Organic acids in the rhizosphere of Banksia integrifolia L.f

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 colorimetrie techniques. Large amounts of organic acids (2500 ì g in 100 mL of leachate) were found in the proteoid root layer compared to t...

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Bibliographic Details
Published in:Plant and soil 1992-08, Vol.144 (2), p.259-265
Main Author: GRIERSON, P.F.
Format: Article
Language:English
Subjects:
Acid soils
Animal and plant ecology
Animal, plant and microbial ecology
Autoecology
Biological and medical sciences
Forest soils
Fundamental and applied biological sciences. Psychology
Organic acids
Organic soils
Plant litter
Plant roots
Plants
Plants and fungi
Rhizosphere
Soil biochemistry
Soil samples
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Summary: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 colorimetrie techniques. Large amounts of organic acids (2500 ì 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.
ISSN:0032-079X
1573-5036
DOI:10.1007/bf00012883