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- W407320070 abstract "Cultures of Alexandrium sp (Dinophyceae: Gonyaulacaceae) were prepared with the purpose of evaluating their growth and potential toxigenic under different experimental conditions: continuous light, 12:12 h light/darkness cycles and continuous light with arginine addition. Active growth of cells was observed at 34.5‰ of salinity, 24 ± 1 °C of temperature under different culture experimental conditions. The species showed different patterns of growth, and cellular size varied according to the growth phase. Cell length was 32 to 35 μm, and 31 to 35.1 μm wide; they grew more actively under continuous light conditions than in under 12:12 h light darkness cycles. Cellular density was higher after the luminous period. Toxicity level of Alexandrium sp varied according to experimental conditions; saxitoxin concentration was lower in the culture under continuous light conditions than under 12:12 h light/dark photoperiod. In the assay with 12:12 h light/darkness cycles and arginine addition (1 mM), saxitoxin concentration decreased two months after the initial assay and the supernadant samples of both test were toxic with and without agitation, although the toxicity level was low. The biotoxicity assays indicated that Alexandrium sp. can show different toxicity levels and that the production and concentration of toxins is independent of the cell density and physiologic condition of the cells." @default.
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- W407320070 date "2000-01-01" @default.
- W407320070 modified "2023-09-23" @default.
- W407320070 title "Potencial toxigénico de Alexandrium sp (Dinophyceae: Gonyaulacaceae) en diferentes condiciones experimentales" @default.
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