Abstract
Indigenous rhizobial population is among the factors which influence increased crop yield through inoculation with elite strains. In this study, we compared in greenhouse conditions the competitiveness of Rhizobium strain ISRA 355 for nodulation of the common bean (Phaseolus vulgaris) cultivated in different unsterile Senegal soils in terms of pH, N and C contents. The strain ISRA 355 produced a stable GUS+ transconjugant which was used for competition with indigenous soil rhizobia in six localities. At Bayakh, the transconjugant ISRA 355gusA was less competitive than the indigenous rhizobial strains, whereas in the other localities, it was more competitive since it occupied more than 90% of the nodules. Thus the Rhizobium strain ISRA 355 should be used for successfully inoculating the common bean in Senegal soils.
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Diouf, A., Spencer, M. & Gueye, M. Use of the gusA gene marker in a competition study of the Rhizobium strains nodulating the common bean (Phaseolus vulgaris) in Senegal soils. World Journal of Microbiology and Biotechnology 16, 337–340 (2000). https://doi.org/10.1023/A:1008996406752
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DOI: https://doi.org/10.1023/A:1008996406752