1887

Abstract

When cells or the culture filtrate of grown on a medium without a source of fixed nitrogen were added to barley seeds, they sometimes stimulated the extension of seedling roots. The stimulation appeared to be due to a bacterial metabolite as the cells used were non-viable (due to a decrease in pH of the growth medium). There was no evidence that 3-indoleacetic acid or gibberellic acid, which were produced by the bacterium, were involved in the stimulation. When the bacterium was grown on a medium containing nitrate, the cells, but not the culture filtrate, always inhibited germination and the extension of seedling roots. This inhibition of germination appears to be due to competition between viable bacteria and seed for available oxygen.

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/content/journal/micro/10.1099/00221287-112-1-45
1979-05-01
2021-05-17
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References

  1. Barber D. A., Lynch J. M. 1977; Microbial growth in the rhizosphere. Soil Biology and Biochemistry 9:305–308
    [Google Scholar]
  2. Brakel J., Hilger F. 1965; Étude qualitative et quantitative de la synthése de substances de nature auxinique par Azotobacter chroococcum in vitro. Bulletin de l'Institut agronomique et des stations de recherches de Gembloux 33:469–487
    [Google Scholar]
  3. Brown M. E. 1974; Seed and root bacterisation. Annual Review of Phytopathology 12:181–197
    [Google Scholar]
  4. Brown M. E., Burlingham S. K., Jackson R. M. 1962; Studies on Azotobacter species in soil II. Populations of Azotobacter in rhizosphere and effects of artificial inoculation. Plant and Soil 17:320–332
    [Google Scholar]
  5. Carver M. F. F., Gloyne A. R. 1971; The effects of variations in ambient temperature on the Gilson differential respirometer. Laboratory Practice 20:423
    [Google Scholar]
  6. Cooper R. 1959; Bacterial fertilizers in the Soviet Union. Soils and Fertilizers 22:327–333
    [Google Scholar]
  7. Dalton H., Postgate J. R. 1969; Effect of oxygen on growth of Azotobacter chroococcum in batch and continuous culture. Journal of General Microbiology 54:463–473
    [Google Scholar]
  8. Lynch J. M. 1977; Phytotoxicity of acetic acid produced in the anaerobic decomposition of wheat straw. Journal of Applied Bacteriology 42:81–87
    [Google Scholar]
  9. Lynch J. M. 1979; Plant growth regulators. In Handbook of Microbiology VII, 2nd edn. (in the Press). Edited by Laskin A. I., Lechevalier H. A. Cleveland, Ohio: C.R.C. Press;
    [Google Scholar]
  10. Lynch J. M., Pryn S. J. 1977; Interaction between a soil fungus and barley seed. Journal of General Microbiology 103:193–196
    [Google Scholar]
  11. Lynch J. M., White N. 1977; Effects of some non-pathogenic micro-organisms on the growth of gnotobiotic barley plants. Plant and Soil 47:161–170
    [Google Scholar]
  12. Macleod A. M. 1969; The utilisation of cereal seed reserves. Science Progress 57:99–112
    [Google Scholar]
  13. Mishustin E. N. 1970; The importance of non-symbiotic micro-organisms in agriculture. Plant and Soil 32:545–554
    [Google Scholar]
  14. Mishustin E. H., Shilnikova U. K. 1969 Free-living nitrogen-fixing bacteria of the genus Azotobacter. In Soil Biology pp. 72–109 Paris: U.N.E.S.C.O.;
    [Google Scholar]
  15. Patel J. J. 1969; Micro-organisms in the rhizo-sphere of plants inoculated with Azotobacter chroococcum. Plant and Soil 31:209–223
    [Google Scholar]
  16. Postgate J. R. 1974; New advances and future potential in biological nitrogen fixation. Journal of Applied Bacteriology 37:185–202
    [Google Scholar]
  17. Rovira A. D. 1965; Effects of Azotobacter, Bacillus and Clostridium on the growth of wheat. In Plant Microbes Relationships pp. 193–200 Edited by Macura J., Vancura V. Prague: Czechoslovak Academy of Sciences;
    [Google Scholar]
  18. Rubenchik L. I. 1963 Azotobacter and its use in agriculture. Jerusalem: Israeli Program for Scientific Translations;
    [Google Scholar]
  19. Siegel O., Schmidt H. L. 1966; Laborversuche und Feldversuchsergebnisse mit Azotobacter Impfung. Landwirtschaftliche Forschung 19:18–28
    [Google Scholar]
  20. Smith K. A., Dowdell R. J. 1973; Gas chromatographic analysis of the soil atmosphere: automatic analysis of gas samples for O2, N2, Ar, CO2, N2O and C1-C4 hydrocarbons. Journal of Chromatographic Science 11:655–658
    [Google Scholar]
  21. Vancura V. 1961; Detection of gibberellic acid in Azotobacter cultures. Nature, London 192:88–89
    [Google Scholar]
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