Wheat chronic exposure to TiO2-nanoparticles Cyto- and genotoxic approach

Wheat chronic exposure to TiO2-nanoparticles : Cyto- and genotoxic approach

Copyright © 2017 Elsevier Masson SAS. All rights reserved.

Bibliographische Detailangaben
Veröffentlicht in:Plant physiology and biochemistry : PPB. - 1991. - 121(2017) vom: 01. Dez., Seite 89-98
1. Verfasser: Silva, Sónia (VerfasserIn)
Weitere Verfasser: Craveiro, Sandra C, Oliveira, Helena, Calado, António J, Pinto, Ricardo J B, Silva, Artur M S, Santos, Conceição
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2017
Zugriff auf das übergeordnete Werk:Plant physiology and biochemistry : PPB
Schlagworte:Journal Article Biomarkers Cytotoxicity Genotoxicity Nanotoxicology Phytotoxicity Uptake titanium dioxide 15FIX9V2JP Titanium D1JT611TNE
Beschreibung
Zusammenfassung:Copyright © 2017 Elsevier Masson SAS. All rights reserved.
This study investigates the phytotoxicity of chronic exposure (up to 20 d) of different TiO2 nanoparticles (TiO2-NP) concentrations (5, 50, 150 mg L-1) in Triticum aestivum. Germination was not affected by TiO2-NP exposure and seedling shoot length (3 d) was enhanced. Contrarily, plants' shoot growth (20 d) was impaired. Effects on membrane permeability and total antioxidant capacity in TiO2-NP chronic exposure were organ dependent: increased in leaves and decreased in roots. Roots also showed lower levels of lipid peroxidation. Flow cytometry revealed no changes in ploidy levels as well as in the cell cycle dynamics for both organs. However, TiO2-NP induced clastogenic effects in roots with increases in micronucleated cells in root tips in a dose dependent manner. Also, increases of DNA single/double strand breaks were found in leaves, and effects were similar to all doses. Ti uptake and translocation to leaves were confirmed by ICP-MS, which was dependent on NP concentration. Overall, these data indicate that TiO2-NP phytotoxicity is more severe after longer exposure periods, higher doses and more severe for shoots than roots. The observed effects are a result of both direct and indirect (oxidative stress and/or water imbalances) action of TiO2-NP. Additionally, results highlight the negative impact that TiO2-NP may have on crop growth and production and to the risk of trophic transfer
Beschreibung:Date Completed 29.05.2018
Date Revised 30.09.2020
published: Print-Electronic
Citation Status MEDLINE
ISSN:1873-2690
DOI:10.1016/j.plaphy.2017.10.013