Article (Scientific journals)
Effects of short-chain chlorinated paraffins on the sexual reproduction of Brachionus calyciflorus: a populational and biomolecular study
Jaegers, Jeremy; Michaux, Caroline; Gismondi, Eric et al.
2023In Hydrobiologia
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Keywords :
SCCP; Rotifer; Real-time PCR; Chronic toxicity; Gene expression
Abstract :
[en] Short- Chain Chlorinated Paraffins (SCCPs) are ubiquitous, persistent chemicals whose toxicity and potential impacts on aquatic ecosystems have been overlooked for many years. This study aims to determine 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 with reproduction: retinoid-x-receptor (rxr), retinoid activated receptor (rar) and Membrane-Associated Progesterone Receptor (mapr). 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 and viability, inter-generational effects) was assessed. Variations in the gene expressions of rxr, rar and mapr were also studied through RT-qPCR analysis. Our results show that SCCPs increase the mixis rate but decrease the fertilization rate, leading to unaltered resting egg production. Exposure to SCCPs also affected the mRNA levels of the studied receptors in ways which could be linked to observed changes in mixis and fertilization rates.
Research Center/Unit :
FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège
Disciplines :
Aquatic sciences & oceanology
Biochemistry, biophysics & molecular biology
Environmental sciences & ecology
Author, co-author :
Jaegers, Jeremy ;  Université de Liège - ULiège > Freshwater and OCeanic science Unit of reSearch (FOCUS)
Michaux, Caroline
Gismondi, Eric ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Ecologie animale et écotoxicologie
Joaquim-Justo, Célia ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Ecologie animale et écotoxicologie
Language :
English
Title :
Effects of short-chain chlorinated paraffins on the sexual reproduction of Brachionus calyciflorus: a populational and biomolecular study
Publication date :
31 August 2023
Journal title :
Hydrobiologia
ISSN :
0018-8158
eISSN :
1573-5117
Publisher :
Springer, Dordrecht, Netherlands
Special issue title :
S.I.: Rotifera XVI (Spoljar et al.)
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
Parachloreco
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique
Funding number :
FC 36575
Available on ORBi :
since 12 September 2023

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