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Symbiotic gene exchange between Rhizobium trifolii strains in soil


, : Symbiotic gene exchange between Rhizobium trifolii strains in soil. Temperate pastures: their production, use and management: 208-210

Effective (nitrogen-fixing) inoculant strains of Rhizobium trifolii are commonly replaced in many soils by other effective strains not detected previously. This suggests that genetic exchange may occur with ecologically-adapted but less effective naturally-ocurring strains. Cloned DNA fragments were used as molecular probes to characterize a small population of field isolates of Rhizobium trifolii from white clover.

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Related references

Visona, L., 1964: Symbiotic interactions between some species of Trifolium and two strains of Rhizobium trifolii. The number of nodules and the effectiveness of symbiosis differed among various species of Trifolium inoculated with 2 strains of Rhizobium. The interaction, species of Trifolium X strain of Rhizobium trifolii, was significant for nodulation dry w...

Materon, L.A.; Hagedorn, C., 1983: Competitiveness and symbiotic effectiveness of five strains of Rhizobium trifolii on red clover. Five introduced strains of Rhizobium trifolii were examined on red clover at two locations in the southeastern USA (on a ultisol and a vertisol) over two consecutive growing seasons. Strains 162BB1, RP113-7, and LM1 were highly competitive and per...

Labandera, C.A.; Vincent, J.M., 1975: Loss of symbiotic capacity in commercially useful strains of Rhizobium trifolii. R. trifolii strains were isolated from Trifolium subterraneum and tested for nodulating capacity and effectiveness in N fixation. The strains were WU290, WA67 and CC2480a. The results emphasize the genetic instability and variability of cultures d...

Materon L.A.; Hagedorn C., 1983: Competitiveness and symbiotic effectiveness of 5 strains of rhizobium trifolii on red clover trifolium pratense. Little information is available on seasonal Rhizobium-red clover (Trifolium pratense L.) interactions, competitiveness and persistence, and dinitrogen fixation rates in livestock production areas of the southeastern USA. Five introduced strains of...

Lapinskas, E., 2003: Assessment of symbiotic efficiency of Rhizobium leguminosarum bv. trifolii and Sinorhizobium meliloti strains. In a long-term experiment (20 years) in Lithuania, the symbiotic efficiency between Rhizobium leguminosarum bv. trifolii and Sinorhizobium meliloti strains was investigated under field, pot and laboratory conditions. The soil of the experimental s...

Russell P.E.; Jones D.G., 1973: The effect of uv light on the symbiotic effectiveness and some physiological characteristics of 4 strains of rhizobium trifolii. Journal of Applied Bacteriology 36(4): 567-573

Mareckova H., 1975: Effect of mineral nitrogen and some rhizobium trifolii strains on nodulation and symbiotic fixation in red clover. Folia Microbiologica 20(1): 79

Cao, J.Q.; Chen, B.Y.; Yao, H.Q., 1988: Effectiveness of symbiotic nitrogen fixation by streptomycin tolerant mutant strains of Rhizobium trifolii. Plant culture, sand culture, pot and microplot experiments were conducted on the effects of inoculation with nine strains of streptomycin tolerant mutants of Rhizobium trifolii on nodulation and yield increase of Trifolium incarnatum L. Results sh...

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