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Biosynthesis of gold nanoparticles by the living freshwater diatom Eolimna minima, a species developed in river biofilms.

hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorFEURTET-MAZEL, Agnès
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMORNET, Stéphane
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorCHARRON, Laëtitia
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorMESMER-DUDONS, Nathalie
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorMAURY-BRACHET, Régine
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorBAUDRIMONT, Magalie
dc.date.issued2016
dc.identifier.issn0944-1344
dc.description.abstractEnTesting biotransformation capacities of living aquatic microalgae diatoms to naturally synthetize gold nanoparticles (AuNP) from gold salts and assessing aftereffects on their viability by microscope observations is a great challenge. In this work, a laboratory experiment was conducted, which aimed to observe (i) directly by transmission electronic and light microscopy and (ii) through indirect measurements (UV-visible spectroscopy) the periphytic freshwater diatom Eolimna minima exposed to gold salts. This work revealed the capacity of E. minima to intracellularly biosynthetize AuNP and to tolerate it. AuNP synthesis appears as a mechanism of detoxification to protect diatom from gold salt contamination. We also pointed out the risks associated with the spread of diatoms full of AuNP, through the trophic web of freshwater ecosystems. The preponderant part of the diatoms in natural biofilms associated with their position at the basis of the trophic webs in rivers could then make them responsible for the contamination of their consumers (grazer animals) and consequently for the potential release of AuNP through the entire food web.
dc.description.sponsorshipApproches à différentes échelles pour caractériser les interactions cellulaires, le transfert trophique et les impacts toxiques de nanoparticules métalliques chez les organismes aquatiques
dc.language.isoen
dc.publisherSpringer Verlag
dc.subject.enPeriphytic microalgae
dc.subject.enDiatom
dc.subject.enAquatic environment
dc.subject.enBiomineralization of gold salts
dc.subject.enGold nanoparticles
dc.subject.enContamination
dc.subject.enMicroscopy
dc.subject.enLaboratory experiment
dc.title.enBiosynthesis of gold nanoparticles by the living freshwater diatom Eolimna minima, a species developed in river biofilms.
dc.typeArticle de revue
dc.identifier.doi10.1007/s11356-015-4139-x
dc.subject.halSciences de l'environnement/Biodiversité et Ecologie
dc.subject.halSciences du Vivant [q-bio]/Microbiologie et Parasitologie
bordeaux.journalEnvironmental Science and Pollution Research
bordeaux.page4334-4339
bordeaux.volume23
bordeaux.issue5
bordeaux.peerReviewedoui
hal.identifierhal-01282833
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01282833v1
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