Influence of Environmental Factors on the Paralytic Shellfish Toxin Content and Profile of Alexandrium catenella (Dinophyceae) Isolated from the Mediterranean Sea
|Author(s)||Laabir Mohamed1, Collos Yves1, Masseret Estelle1, Grzebyk Daniel1, Abadie Eric2, Savar Veronique3, Sibat Manoella3, Amzil Zouher3|
|Affiliation(s)||1 : Univ Montpellier I, Univ Montpellier 2, CNRS, IFREMER,IRD,UMR Ecol Syst Marins Cotiers 5119, F-34095 Montpellier 5, France.
2 : IFREMER, Lab Environm Ressources Languedoc Roussillon, F-34203 Sete, France.
3 : IFREMER, Phycotoxins Lab, F-44311 Nantes 3, France.
|Source||Marine Drugs (1660-3397) (Mdpi Ag), 2013-05 , Vol. 11 , N. 5 , P. 1583-1601|
|WOS© Times Cited||20|
|Note||This article belongs to the Special Issue Marine Neurotoxins|
|Keyword(s)||Alexandrium catenella, PSP toxins, temperature, salinity, light|
|Abstract||Laboratory experiments were designed to study the toxin content and profile of the Alexandrium catenella strain ACT03 (isolated from Thau Lagoon, French Mediterranean) in response to abiotic environmental factors under nutrient-replete conditions. This dinoflagellate can produce various paralytic shellfish toxins with concentrations ranging from 2.9 to 50.3 fmol/cell. The toxin profile was characterized by carbamate toxins (GTX3, GTX4 and GTX5) and N-sulfocarbamoyl toxins (C1, C2, C3 and C4). C2 dominated at 12-18 degrees C, but only for salinities ranging from 10 to 25 psu, whereas GTX5 became dominant at temperatures ranging from 21 to 30 degrees C at almost all salinities. There was no significant variation in the cellular toxin amount from 18 degrees C to 27 degrees C for salinities ranging between 30 and 40 psu. At salinities of 10 to 25 psu, the toxin concentrations always remained below 20 fmol/cell. Toxin content was stable for irradiance ranging from 10 to 70 mu mol photons/ m(2)/s then slightly increased. Overall, the toxin profile was more stable than the toxin content (fmol/cell), except for temperature and/or salinity values different from those recorded during Alexandrium blooms in Thau Lagoon.|