Scientific reports, 2015-06, Vol.5 (1), p.11618-11618, Article 11618
2015
Details
- Autor(en) / Beteiligte
- Titel
- Phytotoxic Mechanism of Nanoparticles: Destruction of Chloroplasts and Vascular Bundles and Alteration of Nutrient Absorption
- Ist Teil von
- Scientific reports, 2015-06, Vol.5 (1), p.11618-11618, Article 11618
- Ort / Verlag
- England: Nature Publishing Group
- Erscheinungsjahr
- 2015
- Link zum Volltext
- Quelle
- Electronic Journals Library
- Beschreibungen/Notizen
- This study focused on determining the phytotoxic mechanism of CeO2 nanoparticles (NPs): destroying chloroplasts and vascular bundles and altering absorption of nutrients on conventional and Bt-transgenic cottons. Experiments were designed with three concentrations of CeO2 NPs including: 0, 100 and 500 mg·L(-1), and each treatment was three replications. Results indicate that absorbed CeO2 nanoparticles significantly reduced the Zn, Mg, Fe, and P levels in xylem sap compared with the control group and decreased indole-3-acetic acid (IAA) and abscisic acid (ABA) concentrations in the roots of conventional cotton. Transmission electron microscopy (TEM) images revealed that CeO2 NPs were absorbed into the roots and subsequently transported to the stems and leaves of both conventional and Bt-transgenic cotton plants via xylem sap. In addition, the majority of aggregated CeO2 NPs were attached to the external surface of chloroplasts, which were swollen and ruptured, especially in Bt-transgenic cotton. The vascular bundles were destroyed by CeO2 nanoparticles, and more damage was observed in transgenic cotton than conventional cotton.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 2045-2322eISSN: 2045-2322DOI: 10.1038/srep11618Titel-ID: cdi_pubmedcentral_primary_oai_pubmedcentral_nih_gov_4479828
- Format
- –
- Schlagworte
- Abscisic acid, Abscisic Acid - metabolism, Biological Transport, Cerium - chemistry, Cerium - toxicity, Chloroplasts, Chloroplasts - drug effects, Chloroplasts - metabolism, Chloroplasts - ultrastructure, Cotton, Electron microscopy, Gossypium - drug effects, Gossypium - genetics, Gossypium - metabolism, Indoleacetic acid, Indoleacetic Acids - metabolism, Iron - metabolism, Magnesium - metabolism, Metal Nanoparticles - chemistry, Metal Nanoparticles - toxicity, Metal Nanoparticles - ultrastructure, Microscopy, Electron, Transmission, Nanoparticles, Nutrients, Phosphorus - metabolism, Plant Leaves - drug effects, Plant Leaves - metabolism, Plant Leaves - ultrastructure, Plant Roots - drug effects, Plant Roots - metabolism, Plant Roots - ultrastructure, Plant Shoots - drug effects, Plant Shoots - metabolism, Plant Shoots - ultrastructure, Plants, Genetically Modified, Roots, Stems, Transgenic plants, Transmission electron microscopy, Xylem, Xylem - drug effects, Xylem - metabolism, Xylem - ultrastructure, Zinc - metabolism