Evolution of bidirectional costly mutualism from byproduct consumption
Abstract
Mutualisms are essential for life, yet it is unclear how they arise. A two-stage process has been proposed for the evolution of mutualisms that involve exchanges of two costly resources. First, costly provisioning by one species may be selected for if that species gains a benefit from costless byproducts generated by a second species, and cooperators get disproportionate access to byproducts. Selection could then drive the second species to provide costly resources in return. Previously, a synthetic consortium evolved the first stage of this scenario: Salmonella enterica evolved costly production of methionine in exchange for costless carbon byproducts generated by an auxotrophic Escherichia coli. Growth on agar plates localized the benefits of cooperation around methionine-secreting S. enterica. Here, we report that further evolution of these partners on plates led to hypercooperative E. coli that secrete the sugar galactose. Sugar secretion arose repeatedly across replicate communities and is costly to E. coli producers, but enhances the growth of S. enterica. The tradeoff between individual costs and group benefits led to maintenance of both cooperative and efficient E. coli genotypes in this spatially structured environment. This study provides an experimental example of de novo, bidirectional costly mutualism evolving from byproduct consumption. Themore »
- Authors:
- Publication Date:
- Research Org.:
- Harvard Univ., Cambridge, MA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC); National Institutes of Health (NIH)
- OSTI Identifier:
- 1478449
- Alternate Identifier(s):
- OSTI ID: 1610892
- Grant/Contract Number:
- SC0006731; 1R01-GM121498
- Resource Type:
- Published Article
- Journal Name:
- Proceedings of the National Academy of Sciences of the United States of America
- Additional Journal Information:
- Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Volume: 115 Journal Issue: 47; Journal ID: ISSN 0027-8424
- Publisher:
- National Academy of Sciences
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 59 BASIC BIOLOGICAL SCIENCES; science & technology - other topics; mutualism; cross-feeding; genome-scale metabolic modeling
Citation Formats
Harcombe, William R., Chacón, Jeremy M., Adamowicz, Elizabeth M., Chubiz, Lon M., and Marx, Christopher J. Evolution of bidirectional costly mutualism from byproduct consumption. United States: N. p., 2018.
Web. doi:10.1073/pnas.1810949115.
Harcombe, William R., Chacón, Jeremy M., Adamowicz, Elizabeth M., Chubiz, Lon M., & Marx, Christopher J. Evolution of bidirectional costly mutualism from byproduct consumption. United States. https://doi.org/10.1073/pnas.1810949115
Harcombe, William R., Chacón, Jeremy M., Adamowicz, Elizabeth M., Chubiz, Lon M., and Marx, Christopher J. Mon .
"Evolution of bidirectional costly mutualism from byproduct consumption". United States. https://doi.org/10.1073/pnas.1810949115.
@article{osti_1478449,
title = {Evolution of bidirectional costly mutualism from byproduct consumption},
author = {Harcombe, William R. and Chacón, Jeremy M. and Adamowicz, Elizabeth M. and Chubiz, Lon M. and Marx, Christopher J.},
abstractNote = {Mutualisms are essential for life, yet it is unclear how they arise. A two-stage process has been proposed for the evolution of mutualisms that involve exchanges of two costly resources. First, costly provisioning by one species may be selected for if that species gains a benefit from costless byproducts generated by a second species, and cooperators get disproportionate access to byproducts. Selection could then drive the second species to provide costly resources in return. Previously, a synthetic consortium evolved the first stage of this scenario: Salmonella enterica evolved costly production of methionine in exchange for costless carbon byproducts generated by an auxotrophic Escherichia coli. Growth on agar plates localized the benefits of cooperation around methionine-secreting S. enterica. Here, we report that further evolution of these partners on plates led to hypercooperative E. coli that secrete the sugar galactose. Sugar secretion arose repeatedly across replicate communities and is costly to E. coli producers, but enhances the growth of S. enterica. The tradeoff between individual costs and group benefits led to maintenance of both cooperative and efficient E. coli genotypes in this spatially structured environment. This study provides an experimental example of de novo, bidirectional costly mutualism evolving from byproduct consumption. The results validate the plausibility of costly cooperation emerging from initially costless exchange, a scenario widely used to explain the origin of the mutualistic species interactions that are central to life on Earth.},
doi = {10.1073/pnas.1810949115},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
number = 47,
volume = 115,
place = {United States},
year = {Mon Oct 22 00:00:00 EDT 2018},
month = {Mon Oct 22 00:00:00 EDT 2018}
}
https://doi.org/10.1073/pnas.1810949115
Web of Science
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