Nitrogen and phosphorus limitation in cultured Alexandrium minutum Halim does not promote toxin production
1995
Flynn, Krystyna | Franco, José Mariano | Fernández, Pablo | Reguera Ramírez, Beatriz | Zapata, Manuel | Flynn, Kevin | Lassus, P. (Patrick) | Arzul, G. (Geneviève) | Erard-Le-Denn, E. (Evelyne) | Gentien, P. (Patrick) | Marcaillou-Le-Baut, C. (Claire) | Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
Studies of a high- and low-toxin strains of Alexandrium minutum isolated from Ría de Vigo fail to indicate profound C-N pbysiology differences in amino acid synthesis, biomass, growth rates or pigmentation, which might explain the 10 to 20 fold differences in PSP toxin content. Maximum toxin synthesis occurs during N-refeeding of N-deprived cells and thereafter toxin content covaries with free intracellular arginine. For both strains, toxin synthesis and toxin content on a cell or biomass basis decline during N or P deprivation. Implications for changes in the toxin content of field populations are discussed.
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