Plant and Soil

, Volume 144, Issue 2, pp 259–265

Organic acids in the rhizosphere of Banksia integrifolia L.f.

  • P. F. Grierson

DOI: 10.1007/BF00012883

Cite this article as:
Grierson, P.F. Plant Soil (1992) 144: 259. doi:10.1007/BF00012883


Water leachates of the proteoid root layer of a mature stand of Banksia integrifolia were analysed for low molecular weight (LMW) organic acids by GC, HPLC and colorimetric techniques. Large amounts of organic acids (2500 μ g in 100 mL of leachate) were found in the proteoid root layer compared to the surrounding soil and leaf litter (∼230 μg in 100 mL of leachate). Citric acid represented approximately 50% of the total organic acids leached, malic acid approximately 18%, and aconitic acid constituted approximately 17%. Concentration of citric acid in the proteoid root layer may enhance the availability of phosphorus for plant uptake.

Key words

citric acid GC HPLC proteoid roots rhizosphere root exudates 

Copyright information

© Kluwer Academic Publishers 1992

Authors and Affiliations

  • P. F. Grierson
    • 1
  1. 1.School of BotanyUniversity of MelbourneParkvilleAustralia

Personalised recommendations