Interaction of Cerium Oxide Nanoparticles and Ionic Cerium with Duckweed (Lemna minor L.): Uptake, Distribution, and Phytotoxicity.

ABSTRACT: As one of the most widely used nanomaterials, CeO₂ nanoparticles (NPs) might be released into the aquatic environment. In this paper, the interaction of CeO₂ NPs and Ce³⁺ ions (0~10 mg/L) with duckweed (Lemna minor L.) was investigated. CeO₂ NPs significantly inhibited the root elongation of duckweed at concentrations higher than 0.1 mg/L, while the inhibition threshold of Ce³⁺ ions was 0.02 mg/L. At high doses, both reduced photosynthetic pigment contents led to cell death and induced stomatal deformation, but the toxicity of Ce³⁺ ions was greater than that of CeO₂ NPs at the same concentration. According to the in situ distribution of Ce in plant tissues by μ-XRF, the intensity of Ce signal was in

SUBMITTER: Liu Y 

PROVIDER: S-EPMC10535116 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature