Design Defines the Effects of Nanoceria at a Low Dose on Soil Microbiota and the Potentiation of Impacts by the Canola Plant - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Environmental Science and Technology Année : 2016

Design Defines the Effects of Nanoceria at a Low Dose on Soil Microbiota and the Potentiation of Impacts by the Canola Plant

Résumé

Soils act as nanoceria sinks via agricultural spreading and surface waters. Canola plants were grown for one month in soil spiked with nanoceria (1 mg·kg–1). To define the role of nanomaterials design on environmental impacts, we studied nanoceria with different sizes (3.5 or 31 nm) and coating (citrate). We measured microbial activities involved in C, N, and P cycling in the rhizosphere and unplanted soil. Bacterial community structure was analyzed in unplanted soil, rhizosphere, and plant roots by 454-pyrosequencing of the 16S rRNA gene. This revealed an impact gradient dependent on nanomaterials design, ranging from decreased microbial enzymatic activities in planted soil to alterations in bacterial community structure in roots. Particle size/aggregation was a key parameter in modulating nanoceria effects on root communities. Citrate coating lowered the impact on microbial enzymatic activities but triggered variability in the bacterial community structure near the plant root. Some nanoceria favored taxa whose closest relatives are hydrocarbon-degrading bacteria and disadvantaged taxa frequently associated in consortia with disease-suppressive activity toward plant pathogens. This work provides a basis to determine outcomes of nanoceria in soil, at a dose close to predicted environmental concentrations, and to design them to minimize these impacts.
Fichier principal
Vignette du fichier
s1-ln2128214-1831201494-1939656818Hwf-1221205459IdV18140405492128214PDF_HI0001.pdf (2.65 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-01427499 , version 1 (10-02-2022)

Identifiants

Citer

Mohamed Hamidat, ​mohamed Barakat, Philippe Ortet, Corinne Chanéac, Jérôme Rose, et al.. Design Defines the Effects of Nanoceria at a Low Dose on Soil Microbiota and the Potentiation of Impacts by the Canola Plant. Environmental Science and Technology, 2016, 50 (13), pp.6892-6901. ⟨10.1021/acs.est.6b01056⟩. ⟨hal-01427499⟩
319 Consultations
79 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More