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Updated: Nov 12, 2025

Divergence of Root Microbiota in Different Habitats based on Weighted Correlation Networks
Published on: September 25, 2021
Genetic relationships among rhizopine-producing Rhizobium strains
M Wexler1, D M Gordon2, P J Murphy1
1Department of Crop Protection, University of Adelaide, Glen Osmond, SA 5064, Australia.
Abstract:
Chromosomal and symbiosis-related genotypes of rhizopine-producing and non-producing isolates of Rhizobium meliloti and Rhizobium leguminosarum were examined by multilocus enzyme electrophoresis and RFLP. The distribution of rhizopine production in both species was found to be independent of host genotype. Conversely, rhizopine production was associated with particular symbiotic plasmid types. This association may explain the observed distribution of rhizopine production in R. leguminosarum and R. meliloti. Rhizopine synthesis (mos) genes showed greater sequence divergence than rhizopine catabolism (moc) genes in both R. meliloti and R. leguminosarum. Furthermore, mos and moc genes were less divergent in R. leguminosarum than R. meliloti, suggesting a more recent evolution in the former species.
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