Data/hora: 09/06/2024 08:37:05

Provedor de dados: | Acta Toxicológica Argentina
País: | Argentina
Título: | Occurrence of Microcystis aeruginosa and microcystins in Río de la Plata river (Argentina)
Autores: | Andrinolo,Darío; Pereira,Paulo; Giannuzzi,Leda; Aura,Claudia; Massera,Silvia; Caneo,Mariela; Caixach,Josep; Barco,Mónica; Echenique,Ricardo.
Data: | 2007-07-01
Ano: | 2007
Palavras-chave: | Microcistys aeruginosa; Bloom; Rio de la Plata; Hepatotoxins; Microcystin; HPLC-Diode array.
Resumo: | This paper is the first report on microcystins producer blooms of Microcystis aeruginosa in the Argentinean coast of the Río de la Plata river, the most important drinking water supply of Argentina. The distribution of toxic cyanobacterium Microcystis cf. aeruginosa blooms in the Argentinean coast of the Rio de la Plata river was studied from December 2003 and January 2006. Microcystis aeruginosa persisted in the river with values ranged between 0 - 7.8 10(4) cells ml-1. Samples of two Microcystis aeruginosa water blooms were collected at La Plata river and were analyzed by the mouse bioassay and by high-performance liquid chromatography with Diode-array and MS detector. The samples showed high hepatotoxicity in mouse bioassay and, in accordance, important amount of microcystins. The bloom samples contained microcystins LR and a variant of microcystin with a molecular ion [M+H]+= 1037.8 m/z as major components. The total toxin content found in these samples was 0.94&amp;#956;g/mg and 0.69&amp;#956;g/mg of lyophilised cells. We conclude that the presence of toxic clones of Microcystis aeruginosa in the Argentinean coast of the Río de la Plata is an actual sanitary and environmental problem and that further studies are necessary to make the risk assessment.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-37432007000100002
Editor: | Asociación Toxicológica Argentina
Formato: | text/html
Fonte: | Acta toxicológica argentina  v.15 n.1 2007
Fonte: | info:eu-repo/semantics/openAccess