@article{fdi:010081273, title = {{C}apacity of the potentially toxic diatoms {P}seudo-nitzschia mannii and {P}seudo-nitzschia hasleana to tolerate polycyclic aromatic hydrocarbons}, author = {{B}en {G}arali, {S}. {M}. and {S}ahraoui, {I}. and {B}en {O}thman, {H}. and {K}ouki, {A}. and de la {I}glesia, {P}. and {D}iogene, {J}. and {L}afabrie, {C}. and {A}ndree, {K}. {B}. and {F}ernandez-{T}ejedor, {M}. and {M}ejri, {K}. and {M}eddeb, {M}. and {P}ringault, {O}livier and {H}laili, {A}. {S}.}, editor = {}, language = {{ENG}}, abstract = {{T}his study investigates the effects of polycyclic aromatic hydrocarbons ({PAH}s) on two potentially toxic {P}seudonitzschia hasleana and {P}. mannii, isolated from a {PAH} contaminated marine environment. {B}oth species, maintained in non-axenic cultures, have been exposed during 144 h to increasing concentrations of a 15 {PAH}s mixture. {A}nalysis of the domoic acid, showed very low concentrations. {D}ose-response curves for growth and photosynthesis inhibition were determined. {B}oth species have maintained their growth until the end of incubation even at the highest concentration tested (120 {M}u g l-1), {N}evertheless, {P} mannii showed faster growth and seemed to be more tolerant than {P}. hasleana. {T}o reduce {PAH} toxicity, both species have enhanced their biovolume, with a higher increase for {P}. mannii relative to {P} hasleana. {B}oth species were also capable of bioconcentrating {PAH}s and were able to degrade them probably in synergy with their associated bacteria. {T}he highest biodegradation was observed for {P}. mannii, which could harbored more efficient hydrocarbon-degrading bacteria. {T}his study provides the first evidence that {PAH}s can control the growth and physiology of potentially toxic diatoms. {F}uture studies should investigate the bacterial community associated with {P}seudo-nitzschia species, as responses to pollutants or to other environmental stressors could be strongly influence by associated bacteria.}, keywords = {{D}iatoms ; {P}seudo-nitzschia ; {PAH}s mixtures ; {B}iodegradation ; {E}co-toxicology ; {TUNISIE} ; {BIZERTE} {LAGUNE}}, booktitle = {}, journal = {{E}cotoxicology and {E}nvironmental {S}afety}, volume = {214}, numero = {}, pages = {112082 [10 ]}, ISSN = {0147-6513}, year = {2021}, DOI = {10.1016/j.ecoenv.2021.112082}, URL = {https://www.documentation.ird.fr/hor/fdi:010081273}, }