential sources of biologically active compounds with antiviral, antimicrobial and anticancer activities. Two species of marine algae, Padina boryana Thivy and Enteromorpha sp were collected from the Red Sea. Both species were extracted with ethanol, acetone, and hexane. The extracts of each sample were examined for, total phenolic, total flavonoid contents and antimicrobial activities. The results showed that solvents with different polarities have various effects on phenolic and flavonoid contents. Among the tested solvents, ethanolic extract of Padina boryana Thivy and Enteromorpha sp showed the highest phenolic content. Results also indicated that the extracts of Padina boryana Thivy showed higher antimicrobial activity compared to Enteromorpha sp. The present study demonstrates that both algae species exhibited excellent antimicrobial properties which can provide opportunities for the application of algal extract as natural food preservative for possible application in food and dietary supplemental products for health promotion.
Highlights
The marine environment is a good source of bioactive secondary metaboliets, many of which exhibit structural features not found in terrestrial natural products (Cantillo et al, 2010)
The aim of this study is to evaluate the antimicrobial activity of ethanol, acetone, and hexane extracts of Padina boryana Thivy and Enteromorpha sp
The total phenolic and total flavonoid contents of three different solvent extracts of Padina boryana Thivy and Enteromorpha were evaluated and the results are presented in table (1)
Summary
The marine environment is a good source of bioactive secondary metaboliets, many of which exhibit structural features not found in terrestrial natural products (Cantillo et al, 2010). Marine seaweeds contains many valuable components that could potentially be exploited as functional ingredients and therapeutic agents. Researchers have described a wide range of biological activities for algal compounds including antibiotic, anti-inflammatory, anti- fungal anticancer, and antineoplastic (Ayyad et al, 2003; Lincolon et al, 1991). The extracts and active constituents of various marine algae have been shown to antimicrobial potential (Lima-Filho et al, 2002; Paul et al, 2006). The antimicrobial compounds derived from the marine algae consist of a diverse group of chemical compounds (Nor Afifah et al, 2010). The ability of algae to produce antimicrobial substances could be used as a defense agent (against pathogens) and as pharmaceutical bioactive natural compounds
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