Simulation of legume-rhizobia symbiosis evolution under the multi-strain competition of bacteria for inoculation of symbiotic habitats
- Authors: Vorobyov N.I1, Provorov N.A1
-
Affiliations:
- All-Russia Research Institute for Agricultural Microbiology, Saint-Petersburg, RF
- Issue: Vol 6, No 4 (2008)
- Pages: 3-11
- Section: Articles
- URL: https://journals.eco-vector.com/ecolgenet/article/view/5418
- DOI: https://doi.org/10.17816/ecogen643-11
- ID: 5418
Cite item
Full Text
Abstract
The model is suggested for evolution of N2-fixing legume-rhizobia symbiosis implemented under the conditions of multi-strain bacteria competition for inoculation of symbiotic habitats (rhizosphere, nodules). Competitiveness of each strain is characterized by the power coefficients which reflect the operation of frequency-dependent selection in the rhizobia population. When polymorphic bacteria populations are interacting with the dimorphic plant population, the selective pressures in favor of hostspecific symbionts (forming N2-fixing nodules only with one of the available plant genotypes) are higher than the pressures in favor of non-host-specific symbionts (forming these nodules with both plant genotypes). The highest mutualism efficiency is reached under an intermediate level of plant population diversity.
About the authors
Nikolay I Vorobyov
All-Russia Research Institute for Agricultural Microbiology, Saint-Petersburg, RF
Email: nik4@newmail.ru
Nikolay A Provorov
All-Russia Research Institute for Agricultural Microbiology, Saint-Petersburg, RF
Email: provorov@newmail.ru
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