Integration of Nitrate and Ammonium Assimilation in Higher Plants

  • R. Novoa
  • R. S. Loomis
  • D. K. McDermitt


Because of its role in proteins and nucleic acids, nitrogen can be viewed as the central element around which carbon metabolism is organized in living material. Nitrogen accumulates to high levels in soils and vegetation of natural systems but it is strongly limiting to the productivity of most agricultural systems. One reason is that more nitrogen is removed in exploitation than returns from sources such as rainfall, dust, seed and fixation by free-living or symbiotic bacteria. Another is that the annual plants as employed in agriculture are capable of placing greater demands on nutrient cycling than occur in natural systems. The result is that nitrogen economy is a critical issue in crop management and thus also in agricultural research.


Nitrate Reductase Glutamine Synthetase Nitrate Reduction Glutamic Dehydrogenase Nitrate Uptake 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Aslam, M., Oaks, A., and Huffaker, R. C., 1976, Effect of light and glucose on the induction of nitrate reductase in corn roots, Plant Physiol., 58:588.PubMedCrossRefGoogle Scholar
  2. Cram, W. J., 1973, Internal factors regulating nitrate and chloride influx in plant cells, J. Exp. Bot., 24:328.CrossRefGoogle Scholar
  3. Ezeta, F. H., and Jackson, W. A., 1975, Nitrate translocation by detopped corn seedlings, Plant Physiol., 56:148.PubMedCrossRefGoogle Scholar
  4. Hunt, W. F., and Loomis, R. S., 1979, Respiration modelling and hypothesis testing with a dynamic model of sugar beet growth, Ann. Bot., 44:5.Google Scholar
  5. Jones, R. W., and Sheard, R. W., 1975, Accumulation and stability of nitrite in intact aerial leaves, Plant Sci. Lett., 11:285.Google Scholar
  6. Lancaster, D. L., 1977, Ecological significance of nitrate uptake and reduction by annual grass species, Ph.D. Thesis, University of California, Davis, CA.Google Scholar
  7. Loomis, R. S., Rabbinge, R., and Ng, E., 1979, Explanatory models in crop physiology, Ann. Rev. Plant Physiol., 30:339.CrossRefGoogle Scholar
  8. Mitchell, C. A., and Stocking, C. R., 1975, Kinetics and energetics of light driven chloroplast glutamine synthesis, Plant Physiol., 55:59.PubMedCrossRefGoogle Scholar
  9. Novoa, R. A., 1979, A preliminary dynamic model of nitrogen metabolism in higher plants, Ph.D. Thesis, University of California, Davis, CA.Google Scholar
  10. Pate, J. S., 1980, Transport and partitioning of nitrogenous solutes, Ann. Rev. Plant Physiol., 31:313.CrossRefGoogle Scholar
  11. Pate, J. S., and Layzell, D. B., 1981, Carbon and nitrogen partitioning in the whole plant — a thesis based on empirical modelling, in: “Aspects of Nitrogen Metabolism,” D. Bewley, ed., Spruijt, The Netherlands, in press.Google Scholar
  12. Penning de Vries, F. W. T., Brunsting, A. H. M., and van Laar, H. H., 1974, Products, requirements and efficiency of biosynthesis: a quantitative approach, J. Theor. Biol., 45:339.CrossRefGoogle Scholar
  13. Radin, J. R., 1978, A physiological basis for the division of nitrate assimilation between roots and leaves, Plant Sci. Lett., 13:21.CrossRefGoogle Scholar
  14. Rao, K. P., and Rains, D. W., 1976, Nitrate absorption by barley. I. Kinetics and energetics, Plant Physiol., 57:55.PubMedCrossRefGoogle Scholar
  15. Segal, I. H., 1975, “Enzyme Kinetics,” John Wiley, New York.Google Scholar
  16. Stewart, G. R., and Rhodes, D., 1977, Control of enzyme levels in the regulation of nitrogen assimilation, in: “Regulation of Enzyme Synthesis and Activity in Higher Plants,” H. Smith, ed., Academic Press, London.Google Scholar
  17. van den Honert, T. H., and Hooymans, J. J. M., 1955, On the absorption of nitrate by maize in water culture, Acta Bot. Neerl., 4:376.Google Scholar
  18. van den Honert, T. H., and Hooymans, J. J. M., 1961, Observations on the absorption of ammonium by cut discs of potato tuber as compared to maize roots, Acta Bot. Neerl., 10:261.Google Scholar
  19. van Keulen, H., 1977, Nitrogen requirements of rice with special reference to Java, Contr. Centr. Res. Inst. Agric. Bogor. (Indonesia), No. 30.Google Scholar

Copyright information

© Plenum Press, New York 1981

Authors and Affiliations

  • R. Novoa
    • 1
  • R. S. Loomis
    • 1
  • D. K. McDermitt
    • 1
  1. 1.Department of Agronomy and Range ScienceUniversity of CaliforniaDavisUSA

Personalised recommendations