AbstractAzaspiracids (AZA), a group of lipophilic phycotoxins, are produced by some species of the marine dinophycean genus Azadinium. AZA have recently been detected in shellfish from the Southeast Pacific, however, AZA-producing species have not been recorded yet from the area. This study is the first record of the genus Azadinium and of the species Azadinium poporum from the Pacific side of South America. Three strains of A. poporum from Chañaral (Northern Chile) comply to the type description of A. poporum by the presence of multiple pyrenoids, in thecal plate details, and in the position of the ventral pore located on the left side of the pore plate. Molecular phylogeny, based on internal transcribed spacer and large subunit ribosomal DNA sequences, revealed that Chilean strains fall in the same ribotype clade as European and strains from New Zealand. Analyses of AZA profiles using LC–MS/MS showed an identical profile for all three strains with the presence of AZA-11 and two phosphorylated AZA. This is the first confirmation of the presence of AZA producing Azadinium in the Chilean coastal area and underlines the risk of AZA shellfish and concomitant human contamination episodes in the Southeast Pacific region.
Journal of Plankton Research – Oxford University Press
Published: Mar 1, 2017
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