• Barneix, A. J. & Breteler, H. (1984) The role of cations in the uptake, transport and reduction of nitrate in wheat seedlings. FESPP, 4, 470471.
  • Barneix, A. J., Breteler, H. & Van De Geijn, S. C. (1984) Gas and ion exchanges in wheat roots after nitrogen supply. Physiologia Plantarum, 61, 357362.
  • Ben Zioni, A., Vaadia, Y. & Lips, S. H. (1971) Nitrate uptake by roots as regulated by nitrate reduction products of the shoot. Physiologia Plantarum, 24, 288290.
  • Blevins, D. G., Hiatt, A. J. & Lowe, R. H. (1974) The influence of nitrate and chloride uptake on expressed sap pH, organic acid synthesis, and potassium accumulation in higher plants. Plant Physiology, 54, 8287.
  • Blevins, D. G., Barnett, N. M., & Frost, W. B. (1978a) Role of potassium and malate in nitrate uptake and translocation by wheat seedlings. Plant Physiology, 62, 784788.
  • Blevins, D. G., Hiatt, A. J., Lowe, R. H. & Leggett, J. E. (1978b) Influence of K+ on the uptake, translocation and reduction of nitrate by barley seedlings. Agronomy Journal, 70, 393396.
  • Breteler, H. (1975) Carboxylates and the uptake of ammonium by excised maise roots. Agricultural Research Reports (Wageningen), 837, 199.
  • Breteler, H. & Hänisch ten Cate, C.H. H. (1978) Ionic balance of root-shoot nitrate transfer in dwarf bean. Physiologia Plantarum, 42, 5356.
  • Breteler, H., Hänisch ten Catek, C.H. H. & Nissen, P. (1979) Time course of nitrate uptake and nitrate reductase activity in nitrogen-depleted dwarf bean. Physiologia Plantarum, 45, 4955.
  • Cram, W. J. (1973) Internal factors regulating nitrate and chloride influx in plant cells. Journal of Experimental Botany, 24, 328341.
  • De Wit, C. T., Dijkshoorn, W. & Noggle, JC. (1963) Ionic balance and growth of plants. Agricultural Research Reports Wageningen, 69, 15, pp. 68.
  • Ferrari, T. E., Yoder, O. C. & Filner, P. (1973) Anaerobic nitrate production by plant cells and tissues: Evidence for two nitrate pools. Plant Physiology, 51, 423431.
  • Frost, W. B., Blevins, D. G, & Barnett, N. M. (1978) Cation pretreatment effects on nitrate uptake, xylem exudate and malate levels in wheat seedlings. Plant Physiology, 61, 323326.
  • Jeschke, W. D., Stelter, W., Reising, B. & Behl, R. (1983) Vacuolar Na/K exchange, its occurrence in root cells of Hordeum, Atriplex and Zea, and its significance for K/Na discrimination in roots. Journal of Experimental Botany, 34, 964979.
  • Johanson, J. G., Cheeseman, J. M. & Enkoji, C. (1983) Uptake and distribution of sodium and potassium by corn seedlings. II. Ion transport within the mesocotyl. Plant Physiology, 73, 159164.
  • Jungk, A. (1968) Die Alkalität der Pflanzenasche als Mass für den Kationenüberschuss in der Pflanze. Zeitsckrift für Pftanzenernährung und Bodenkunde, 120, 99105.
  • Kirkby, E. A. & Armstrong, M. J. (1980) Nitrate uptake by roots as regulated by nitrate assimilation in the shoot of caster oil plants. Plant Physiology, 65, 286290.
  • Kirkby, E. A., Armstrong, M. J. & Leggett, J- E. (1981) Potassium recirculation in tomato plants in relation to potassium supply. Journal of Plant Nutrition, 3, 955966.
  • Minotti, P. L., Williams, D. C. & Jackson, W. A. (1968) Nitrate uptake as affected by calcium and potassium. Soil Science Society of America Proceedings, 32, 692698.
  • Neyra, C. A. & Hageman, R. H. (1976) Relationships between carbon dioxide, malate, and nitrate accumulation and reduction in corn (Zea mays L.) seedlings. Plant Physiology, 58, 726730.
  • Nitsos, R. E. & Evans, H. J. (1966) Effect of univalent cations on the inductive formation of nitrate reductase. Plant Physiology, 41, 14991504.
  • Rufty, T. W., Jackson, W. A. & Raper, C. D. (1981) Nitrate reduction in roots as affected by the presence of potassium and by flux of nitrate through the roots. Plant Physiology, 68, 605609.
  • Smith, F. A. (1973) The internal control of nitrate uptake into excised barley roots with differing salt contents. The New Phytologist, 72, 769782.
  • Ulrich, A. (1941) Metabolism of non-volatile organic acids in excised barley roots as related to cation-anion balance during salt accumulation. American Journal of Botany, 28, 526537.