Effets des SCCP sur la reproduction sexuelle de Brachionys calyciflorus: une étude populationelle et biomoléculaire | Effects of SCCPs on the sexual reproduction of Brachionus calyciflorus: A populational and biomolecular study
2022
Jaegers, Jeremy | Michaux, Caroline | Ducenne, Audrey | Gismondi, Eric | Joaquim-Justo, Célia
English. peer reviewed
Show more [+] Less [-]English. Short-Chain Chlorinated Paraffins (SCCPs) are ubiquitous, persistent chemicals which toxicityand potential impacts to aquatic ecosystems have been overlooked for many years. This studyaims at determining the impact of these chemicals on rotifers. As sexual reproduction is oftenmore sensitive to toxicants than amictic reproduction, this study focuses on endpointsdescribing sexual reproduction and on the impact on the gene expression of three receptorsassociated or suspected to be associated with reproduction the RXR, RAR and MAPRreceptors. 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, restingegg 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 SCCPsincrease mixis rate but decrease fertilization rate, which leads to unaltered resting eggproduction. Impacts on mRNA levels of RXR, RA and MAPR were also noted and similaritiesbetween these biomolecular impacts and the reproduction study were observed.
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