Transport in the Phloem

  • C. Marshall
  • G. R. Sagar


A multicellular plant with specialised organs can only function effectively if it has an organised transport system. The over-all nutrition and growth of a plant may depend as much on the efficient transfer of nutrients between its component parts as it does on their total synthesis or uptake. Long-distance transport of nutrients in higher plants has been studied for over 250 years, and although there is now one generally accepted theory of water movement in the xylem, there is still much uncertainty and confusion about the movement of organic substances in the phloem.


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Further Reading


  1. F. L. Milthorpe and J. Moorby, ‘Vascular Transport and its Significance in Plant Growth’, A. Rev. Pl. Physiol., 20 (1969) pp. 117–38.CrossRefGoogle Scholar
  2. J. A. Richardson, Translocation in Plants, 2nd ed., Studies in Biology No. 10 (Edward Arnold, London, 1968).Google Scholar
  3. I. F. Wardlaw, ‘The Control and Pattern of Movement of Carbohydrates in Plants’, Bot. Rev., 34 (1968) pp. 79–105.CrossRefGoogle Scholar
  4. F. B. P. Wooding, Phloem, Oxford Biology Reader No. 15 (Oxford University Press, 1971).Google Scholar
  5. M. H. Zimmermann, ‘Translocation of Nutrients’, in Physiology of Plant Growth and Development, ed. M. B. Wilkins (McGraw-Hill, Maidenhead, 1969) pp. 381–417.Google Scholar

Advanced Reading

  1. M. J. Canny, Phloem Translocation (Cambridge University Press, 1973).Google Scholar
  2. A. S. Crafts and C. E. Crisp, Phloem Transport in Plants (W. H. Freeman, San Francisco, 1971).Google Scholar
  3. K. Esau, ‘The Phloem’, Handbuch der Pflanzenanatomie, Bd 5, T2 (Borntraeger, Berlin, 1969).Google Scholar
  4. W. Eschrich, ‘Biochemistry and Fine Structure of Phloem in Relation to Transport’, A. Rev. Pl. Physiol., 21 (1970) pp. 193–214.CrossRefGoogle Scholar
  5. E. A. C. MacRobbie, ‘Phloem Translocation, Facts and Mechanisms: a Comparative Survey’, Biol. Rev., 46 (1971) pp. 429–81.CrossRefGoogle Scholar
  6. A. J. Peel, Transport of Nutrients in Plants (Butterworths, London, 1974).Google Scholar
  7. D. Smith, L. Muscatine and D. Lewis, ‘Carbohydrate Movement from Autotrophs to Heterotrophs in Parasitic and Mutualistic Symbiosis’, Biol. Rev., 44 (1969) pp. 17–90.PubMedCrossRefGoogle Scholar
  8. P. E. Weatherley and R. P. C. Johnson, ‘The Form and Function of the Sieve Tube: a Problem in Reconciliation’, Int. Rev. Cytol., 24 (1968) pp. 149–92.PubMedCrossRefGoogle Scholar
  9. M. H. Zimmermann, ‘Transport in the Phloem’, in Trees: Structure and Function ed. M. H. Zimmermann and C. L. Brown (Springer-Verlag, New York, 1971) pp. 221–79.CrossRefGoogle Scholar

Selected Papers

  1. D. S. Fensom, ‘A Theory of Translocation in Phloem of Heracleum by Contractile Protein Microfibrillar Material’, Can. J. Bot., 50 (1972) pp. 479–97.CrossRefGoogle Scholar
  2. D. R. Geiger and D. A. Cataldo, ‘Leaf Structure and Translocation in Sugar Beet’, Pl. Physiol., Lancaster, 44 (1969) pp. 45–54.CrossRefGoogle Scholar
  3. D. C. Spanner, ‘The Translocation of Sugar in Sieve Tubes’, J. exp. Bot., 9 (1958) pp. 332–42.CrossRefGoogle Scholar
  4. R. Thaine, ‘A Translocation Hypothesis Based on the Structure of Plant Cytoplasm’, J. exp. Bot., 13 (1962) pp. 152–60.CrossRefGoogle Scholar
  5. R. Thaine, S. L. Ovenden and J. S. Turner, ‘Translocation of Labelled Assimilates in the Soybean’, Aust. J. biol. Sci., 12 (1959) pp. 349–71.Google Scholar
  6. P. Trip and P. R. Gorham, ‘Bidirectional Translocation of Sugars in Sieve Tubes of Squash Plants’, Pl Physiol., Lancaster, 43 (1968) pp. 877–82.CrossRefGoogle Scholar

Copyright information

© Macmillan Publishers Limited 1976

Authors and Affiliations

  • C. Marshall
  • G. R. Sagar

There are no affiliations available

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