Inhibitory effects of silver nanoparticles in two green algae, Chlorella vulgaris and Dunaliella tertiolecta

Abdallah Oukarroum, Sébastien Bras, François Perreault, Radovan Popovic

Research output: Contribution to journalArticle

212 Scopus citations

Abstract

Freshwater microalga Chlorella vulgaris and marine microalga Dunaliella tertiolecta were used to investigate toxic effects induced by 50. nm silver nanoparticles (AgNPs). To induce AgNPs effect, we exposed Chlorella vulgaris and Dunaliella tertiolecta for 24. h to 0-10. mg/L. We showed that growth media had different effects in AgNPs agglomerates' formation. Cellular viability, reactive oxygen species (ROS) formation and lipids peroxidation were employed to assess the toxic effects of AgNPs. AgNPs were able to interact directly with the Chlorella vulgaris cells surface and large aggregates were observed. AgNPs have a negative effect on Chlorella vulgaris and Dunaliella tertiolecta, as manifested by a strong decrease in chlorophyll content, viable algal cells, increased ROS formation and lipids peroxidation. The variability in sensitivity of both algae towards AgNPs was observed. We conclude that AgNPs have a negative effect on aquatic algae and these alterations might have serious consequences on structure and function of aquatic plant communities.

Original languageEnglish (US)
Pages (from-to)80-85
Number of pages6
JournalEcotoxicology and Environmental Safety
Volume78
DOIs
StatePublished - Apr 1 2012
Externally publishedYes

Keywords

  • Chlorella vulgaris
  • Dunaliella tertiolecta
  • Lipids peroxidation
  • Reactive oxygen species
  • Silver nanoparticles

ASJC Scopus subject areas

  • Pollution
  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis

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