Effects of SCCPs on the sexual reproduction of Brachionus calyciflorus: A populational and biomolecular study | Effets des SCCP sur la reproduction sexuelle de Brachionys calyciflorus: une étude populationelle et biomoléculaire
2022
Jaegers, Jeremy | Michaux, Caroline | Ducenne, Audrey | Gismondi, Eric | Joaquim-Justo, Célia
anglais. peer reviewed
Afficher plus [+] Moins [-]anglais. Short-Chain Chlorinated Paraffins (SCCPs) are ubiquitous, persistent chemicals which toxicity and potential impacts to aquatic ecosystems have been overlooked for many years. This study aims at determining the impact of these chemicals on rotifers. As sexual reproduction is often more sensitive to toxicants than amictic reproduction, this study focuses on endpoints describing sexual reproduction and on the impact on the gene expression of three receptors associated or suspected to be associated with reproduction the RXR, RAR and MAPR receptors. Brachionus calyciflorus was exposed to environmental concentrations of SCCPs(10, 100 and 1000 ng/L) and the impact on sexual reproduction (mixis rate, fertilization rate, resting egg production, gamete production) was assessed. Variations in the gene expression of RXR, RAR and MAPR were also studied through mRNA analysis. Our results show that SCCPs increase mixis rate but decrease fertilization rate, which leads to unaltered resting egg production. Impacts on mRNA levels of RXR, RA and MAPR were also noted and similarities between these biomolecular impacts and the reproduction study were observed.
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