Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 2 de 2
Filtrar
Más filtros











Base de datos
Intervalo de año de publicación
2.
Proc Natl Acad Sci U S A ; 110(25): 10223-8, 2013 Jun 18.
Artículo en Inglés | MEDLINE | ID: mdl-23754363

RESUMEN

With the global proliferation of toxic harmful algal bloom species, there is a need to identify the environmental and biological factors that regulate toxin production. One such species, Karenia brevis, forms nearly annual blooms that threaten coastal regions throughout the Gulf of Mexico. This dinoflagellate produces brevetoxins, which are potent neurotoxins that cause neurotoxic shellfish poisoning and respiratory illness in humans, as well as massive fish kills. A recent publication reported that a rapid decrease in salinity increased cellular toxin quotas in K. brevis and hypothesized that brevetoxins serve a role in osmoregulation. This finding implied that salinity shifts could significantly alter the toxic effects of blooms. We repeated the original experiments separately in three different laboratories and found no evidence for increased brevetoxin production in response to low-salinity stress in any of the eight K. brevis strains we tested, including three used in the original study. Thus, we find no support for an osmoregulatory function of brevetoxins. The original publication also stated that there was no known cellular function for brevetoxins. However, there is increasing evidence that brevetoxins promote survival of the dinoflagellates by deterring grazing by zooplankton. Whether they have other as-yet-unidentified cellular functions is currently unknown.


Asunto(s)
Dinoflagelados/metabolismo , Eutrofización/fisiología , Floraciones de Algas Nocivas/fisiología , Toxinas Marinas/metabolismo , Presión Osmótica/fisiología , Oxocinas/metabolismo , Dinoflagelados/fisiología , Golfo de México , Toxinas Marinas/biosíntesis , Salinidad , Agua de Mar , Equilibrio Hidroelectrolítico/fisiología
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA