Experimental evolution of post-ingestive nutritional compensation in response to a nutrient-poor diet.

Détails

Ressource 1Télécharger: Cavigliasso et al_2020_RSPB.pdf (577.05 [Ko])
Etat: Public
Version: Final published version
Licence: CC BY 4.0
ID Serval
serval:BIB_3126ADBA08AB
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Experimental evolution of post-ingestive nutritional compensation in response to a nutrient-poor diet.
Périodique
Proceedings. Biological sciences
Auteur⸱e⸱s
Cavigliasso F., Dupuis C., Savary L., Spangenberg J.E., Kawecki T.J.
ISSN
1471-2954 (Electronic)
ISSN-L
0962-8452
Statut éditorial
Publié
Date de publication
09/12/2020
Peer-reviewed
Oui
Volume
287
Numéro
1940
Pages
20202684
Langue
anglais
Notes
Publication types: Journal Article
Publication Status: ppublish
Résumé
The geometric framework of nutrition predicts that populations restricted to a single imbalanced diet should evolve post-ingestive nutritional compensation mechanisms bringing the blend of assimilated nutrients closer to physiological optimum. The evolution of such nutritional compensation is thought to be mainly driven by the ratios of major nutrients rather than overall nutritional content of the diet. We report experimental evolution of divergence in post-ingestive nutritional compensation in populations of Drosophila melanogaster adapted to diets that contained identical imbalanced nutrient ratios but differed in total nutrient concentration. Larvae from 'Selected' populations maintained for over 200 generations on a nutrient-poor diet with a 1 : 13.5 protein : carbohydrate ratio showed enhanced assimilation of nitrogen from yeasts and reduced assimilation of carbon from sucrose than 'Control' populations evolved on a diet with the same nutrient ratio but fourfold greater nutrient concentration. Compared to the Controls, the Selected larvae also accumulated less triglycerides relative to protein. This implies that the Selected populations evolved a higher assimilation rate of amino acids from the poor imbalanced diet and a lower assimilation of carbohydrates than Controls. Thus, the evolution of nutritional compensation may be driven by changes in total nutrient abundance, even if the ratios of different nutrients remain unchanged.
Mots-clé
Drosophila, geometric framework for nutrition, limiting nutrient, malnutrition, nutrient assimilation, unbalanced diet
Pubmed
Open Access
Oui
Financement(s)
Fonds national suisse / Projets / 31003A_162732
Création de la notice
07/12/2020 14:14
Dernière modification de la notice
21/09/2022 6:09
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