n/a
Abstract Title:

Microplastics modify the toxicity of glyphosate on Daphnia magna.

Abstract Source:

Sci Total Environ. 2019 Aug 30 ;697:134194. Epub 2019 Aug 30. PMID: 31491639

Abstract Author(s):

Myriam Zocchi, Ruben Sommaruga

Article Affiliation:

Myriam Zocchi

Abstract:

Plastic contamination is an environmental problem spreading to even the most remote aquatic and terrestrial habitats and in particular, microplastics represent an uncertain threat for organisms. Microplastics can have a direct negative effect, but they can also potentially modify the toxicity and bioavailability of pollutants. Here, we tested over 1 week the combined effect of three different glyphosate chemical formulations (glyphosate acid, glyphosate-monoisopropylamine salt, and Roundup Gran) and two types of microplastics (polyethylene (PE) microbeads and polyethylene terephthalate/polyamide (PET/PA) fibers), on Daphnia magna. Glyphosate-monoisopropylamine salt caused the highest mortality after 1 week exposure (23.3%), whereas glyphosate acid the lowest (12.5%), when tested in the absence of microplastics. These results were inverted, however, when the individuals were exposed in combination with the PE microbeads (glyphosate acid: 53.3% and glyphosate-monoisopropylamine salt: 18.3%) or the PET/PA fibers (glyphosate acid: 30.0% and glyphosate-monoisopropylamine salt: 8.3%). The mortality in the Roundup Gran formulation also increased when combined with the two microplastics, though the effect was less pronounced. In all experiments, the effect of the treatments and time was significant, though there was no significant interaction between them. In most treatments, negative effects were not observed after 48 h or later. The change in toxicity of the glyphosate formulations caused by microplastics can be linked to thedifferent sorption properties of the glyphosate-based chemicals formulations. The outcome of this study highlights that beside the potential direct negative effects of microplastics, they can modify the toxicity of pollutants, such as herbicides.

Study Type : Insect Study

Print Options


Key Research Topics

Sayer Ji
Founder of GreenMedInfo.com

Subscribe to our informative Newsletter & get Nature's Evidence-Based Pharmacy

Our newsletter serves 500,000 with essential news, research & healthy tips, daily.

Download Now

500+ pages of Natural Medicine Alternatives and Information.

This website is for information purposes only. By providing the information contained herein we are not diagnosing, treating, curing, mitigating, or preventing any type of disease or medical condition. Before beginning any type of natural, integrative or conventional treatment regimen, it is advisable to seek the advice of a licensed healthcare professional.

© Copyright 2008-2020 GreenMedInfo.com, Journal Articles copyright of original owners, MeSH copyright NLM.