Skip to Main content Skip to Navigation
Journal articles

Root-level exposure reveals multiple physiological toxicity of triazine xenobiotics in Arabidopsis thaliana

Abstract : Herbicides are pollutants of great concern due to environmental ubiquity resulting from extensive use in modern agriculture and persistence in soil and water. Studies at various spatial scales have also highlighted frequent occurrences of major herbicide breakdown products in the environment. Analysis of plant behavior toward such molecules and their metabolites under conditions of transient or persistent soil pollution is important for toxicity evaluation in the context of environmental risk assessment. In order to understand the mechanisms underlying the action of such environmental contaminants, the model plant Arabidopsis thaliana, which has been shown to be highly responsive to pesticides and other xenobiotics, was confronted with varying levels of the widely-used herbicide atrazine and of two of its metabolites, desethylatrazine and hydroxyatrazine, which are both frequently detected in water streams of agriculturally-intensive areas. After 24 h of exposure to varying concentrations covering the range of triazine concentrations detected in the environment, root-level contaminations of atrazine, desethylatrazine and hydroxyatrazine were found to affect early growth and development in various dose-dependent and differential manners. Moreover, these differential effects of atrazine, desethylatrazine and hydroxyatrazine pointed to the involvement of distinct mechanisms directly affecting respiration and root development. The consequences of the identification of additional targets, in addition to the canonical photosystem II target, are discussed in relation with the ecotoxicological assessment of environmental xenobiotic contamination.
Complete list of metadatas

https://hal-univ-rennes1.archives-ouvertes.fr/hal-01507697
Contributor : Laurent Jonchère <>
Submitted on : Tuesday, July 4, 2017 - 5:01:37 PM
Last modification on : Monday, April 29, 2019 - 2:30:48 PM
Long-term archiving on: : Friday, December 15, 2017 - 3:05:23 AM

File

Alberto et al. - Root-level ex...
Files produced by the author(s)

Identifiers

Citation

Diana Alberto, Ivan Couée, Cécile Sulmon, Gwenola Gouesbet. Root-level exposure reveals multiple physiological toxicity of triazine xenobiotics in Arabidopsis thaliana. Journal of Plant Physiology, Elsevier, 2017, 212, pp.105-114. ⟨10.1016/j.jplph.2017.01.013⟩. ⟨hal-01507697⟩

Share

Metrics

Record views

274

Files downloads

471