Simulation of legume-rhizobia symbiosis evolution under the multi-strain competition of bacteria for inoculation of symbiotic habitats | Zendy

N. I. Vorobyov | Zendy; Н. А. Проворов | Zendy

Open Access

Simulation of legume-rhizobia symbiosis evolution under the multi-strain competition of bacteria for inoculation of symbiotic habitats

Author(s) -

N. I. Vorobyov,

Н. А. Проворов

Publication year - 2008

Publication title -

ecological genetics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.148

H-Index - 3

eISSN - 2411-9202

pISSN - 1811-0932

DOI - 10.17816/ecogen643-11

Subject(s) - rhizobia , biology , symbiosis , mutualism (biology) , rhizosphere , competition (biology) , symbiotic bacteria , population , experimental evolution , strain (injury) , root nodule , bacteria , legume , inoculation , botany , nitrogen fixation , ecology , horticulture , genetics , gene , demography , anatomy , sociology

The model is suggested for evolution of N 2 -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 N 2 -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.

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