Influence de l'azote et du phosphore sur la croissance et la toxicité de Prorocentrum lima (Ehrenberg) Dodge

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Éditeur(s) Adac-cryptogamie
Identifiant documentaire 9-24469
Identifiant OAI oai:archimer.ifremer.fr:24469
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Auteur(s): Morlaix, Martine,Lassus, Patrick
Mots clés Croissance Toxicité Concentration chimique Division cellulaire Production Espagne Phosphore Azote Europe Nutriment Milieu marin Zone côtière Ecotoxicologie Pyrrophycophyta Algae Thallophyta Okadaïque acide Prorocentrum lima Growth Toxicity Chemical concentration Cell division Production Spain Phosphorus Nitrogen Europe Nutrient Marine environment Coastal zone Ecotoxicology Pyrrophycophyta Algae Thallophyta
Date de publication 01/08/1992
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Date de dépôt légal
Langue fre
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Source Cryptogamie Algologie (0181-1568) (Adac-cryptogamie), 1992-08 , Vol. 13 , N. 3 , P. 187-195
Droits de réutilisation info:eu-repo/semantics/openAccess

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Very few attempts have been made in order to investigate the role of nutrients on cellular growth and toxin production in dinoflagellates associated with DSP (Diarrhetic Shellfish Poison). Some preliminary results are presented here, aiming at a better knowledge of inorganic nitrogen and organic phosphorus effects upon division rate and toxin content of Prorocentrum lima (PL2V spanish strain). Nitrogen have a positive effect on growth rate, up to a threshold value of 880muM.l-1. Above this threshold the rate decreases. There is no effect on toxin content since okadaic acid and DTX1 cell contents remain low (4.8 +/- 0.5 pg.cell.-1) and steady. Phosphorus effect upon division rate follows a non-linear relationship, whereas cellular toxic content is inversely proportional to growth rate.

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