Back to Search
Start Over
Exogenous salicylic acid alleviates the accumulation of pesticides and mitigates pesticide-induced oxidative stress in cucumber plants (Cucumis sativus L.).
- Source :
-
Ecotoxicology and environmental safety [Ecotoxicol Environ Saf] 2021 Jan 15; Vol. 208, pp. 111654. Date of Electronic Publication: 2020 Nov 20. - Publication Year :
- 2021
-
Abstract
- Salicylic acid (SA) is an important signal molecule, regulating oxidative stress response in plants. In this study, we evaluated the influences of SA (1 mg L <superscript>-1</superscript> , 10 mg L <superscript>-1</superscript> and 50 mg L <superscript>-1</superscript> ) on the accumulation of clothianidin (CLO), dinotefuran (DFN) and difenoconazole (DFZ) (5 mg L <superscript>-1</superscript> ) and pesticide-induced (CLO-10 mg L <superscript>-1</superscript> , DFN-20 mg L <superscript>-1</superscript> , and DFZ-10 mg L <superscript>-1</superscript> ) oxidative stress in cucumber plants. Exogenous SA at 10 mg L <superscript>-1</superscript> significantly reduced the half-lives of three pesticides in nutrient solution and prevented the accumulation of pesticides in roots and leaves. And the role of SA in reducing residues was related to the major accumulation sites of pesticides. By calculating the root concentration factor (RCF) and translocation factor (TF), we found that SA at 10 mg L <superscript>-1</superscript> reduced the ability of roots to absorb pesticides and enhanced the translocation ability from roots to leaves. Roots exposed to high concentrations of three pesticides could reduce biomass, low chlorophyll content, increase the accumulation of reactive oxygen species (ROS) and proline, promote lipid peroxidation, and alter the activities of a range of antioxidant enzymes, respectively. Exogenous SA at low concentrations (1 mg L <superscript>-1</superscript> and 10 mg L <superscript>-1</superscript> ) significantly mitigated these negative effects. Hence, application of exogenous SA at 10 mg L <superscript>-1</superscript> could effectively alleviate the accumulation of pesticides and induce stress tolerance in cucumber planting systems.<br /> (Copyright © 2020 The Authors. Published by Elsevier Inc. All rights reserved.)
- Subjects :
- Antioxidants metabolism
Chlorophyll metabolism
Cucumis sativus metabolism
Lipid Peroxidation drug effects
Pesticides toxicity
Plant Leaves drug effects
Plant Leaves metabolism
Proline metabolism
Reactive Oxygen Species metabolism
Cucumis sativus drug effects
Oxidative Stress drug effects
Pesticides metabolism
Salicylic Acid pharmacology
Subjects
Details
- Language :
- English
- ISSN :
- 1090-2414
- Volume :
- 208
- Database :
- MEDLINE
- Journal :
- Ecotoxicology and environmental safety
- Publication Type :
- Academic Journal
- Accession number :
- 33396168
- Full Text :
- https://doi.org/10.1016/j.ecoenv.2020.111654