Resumen del producto

Seaweeds are a promising source of bioactive compounds that can be used in the treatment of human diseases or to control and prevent the colonization of fouling organisms. These two problems are now solved with the use of conventional antibiotics, which microorganism are becoming increasingly resistant, and with insulating paints, which main compounds includes heavy metals and some other toxic compounds. It becomes necessary to develop research to first, identify promising algae species and second, to characterize and identify substances of particular interest to pharmaceutical and marine industries in order to optimize the resources of many species from which their possible applications are still unknown. This study evaluated 1) the antibacterial potential of six species of macroalgae from the Gulf of California by testing organic extracts against strains Staphylococcus aureus and Escherichia coli and 2) the antifouling ability against different marine organisms (bacteria, fungi and microalgae). Laurencia johnstonii, Ulva lactuca and Dictyota flabellata showed a moderately active bacterial antibiosis, being the ethereal extracts more active against the bacterial strain S. aureus (19, 8.5 and 7.5 mm). The best results were obtained with antifouling Ulva lactuca and Laurencia johnstonii, which presented the greatest range of inhibition (0.1-1 mg / ml) against all strains tested.

Palabras clave: Specialist; Antibacterial; seaweeds; bioactivity; antifouling

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