Back to Search
Start Over
Size evolution in microorganisms masks trade-offs predicted by the growth rate hypothesis
- Source :
- Proceedings of the Royal Society B: Biological Sciences, Proceedings of the Royal Society B: Biological Sciences, Royal Society, The, 2016, 283 (1845), 〈10.1098/rspb.2016.2272〉, Proceedings of the Royal Society B: Biological Sciences, Royal Society, The, 2016, 283 (1845), ⟨10.1098/rspb.2016.2272⟩
- Publication Year :
- 2016
-
Abstract
- Adaptation to local resource availability depends on responses in growth rate and nutrient acquisition. The growth rate hypothesis (GRH) suggests that growing fast should impair competitive abilities for phosphorus and nitrogen due to high demand for biosynthesis. However, in microorganisms, size influences both growth and uptake rates, which may mask trade-offs and instead generate a positive relationship between these traits (size hypothesis, SH). Here, we evolved a gradient of maximum growth rate (μmax) from a single bacterium ancestor to test the relationship amongμmax, competitive ability for nutrients and cell size, while controlling for evolutionary history. We found a strong positive correlation betweenμmaxand competitive ability for phosphorus, associated with a trade-off betweenμmaxand cell size: strains selected for highμmaxwere smaller and better competitors for phosphorus. Our results strongly support the SH, while the trade-offs expected under GRH were not apparent. Beyond plasticity, unicellular populations can respond rapidly to selection pressure through joint evolution of their size and maximum growth rate. Our study stresses that physiological links between these traits tightly shape the evolution of competitive strategies.
- Subjects :
- 0106 biological sciences
0301 basic medicine
stoechiométrie
Microorganism
[SDV]Life Sciences [q-bio]
01 natural sciences
Cell size
2300 General Environmental Science
compétition source puits
Nutrient
2400 General Immunology and Microbiology
Growth rate
bacteria
Research Articles
General Environmental Science
2. Zero hunger
Experimental evolution
Ecology
Trade offs
growth rate hypothesis
Phosphorus
General Medicine
Adaptation, Physiological
Biological Evolution
biodisponibilité du phosphore
stoichiometry
Phenotype
590 Animals (Zoology)
growth rate
General Agricultural and Biological Sciences
Nitrogen
histoire évolutive
chemistry.chemical_element
1100 General Agricultural and Biological Sciences
Biology
taux de croissance
Pseudomonas fluorescens
010603 evolutionary biology
General Biochemistry, Genetics and Molecular Biology
03 medical and health sciences
10127 Institute of Evolutionary Biology and Environmental Studies
1300 General Biochemistry, Genetics and Molecular Biology
experimental evolution
rK strategies
microorganisme
General Immunology and Microbiology
[ SDV ] Life Sciences [q-bio]
030104 developmental biology
chemistry
r/K strategies
570 Life sciences
biology
Adaptation
evolutionary history
Subjects
Details
- Language :
- English
- ISSN :
- 09628452 and 14712954
- Database :
- OpenAIRE
- Journal :
- Proceedings of the Royal Society B: Biological Sciences, Proceedings of the Royal Society B: Biological Sciences, Royal Society, The, 2016, 283 (1845), 〈10.1098/rspb.2016.2272〉, Proceedings of the Royal Society B: Biological Sciences, Royal Society, The, 2016, 283 (1845), ⟨10.1098/rspb.2016.2272⟩
- Accession number :
- edsair.doi.dedup.....26cb9af1affab15695ebb1c3bee7a3b3