Sensitivity of the macrophytes Pistia stratiotes and Eichhornia crassipes to hexazinone and dissipation of this pesticide in aquatic ecosystems
| Autor: | Matheus de Freitas Souza, José Barbosa dos Santos, Brenda Thaís Barbalho Alencar, Dayana Maria Teodoro Francino, Victor Hugo Vidal Ribeiro, Vitor Antunes Martins da Costa, Daniel Valadão Silva, Naiane Maria Correa dos Santos |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Eichhornia crassipes
Aquatic Organisms Health Toxicology and Mutagenesis chemistry.chemical_compound Rivers Aquatic plant Araceae Pistia Stratiotes Pesticides Groundwater Ecosystem biology Triazines Aquatic ecosystem Public Health Environmental and Occupational Health General Medicine Pesticide biology.organism_classification Pollution Hexazinone Macrophyte Biodegradation Environmental Eichhornia chemistry Agronomy Environmental science Water Pollutants Chemical |
| Zdroj: | Ecotoxicology and Environmental Safety. 168:177-183 |
| ISSN: | 0147-6513 |
| DOI: | 10.1016/j.ecoenv.2018.10.021 |
| Popis: | Herbicide wastes from agriculture areas can contaminate water resources and affect non-target organisms. Since herbicides reach groundwater and rivers, these residues can damage the aquatic ecosystem. Hexazinone is an herbicide widely used in sugarcane cultivation and has a potential to contaminate water resources. Therefore, studies are necessary to know the possible damages of this herbicide on aquatic organisms, as well as the behavior of this pesticide in those systems. In this study, our objective was to evaluate the sensitivity of the macrophytes Pistia stratiotes and Eichhornia crassipes to hexazinone, as well as the dissipation of these pesticides. The variables intoxication, fresh matter accumulation, and leaf anatomy were used to evaluate the sensitivity of the macrophytes to hexazinone. The hexazinone concentration in water was performed by HPLC-MS. Hexazinone concentrations equivalent to 111 and 333 μg L−1 were toxic to the macrophytes. Pistia stratiotes produced less fresh matter production than Eichhornia crassipes when exposed to the hexazinone. The hexazinone application did not change the adaxial epidermic (EAD), abaxial epidermic (EAB), palisade parenchyma (PP), aerenchyma (AER) and leaf blade (LAF) of Pistia stratiotes at any concentration tested. Concentrations equivalent to 333 μg L−1 changed the PP and LAF of Eichhornia crassipes. The presence of this herbicide in water negatively affects the fresh matter accumulation and leaf structure of the Pistia stratiotes and Eichhornia crassipes, respectively. The presence of these macrophytes delayed the dissipation of hexazinone due to them impair other pathways of degradation of this herbicide in aquatic environments. The presence of this herbicide in water negatively affects the growth and development of the Pistia stratiotes and Eichhornia crassipes. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect