Explaining coexistence of nitrogen fixing and non-fixing rhizobia in legume-rhizobia mutualism using mathematical modeling

In the mutualism established between legumes and soil bacteria known as rhizobia, bacteria from soil infect plants roots and reproduce inside root nodules where they fix atmospheric N 2 for plant nutri- tion, receiving carbohydrates in exchange. Host-plant sanctions against non N 2 fixing, cheating...

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Autores principales: Moyano, Gabriel, Marco, Diana, Knopoff, Damián, Torres, Germán Ariel, Urner, Cristina Vilma
Formato: Artículo
Lenguaje:Inglés
Publicado: Elsevier 2021
Materias:
Mutualism
Cheating
Legume-rhizobia symbiosis
Host sanctions
Mathematical modeling
Agriculture
Acceso en línea:http://repositorio.unne.edu.ar/handle/123456789/30290
Aporte de:
RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) de Universidad Nacional del Nordeste
id I48-R184-123456789-30290
record_format dspace
institution Universidad Nacional del Nordeste
institution_str I-48
repository_str R-184
collection RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
language Inglés
topic Mutualism
Cheating
Legume-rhizobia symbiosis
Host sanctions
Mathematical modeling
Agriculture
spellingShingle Mutualism
Cheating
Legume-rhizobia symbiosis
Host sanctions
Mathematical modeling
Agriculture
Moyano, Gabriel
Marco, Diana
Knopoff, Damián
Torres, Germán Ariel
Urner, Cristina Vilma
Explaining coexistence of nitrogen fixing and non-fixing rhizobia in legume-rhizobia mutualism using mathematical modeling
topic_facet Mutualism
Cheating
Legume-rhizobia symbiosis
Host sanctions
Mathematical modeling
Agriculture
description In the mutualism established between legumes and soil bacteria known as rhizobia, bacteria from soil infect plants roots and reproduce inside root nodules where they fix atmospheric N 2 for plant nutri- tion, receiving carbohydrates in exchange. Host-plant sanctions against non N 2 fixing, cheating bacterial symbionts have been proposed to act in the legume- Rhizobium symbiosis, to preserve the mutualistic re- lationship. Sanctions include decreased rhizobial survival in nodules occupied by cheating rhizobia. Previ- ously, a simple population model experimentally based showed that the coexistence of fixing and cheat- ing rhizobia strains commonly found in field conditions is possible, and that the inclusion of sanctions leads to the extinction of cheating strains in soil. Here, we extend the previous model to include other factors that could complicate the sanction scenario, like horizontal transmission of symbiotic plasmids, turning non-nodulating strains into nodulating rhizobia, and competition between fixing and cheating strains for nodulation. In agreement with previous results, we show that plant populations persist even in the presence of cheating rhizobia without incorporating any sanction against the cheater populations in the model, under the realistic assumption that plants can at least get some amount of fixed N 2 from the effectively mutualistic rhizobia occupying some nodules. Inclusion of plant sanctions leads to the un- realistic extinction of cheater strains in soil. Our results agree with increasing experimental evidence and theoretical work showing that mutualisms can persist in presence of cheating partners.
format Artículo
author Moyano, Gabriel
Marco, Diana
Knopoff, Damián
Torres, Germán Ariel
Urner, Cristina Vilma
author_facet Moyano, Gabriel
Marco, Diana
Knopoff, Damián
Torres, Germán Ariel
Urner, Cristina Vilma
author_sort Moyano, Gabriel
title Explaining coexistence of nitrogen fixing and non-fixing rhizobia in legume-rhizobia mutualism using mathematical modeling
title_short Explaining coexistence of nitrogen fixing and non-fixing rhizobia in legume-rhizobia mutualism using mathematical modeling
title_full Explaining coexistence of nitrogen fixing and non-fixing rhizobia in legume-rhizobia mutualism using mathematical modeling
title_fullStr Explaining coexistence of nitrogen fixing and non-fixing rhizobia in legume-rhizobia mutualism using mathematical modeling
title_full_unstemmed Explaining coexistence of nitrogen fixing and non-fixing rhizobia in legume-rhizobia mutualism using mathematical modeling
title_sort explaining coexistence of nitrogen fixing and non-fixing rhizobia in legume-rhizobia mutualism using mathematical modeling
publisher Elsevier
publishDate 2021
url http://repositorio.unne.edu.ar/handle/123456789/30290
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