Plant and Soil

, Volume 155, Issue 1, pp 273–276 | Cite as

Mineral uptake and transport in xylem and phloem of the proteaceous tree, Banksia prionotes

  • John S. Pate
  • W. Dieter Jeschke


Xylem sap of sinker (tap) root, cluster feeding roots, lateral roots and from an age series of main stem extensions of 6-year trees of Banksia prionotes was collected and analyzed for principal organic and inorganic solutes. During the phase of root uptake activity in winter and spring, cluster roots were principal xylem donors of malate, phosphate, chloride, sodium, potassium and amino acid N whereas other parts of the root served as major sources to the shoot of other cations, nitrate and sulphate. Sinker root xylem sap was at all times less concentrated in solutes than that of lateral roots into which cluster roots were voiding exported solutes. Phosphate was abstracted from xylem by stem tissue during winter and it and a range of other solutes released back to xylem immediately prior to extension growth of the shoot in summer. Phloem sap collected from mid regions of stems was unusually low in potassium and phosphate relative to chloride and sulphate in comparison with phloem sap of other species, and its low potassium: sodium ratio relative to xylem indicated poor discrimination against sodium during phloem loading. Data are discussed in relation to the asynchronous seasonal cycles of nutrient uptake and shoot growth.

Key words

Banksia mineral transport phloem seasonal partitioning xylem 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Bowen B J, and Pate J S 1991. Adaptations of S W Australian members of the Proteaceae; allocation of resources during early growth. Proc. International Protea Association Sixth Biennial Conference, Perth, Western Australia. Promaco Conventions Pty Ltd. pp. 289–301.Google Scholar
  2. Bowen B J 1991. Fire response within the family Proteaceae: a comparison of plants displaying the seeder and resprouter mode of recovery. PhD Thesis.Google Scholar
  3. Jeschke W D and Pate J S 1991. J. Exp. Bot. 42, 1105–1116.Google Scholar
  4. Jeschke W D and Pate J S 1992. J. Exp. Bot. 43, 393–402.Google Scholar
  5. Jeschke W D and Wolf O 1988. J. Plant Physiol. 137, 45–53.Google Scholar
  6. Lamont B B and Bergl S M 1991. OIKOS 60, 291–298.Google Scholar
  7. Pate J S 1986. In Phloem Transport. Eds. J Cronshaw, W Lucas and R T Ciaquinta. pp. 445–462. A R Liss, Inc., New York.Google Scholar
  8. Pate J S, Dixon K W and Orshan G 1984 In Kwongan-Plant Life of the Sandplain. Eds. J S Pate and J S Beard. pp. 84–100. University of Western Australia Press, Nedlands.Google Scholar
  9. Pate J S 1975. In Encyclopedia of Plant Physiology. Eds. M H Zimmerman and J A Milburn. pp. 451–473. Springer-Verlag, Berlin.Google Scholar

Copyright information

© Kluwer Academic Publishers 1993

Authors and Affiliations

  • John S. Pate
    • 1
  • W. Dieter Jeschke
    • 1
  1. 1.Botany DepartmentUniversity of Western AustraliaNedlands

Personalised recommendations