SIMULATION OF PLANT-BACTERIA CO-EVOLUTION IN THE MUTUALLY BENEFICIAL SYMBIOSIS



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Abstract

The mathematical model for evolution of legume-rhizobia mutualism based on the partners' positive feedbacks resulted from their metabolic (C-N) exchange is presented. Negative FDS in rhizobia population, combined with the partners' positive feedbacks ensure anchoring or even domination of the mutants which either acquired the mutualistic traits or changed the specificity in their expression with different host genotypes. The created model allows us to consider the mutualistic symbiosis as of a finely balanced population system in which the equilibrium may be shifted in favor of beneficial microbial genotypes due to natural selection for an improved symbiotic efficiency implemented in plant population. Research is supported by RFBR grant 06-04-48800a.

About the authors

Nikolay A Provorov

All-Russia Research Institute for Agricultural Microbiology, Saint-Petersburg, RF

Email: provorov@newmail.ru

Nikolay I Vorobyov

All-Russia Research Institute for Agricultural Microbiology, Saint-Petersburg, RF

Email: nik4@newmail.ru

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