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Environ Pollut. 2018 Feb;233:623-632. doi: 10.1016/j.envpol.2017.10.100. Epub 2017 Nov 5.

Ecotoxicological risk assessment for the herbicide glyphosate to non-target aquatic species: A case study with the mussel Mytilus galloprovincialis.

Author information

1
Department of Biology, University of Padova, Via Ugo Bassi 58/B, 35131 Padova, Italy. Electronic address: matozzo@bio.unipd.it.
2
Department of Biology, University of Padova, Via Ugo Bassi 58/B, 35131 Padova, Italy.
3
Department of Statistical Sciences, University of Padova, Via Cesare Battisti 241, 35121 Padova, Italy.
4
Department of Developmental Psychology and Socialisation, University of Padova, Via Venezia 8, 35131 Padova, Italy.
5
Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131 Padova, Italy.

Abstract

Glyphosate (GLY) is one of the most used herbicide worldwide. Considering that information concerning the impact of GLY on bivalves is scarce, in this study we evaluated for the first time the effects of environmentally realistic concentrations of GLY (10, 100 and 1000 μg/L) to the mussel Mytilus galloprovincialis. Mussels were exposed for 7, 14 and 21 days and several biomarkers were measured in haemocytes/haemolymph (total haemocyte counts, haemocyte diameter and volume, haemolymph pH, haemolymph lactate dehydrogenase activity, haemocyte lysate lysozyme and acid phosphatase activities), as well as in gills and digestive gland (antioxidant enzyme and acetylcholinesterase activities). The concentrations of GLY and its main metabolite aminomethylphosphonic acid in the experimental tanks were also measured. The MANOVA analysis demonstrated that the experimental variables considered (exposure concentration, exposure duration, and their interaction) affected significantly biomarker responses. In addition, the two-way ANOVA analysis indicated that GLY was able to affect most of the cellular parameters measured, whereas antioxidant enzyme activities resulted to be influenced moderately. Interestingly, exposure to GLY reduced significantly acetylcholinesterase activity in gills. Although preliminary, the results of this study demonstrated that GLY can affect both cellular and biochemical parameters in mussels, highlighting a potential risk for aquatic invertebrates.

KEYWORDS:

Biomarker; Glyphosate; Herbicide; Mussel

PMID:
29107902
DOI:
10.1016/j.envpol.2017.10.100
[Indexed for MEDLINE]

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