1887

Abstract

Glutamate synthase (GOGAT) activities of the symbiotic cyanobacteria of the lichens Peltigera canina and Peltigera aphthosa and of the water fern Azolla caroliniana have been determined and, like glutamine synthetase (GS) activity, found to be substantially reduced compared with the activities found in the free-living cyanobacteria. A similar reduction in GOGAT activity was not noted in the symbiotic green alga (Coccomyxa sp.) in P. aphthosa. The selective reduction of GS-GOGAT activity in symbiosis may be related to the production of extracellular nitrogen by the symbiotic cyanobacterium.

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/content/journal/micro/10.1099/00221287-126-2-515
1981-10-01
2021-07-24
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References

  1. Givan C. V., Givan A. L., Leech R. M. 1970; Photoreduction of α-ketoglutarate to glutamate by Vicia faba chloroplasts. Plant Physiology 45:624–630
    [Google Scholar]
  2. Kessler E., Arthur W., Brugger J. E. 1957; The influence of manganese and phosphate on delayed light emission, fluorescence, photoreduction and photosynthesis in algae. Archives of Biochemistry and Biophysics 71:326–335
    [Google Scholar]
  3. Newton J. W., Herman A. I. 1979; Isolation of cyanobacteria from the aquatic fern, Azolla. Archives of Microbiology 120:161–165
    [Google Scholar]
  4. Peters G. A. 1976; Studies on the Azolla- Anabaena azollae symbiosis. In Proceedings of the International Symposium on Nitrogen Fixation. 2 pp. 592–610 Newton W. E., Nyman C. J. Edited by Pullman: Washington State University Press;
    [Google Scholar]
  5. Peters G. A., Mayne B. C. 1974; The Azolla- Anabaena azollae relationship. I. Initial characterization of the associtation. Plant Physiology 53813–819
    [Google Scholar]
  6. Peters G. A., Mayne B. C., Ray T. B., Toia R. E. Jr 1979; Physiology and biochemistry of the Azolla-Anabaena symbiosis. In Nitrogen and Rice pp. 325–344 Los Banos, Philippines: International Rice Research Institute;
    [Google Scholar]
  7. Rai A. N., Rowell P., Stewart W. D. P. 1980; NH4+ assimilation and nitrogenase regulation in the lichen Peltigera aphthosa Willd. New Phytologist 85:545–555
    [Google Scholar]
  8. Rai A. N., Rowell P., Stewart W. D. P. 1981; 15N2 incorporation and metabolism in the lichen Peltigera aphthosa Willd. Planta in the Press
    [Google Scholar]
  9. Ray T. B., Peters G. A., Toia R. E. Jr Mayne B. C. 1978; The Azolla-Anabaena azollae relationship. VII. Distribution of ammonia assimilating enzymes, protein and chlorophyll between host and symbiont. Plant Physiology 62:463–467
    [Google Scholar]
  10. Richardson D. H. S., Hill D. J., Smith D. C. 1968; The role of the alga in determining the pattern of carbohydrate movement between lichen symbionts. New Phytologist 67:469–486
    [Google Scholar]
  11. Rodgers G. A., Stewart W. D. P. 1977; The cyanophyte-hepatic symbiosis. I. Morphology and physiology. New Phytologist 78:441–458
    [Google Scholar]
  12. Sampaio M.J.A.M., Rai A. N., Rowell P., Stewart W. D. P. 1979; Occurrence, synthesis and activity of glutamine synthetase in N2-fixing lichens. FEMS Microbiology Letters 6:107–110
    [Google Scholar]
  13. Shanmugam K. T., O’Gara F., Andersen K., Valentine R. C. 1978; Biological nitrogen fixation. Annual Review of Plant Physiology 29:263–276
    [Google Scholar]
  14. Stanier R. Y., Kunisawa R., Mandel M., Cohen-Bazire G. 1971; Purification and proper ties of unicellular blue-green algae (order Chroococcales). Bacteriological Reviews 35:171–205
    [Google Scholar]
  15. Stewart W. D. P. 1980; Some aspects of structure and function in N2-fixing cyanobacteria. Annual Review of Microbiology 34:497–536
    [Google Scholar]
  16. Stewart W. D. P., Rodgers G. A. 1977; The cyanophyte-hepatic symbiosis. II. Nitrogen fixation and interchange of nitrogen and carbon. New Phytologist 78:459–471
    [Google Scholar]
  17. Stewart W. D. P., Rowell P. 1977; Modifications of nitrogen fixing algae in lichen symbioses. Nature; London: 265371–372
    [Google Scholar]
  18. Stewart W. D. P., Fitzgerald G. P., Burris R. H. 1967; In situ studies on N2-fixation using the acetylene reduction technique. Proceedings of the National Academy of Sciences of the United States of America 58:2071–2078
    [Google Scholar]
  19. Stewart W. D. P., Haystead A., Dharma-Wardene M. W. N. 1975; Nitrogen assimilation and metabolism in blue-green algae. In Nitrogen Fixation by Free-living Microorganisms pp. 129–158 Stewart W. D. P. Edited by Cambridge: Cambridge University Press;
    [Google Scholar]
  20. Stewart W. D. P., Rowell P., Rai A. N. 1980; Symbiotic nitrogen-fixing cyanobacteria. In Nitrogen Fixation pp. 239–277 Stewart W. D. P., Gallon J. R. Edited by London & New York: Academic Press.;
    [Google Scholar]
  21. Thomas J., Meeks J. C., Wolk C. P., Shaffer P. W., Austin S. M., Chien W. S. 1977; Formation of glutamine from BN ammonia, 13N dinitrogen and 14C glutamate by heterocysts isolated from Anabaena cylindrica. Journal of Bacteriology 129:1545–1555
    [Google Scholar]
  22. Wolk C. P., Thomas J., Shaffer P. W., Austin S. M., Galonsky A. 1976; Pathways of nitrogen metabolism after fixation of 13N-labelled nitrogen gas by the cyanobacterium, Anabaena cylindrica. Journal of Biological Chemistry 251:5027–5034
    [Google Scholar]
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