Resumen del producto

It is recognised that seaweeds are important sources of natural products, and some of this compounds have an important role in the defence against epibiosis¹. Therefore several researches studying the potential of marine algae extracts help solving a serious problem such as biofouling and the severe consequences of the use of highly polluting agents. The goal of this work is to evaluated methanol and dichloromethane extracts of seaweeds Codium fragile, Ulva lactuca, Sargassum horridum, Gracilaria vermiculophylla y Laurencia gardneri from La Paz Bay, Mexico. The seaweeds extracts were tested in laboratory assays to assess whether or not these inhibit the growth of marine bacteria involved in the formation biofilms², inhibition of phenoloxidase activity³ (at the concentrations of 0.1, 1, 10, 100 and 1000 µg mL^-1) and a toxicity assay on brine shrimp nauplii. The results (Table 1) in the antibacterial activity showed that dichloromethane extract of L. gardneri was active in all the bacteria strains tested (MIC ?1 mg mL^-1). In the inhibition of enzyme activity, newly dichloromethane extract of L. gardneri and ethanol extract of S. horridum were the most active. The latter achieved 100% inhibition at a concentration of 100 µg mL^-1. The extracts were not toxic at the concentrations tested. These results indicated the presence of active substances in L. gardneri and S. horridum that could be used as no toxic antifouling agents.

Palabras clave: seaweeds; antifouling; extracts

Para obtener una copia del documento contacta la personal de la biblioteca a través del correo bibliocicimar{a}ipn.mx