Comparing the impacts of macronutrients on life-history traits in larval and adult Drosophila melanogaster : the use of nutritional geometry and chemically defined diets

The Journal of Experimental Biology
Taehwan Jang, Kwang Pum Lee

Abstract

Protein and carbohydrate are the two major macronutrients that exert profound influences over fitness in many organisms, including Drosophila melanogaster. Our understanding of how these macronutrients shape the components of fitness in D. melanogaster has been greatly enhanced by the use of nutritional geometry, but most nutritional geometric analyses on this species have been conducted using semi-synthetic diets that are not chemically well defined. Here, we combined the use of nutritional geometry and chemically defined diets to compare the patterns of larval and adult life-history traits expressed across 34 diets systematically varying in protein:carbohydrate (P:C) ratio and in protein plus carbohydrate (P+C) concentration. The shape of the response surfaces constructed for all larval and adult traits differed significantly from one another, with the nutritional optima being identified at P:C 1:4 for lifespan (P+C 120 g l-1), 1:2 for egg-to-adult viability (120 g l-1), 1:1 for female body mass at adult eclosion (240 g l-1) and lifetime fecundity (360 g l-1), 2:1 for larval developmental rate (60 g l-1) and 8:1 for egg production rate (120 g l-1). Such divergence in nutritional optima among life-history traits indicates that...Continue Reading

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Citations

May 7, 2020·G3 : Genes - Genomes - Genetics·Danielle N A Lesperance, Nichole A Broderick
Aug 4, 2019·Biogerontology·Sudhakar Krittika, Pankaj Yadav
Jul 31, 2020·BMC Evolutionary Biology·Peter KlepsatelMartina Gáliková
Aug 16, 2019·Current Zoology·Stéphane KrausMathieu Lihoreau
Dec 15, 2020·The Journal of Animal Ecology·Rong HouDavid Raubenheimer

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