Publications: Peer-reviewed journal articles (by staff)

The role of ethylenediaminetetraacetic acid in green-lipped mussel (Perna canaliculus) embryo development: A biochemical and morphological characterization

7 May, 2016
CITATION

Gale S L, Burrit DJ and Adams SL 2016. The role of ethylenediaminetetraacetic acid in green-lipped mussel (Perna canaliculus) embryo development: A biochemical and morphological characterization. Aquaculture 463: 22-27.

DOI link here

ABSTRACT

The purpose of this study was to determine the effects of adding ethylenediaminetetraacetic acid (EDTA) into the fertilization (50 μM) and embryo incubation (25 μM) seawater of Perna canaliculus. With EDTA, 78.6% of oocytes developed to D-larvae in comparison to 1.2% without EDTA (P < 0.0001). With EDTA; oxidative protein, lipid and DNA damage approximately halved (P < 0.05), and enzymatic antioxidant levels decreased by: 30% catalase (CAT; P < 0.005), 37.5% glutathione peroxidase (GPOX; P < 0.05), 44.4% glutathione S-transferase (GST; P < 0.005), 26.3% glutathione reductase (GR; P < 0.05); whilst superoxide dismutase (SOD) did not change significantly. With EDTA, levels of the non-enzymatic antioxidant, glutathione (GSH), declined by 44.6% (P < 0.05), whilst total glutathione did not change significantly. Observations of embryos (1–12 h post-fertilization [hpf]), using light and transmission electron microscopy, showed that with EDTA there were more blastomeres at 1 and 6 hpf, and fewer ultrastructure abnormalities, compared to embryos without EDTA. We conclude that, developmental arrest, oxidative stress and cellular abnormalities occurred without the addition of EDTA to the seawater used for P. canaliculus embryo culture. We suggest further work to understand EDTA's role as a chelating agent.