Phospholipid-bound eicosapentaenoic acid (EPA) supports higher fecundity than free EPA in Daphnia magna

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2017
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Denoux, Clémence
Koussoroplis, Apostolos-Manuel
Perriere, Fanny
Desvillettes, Christian
Bourdier, Gilles
Bec, Alexandre
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Journal of Plankton Research. 2017, 39(5), pp. 843-848. ISSN 0142-7873. eISSN 1464-3774. Available under: doi: 10.1093/plankt/fbx037
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Nutrition bioassays in which polyunsaturated fatty acids (PUFA)-deficient diets were supplemented with free long-chain PUFA (≥C20) consistently revealed positive effects on somatic growth and fecundity of Daphnia. However, free PUFA are hardly available in natural diets. In general, PUFA are bound to other lipids, especially to phospholipids and triglycerides. Here, we evaluate the potential of free and phospholipid-bound dietary eicosapentaenoic acid (EPA) to support somatic growth and fecundity of Daphnia magna. In a growth experiment, supplementation of a C20 PUFA-deficient diet with free or phospholipid-bound EPA improved somatic growth rates of D. magna equally. However, the increase in fecundity was significantly more pronounced when phospholipid-bound EPA was provided. Free and phospholipid-bound EPA were provided in the same concentrations in our experiment, suggesting that the allocation to reproduction-related processes is affected differently by phospholipid-bound PUFA and free PUFA. Our finding stresses the need to consider the distribution of dietary PUFA in different lipid classes to gain a better understanding of how PUFA influence life history traits of Daphnids in the field.

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ISO 690DENOUX, Clémence, Dominik MARTIN-CREUZBURG, Apostolos-Manuel KOUSSOROPLIS, Fanny PERRIERE, Christian DESVILLETTES, Gilles BOURDIER, Alexandre BEC, 2017. Phospholipid-bound eicosapentaenoic acid (EPA) supports higher fecundity than free EPA in Daphnia magna. In: Journal of Plankton Research. 2017, 39(5), pp. 843-848. ISSN 0142-7873. eISSN 1464-3774. Available under: doi: 10.1093/plankt/fbx037
BibTex
@article{Denoux2017Phosp-41764,
  year={2017},
  doi={10.1093/plankt/fbx037},
  title={Phospholipid-bound eicosapentaenoic acid (EPA) supports higher fecundity than free EPA in Daphnia magna},
  number={5},
  volume={39},
  issn={0142-7873},
  journal={Journal of Plankton Research},
  pages={843--848},
  author={Denoux, Clémence and Martin-Creuzburg, Dominik and Koussoroplis, Apostolos-Manuel and Perriere, Fanny and Desvillettes, Christian and Bourdier, Gilles and Bec, Alexandre}
}
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