Conclusion
The intensive study of the symbiosis ofRhizobium and its legume host-plant has emphasised how delicate is the equilibrium upon which a satisfactory association depends. The effectiveness of the bacterial strain for a particular host plant, the genetic stability of this strain and its ability to compete with other strains in the soil may all influence the growth of the crop. The plant begins to exert its influence on the bacteria by root secretions before they infect the roots and both the degree of infection and the activity of the nodules that are formed, will be influenced by genes in the plant as well as by environmental conditions that affect its physiology. It is the separation of these complex factors, that is at once the main difficulty and the chief fascination in the study of this symbiosis.
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Thornton, H.G. The biological interactions ofRhizobium to its host legume. Antonie van Leeuwenhoek 12, 85–96 (1947). https://doi.org/10.1007/BF02272655
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DOI: https://doi.org/10.1007/BF02272655