| Registro completo |
| Provedor de dados: |
ArchiMer
|
| País: |
France
|
| Título: |
Capacity of the potentially toxic diatoms Pseudo-nitzschia mannii and Pseudo-nitzschia hasleana to tolerate polycyclic aromatic hydrocarbons
|
| Autores: |
Ben Garali, Sondes Melliti
Sahraoui, Ines
Ben Othman, Hiba
Kouki, Abdessalem
De La Iglesia, Pablo
Diogene, Jorge
Lafabrie, Celine
Andree, Karl B.
Fernandez-tejedor, Margarita
Mejri, Kaouther
Meddeb, Marouan
Pringault, Olivier
Hlaili, Asma Sakka
|
| Data: |
2021-05
|
| Ano: |
2021
|
| Palavras-chave: |
Diatoms
Pseudo-nitzschia
PAHs mixtures
Biodegradation
Eco-toxicology
|
| Resumo: |
This study investigates the effects of polycyclic aromatic hydrocarbons (PAHs) on two potentially toxic Pseudonitzschia hasleana and P. mannii, isolated from a PAH contaminated marine environment. Both species, maintained in non-axenic cultures, have been exposed during 144 h to increasing concentrations of a 15 PAHs mixture. Analysis of the domoic acid, showed very low concentrations. Dose?response curves for growth and photosynthesis inhibition were determined. Both species have maintained their growth until the end of incubation even at the highest concentration tested (120 ?g l-1), Nevertheless, P mannii showed faster growth and seemed to be more tolerant than P. hasleana. To reduce PAH toxicity, both species have enhanced their biovolume, with a higher increase for P. mannii relative to P hasleana. Both species were also capable of bioconcentrating PAHs and were able to degrade them probably in synergy with their associated bacteria. The highest biodegradation was observed for P. mannii, which could harbored more efficient hydrocarbon-degrading bacteria. This study provides the first evidence that PAHs can control the growth and physiology of potentially toxic diatoms. Future studies should investigate the bacterial community associated with Pseudo-nitzschia species, as responses to pollutants or to other environmental stressors could be strongly influence by associated bacteria.
|
| Tipo: |
Text
|
| Idioma: |
Inglês
|
| Identificador: |
https://archimer.ifremer.fr/doc/00690/80215/83300.pdf
DOI:10.1016/j.ecoenv.2021.112082
https://archimer.ifremer.fr/doc/00690/80215/
|
| Editor: |
Academic Press Inc Elsevier Science
|
| Formato: |
application/pdf
|
| Fonte: |
Ecotoxicology And Environmental Safety (0147-6513) (Academic Press Inc Elsevier Science), 2021-05 , Vol. 214 , P. 112082 (10p.)
|
| Direitos: |
info:eu-repo/semantics/openAccess
restricted use
|
|
