FN Archimer Export Format PT J TI Acclimation of the marine diatom Pseudo‐nitzschia australis to different salinity conditions: effects on growth, photosynthetic activity and domoic acid content BT AF Ayache, Nour Hervé, Fabienne Lundholm, Nina Amzil, Zouher Caruana, Amandine AS 1:1;2:1;3:2;4:1;5:1; FF 1:PDG-ODE-DYNECO-PHYC;2:PDG-ODE-DYNECO-PHYC;3:;4:PDG-ODE-DYNECO-PHYC;5:PDG-ODE-DYNECO-PHYC; C1 IFREMER Phycotoxin Laboratory rue de l’Ile d’Yeu, BP 2110544311Nantes , France Natural History Museum of Denmark University of Copenhagen Øster Farimagsgade 51307Copenhagen , Denmark C2 IFREMER, FRANCE NHM DENMARK, DENMARK SI NANTES SE PDG-ODE-DYNECO-PHYC IN WOS Ifremer UPR copubli-europe IF 2.923 TC 16 UR https://archimer.ifremer.fr/doc/00585/69684/67552.pdf LA English DT Article DE ;acclimation;climate change;domoic acid;Pseudo-nitzschia australis;physiology;salinity AB oxic Pseudo‐nitzschia australis strains isolated from French coastal waters were studied to investigate their capacity to adapt to different salinities. Their acclimation to different salinity conditions (10, 20, 30, 35 and 40) was studied on growth, photosynthetic capacity, cell biovolume and domoic acid (DA) content. The strains showed ability to acclimate to a salinity range from 20 to 40, with optimal growth rates between salinities 30 and 40. The highest cell biovolume was observed at the lowest salinity 20 and was associated with the lowest growth rate. Salinity did not affect the photosynthetic activity; Fv/Fm values and the pigment contents remained high with no significant difference among salinities. An enhanced production of zeaxanthin was, however, observed in the late stationary and decline phases in all cultures except for those acclimated to salinity 20. In terms of cellular toxin content, DA concentrations were 2 to 3‐fold higher at the lowest salinity (20) than at the other salinities and were combined with a low amount of dissolved DA. The fact that P. australis accumulate more DA per cell in less saline waters, illustrates that climate‐related changes in salinity may affect Pseudo‐nitzschia physiology through direct effects on growth, physiology and toxin content. PY 2020 PD FEB SO Journal Of Phycology SN 0022-3646 PU Wiley VL 56 IS 1 UT 000496600800001 BP 97 EP 109 DI 10.1111/jpy.12929 ID 69684 ER EF