Toxin composition of a Prorocentrum lima strain isolated from the Portuguese coast.
Microalgae of the genus Dinophysis and Prorocentrum are known producers of okadaites, responsible for the human syndrome known as diarrhetic shellfish poisoning (DSP). In temperate regions, only species from the genus Dinophysis are commonly held responsible for shellfish contamination. This is probably related to the different ecological strategies of the two genera, namely the planktonic nature of Dinophysis versus the benthic/epiphytic nature of toxic Prorocentrum species. In recent years, the threat of global warming has drawn attention to the study of benthic toxic microalgae in southern European waters. Here we present results on the toxin production and toxin profile of a Prorocentrum lima strain isolated from the Portuguese coast. This strain, IO66-01, presented a mean growth rate of 0.49 divisions d(-1), not common in temperate strains, and only comparable with tropical strains. The parent toxins found were okadaic acid (OA) and dinophysistoxin-1 (DTX1). The major diol esters were D8- and D9- congeners of both OA and DTX1.
Instituto Nacional dos Recursos Biológicos - IPIMAR (INRB-IPIMAR), Av. Brasília, s/n, 1449-006 Lisboa, Portugal. pvale@ipimar.pt
Paulo
P
Vale
Vera
V
Veloso
Ana
A
Amorim
D000818:Animals; D002851:Chromatography, High Pressure Liquid; D004141:Dinoflagellida; D007202:Indicators and Reagents; D008387:Marine Toxins / Q000633:toxicity*; D013058:Mass Spectrometry; D019319:Okadaic Acid / Q000737:chemistry / Q000633:toxicity / Q000031:analogs & derivatives; D011174:Portugal; D011714:Pyrans / Q000737:chemistry / Q000633:toxicity; D021241:Spectrometry, Mass, Electrospray Ionization
D007202:Indicators and Reagents; D008387:Marine Toxins; D011714:Pyrans; D019319:Okadaic Acid; C051904:dinophysistoxin 1