Plant and Soil

, Volume 360, Issue 1–2, pp 187–196 | Cite as

Aluminium speciation and phytotoxicity in alkaline soils

  • D. J. Brautigan
  • P. Rengasamy
  • D. J. Chittleborough
Regular Article



Highly alkaline soils (pH > 9.0) may adversely affect agricultural crop productivity. Problems encountered include poor structure and nutrient deficiency. Research based on solution cultures suggests that aluminium (Al) phytotoxicity may occur in soils with pH > 9.0, but little research has been undertaken on actual soils under controlled conditions. The nature of the Al species responsible and the pH regime of the soils when this occurs are unknown.


The charge and species of Al responsible for this toxicity was investigated using Zeta Potential measurement, Nuclear Magnetic Resonance (NMR) spectroscopy, Al precipitation characteristics and electrical conductivity as a function of pH. An anion exchange resin was used to evaluate Al availability to plants at alkaline pH. To verify Al phytotoxicity, a pot experiment was performed with plants grown at near neutral and high pH, with and without Al.


The anionic aluminate species of aluminium was ubiquitous at highly alkaline pH, and was the dominant charged species at pH 9.2. Aluminium was phytotoxic at high pH, significantly reducing the stem and root development of field pea test plants over and above that caused by alkalinity alone. The effects of both alkalinity in general and aluminium in particular became noticeable at pH 9.0 and debilitating at pH > 9.2.


As this corresponds to the pH where aluminate becomes dominant, it is probably responsible for the phytotoxicity.


Aluminium Phytotoxicity Alkaline soils 


  1. Bertrand I, Janik LJ, Holloway RE, Armstrong RD, McLaughlin MJ (2002) The rapid assessment of concentrations and solid phase associations of macro- and micronutrients in alkaline soils by mid-infrared diffuse reflectance spectroscopy. Aust J Soil Res 40(8):1339–1356CrossRefGoogle Scholar
  2. Cooper DS (2004) Genetics and agronomy of tranient salinity in Triticum durum and T. aestivum., school of agriculture and wine. The University of Adelaide, AdelaideGoogle Scholar
  3. Delhaize E, Ryan PR (1995) Aluminium toxicity and tolerance in plants. Plant Physiol 107:315–321PubMedGoogle Scholar
  4. Guerinot ML (2007) It’s elementary: enhancing Fe3+ reduction improves rice yield. Proc Natl Acad Sci 104(18):7311–7312PubMedCrossRefGoogle Scholar
  5. Central Soil Salinity Research Institute (2007) Annual Report. Karnal, IndiaGoogle Scholar
  6. Isbell RF (1996) The Australian Soil Classification. CSIRO Publishing Collingwood, VictoriaGoogle Scholar
  7. Kinraide TB (1990) Assessing the rhizotoxicity of the aluminate ion, Al(OH)4−. Plant Physiol 93:1620–1625PubMedCrossRefGoogle Scholar
  8. Kochian LV (1995) Cellular mechanisms of aluminium toxicity and resistance in plants. Annu Rev Plant Physiol Plant Mol Biol 46:237–260CrossRefGoogle Scholar
  9. Kopittke PM, Menzies NW, Blamey FPC (2004) Rhizotoxicity of aluminate and polycationic aluminium at high pH. Plant Soil 266:177–186CrossRefGoogle Scholar
  10. Ma G, Rengasamy P, Rathgen AJ (2003) Phytotoxicity of aluminium to wheat plants in high-pH solutions. Aust J Exp Agric 43:497–501CrossRefGoogle Scholar
  11. Marion GM, Hendricks DM, Dutt GR, Fuller WH (1976) Aluminium and silica solubility in soils. Soil Sci 127:76–85CrossRefGoogle Scholar
  12. Northcote KH, Skene JKM (1972) Australian soils with saline and sodic properties. CSIRO Soil Publication, 27Google Scholar
  13. Sarpola A (2007) The hydrolysis of aluminium, a mass spectrometric study. Faculty of technology, Department of process and environmental engineering, water resources and environmental engineering laboratory. University of Oulu, OuluGoogle Scholar
  14. Sipos P, Hefter G, May P (2006) Al NMR and Raman spectroscopic studies of alkaline aluminate solutions with extremely high caustic content—Does the octahedral species Al(OH)63− exist in solution?, 1st workshop of the European Union: Analysis and removal of contaminants from wastewaters for the implementation of the Water Framework Directive—1st EMCO 2005. TalantaGoogle Scholar
  15. Sposito G (1989) Soil particle surfaces. The chemistry of soils. Oxford university press, OxfordGoogle Scholar
  16. Stass A, Wang Y, Eticha D, Horst WJ (2006) Aluminium rhizotoxicity in maize grown in solutions with Al3+ or Al(OH)4 as predominant solution Al species. J Exp Bot 57:4033–4042PubMedCrossRefGoogle Scholar
  17. Tyler G (1994) Plant uptake of aluminium from calcareous soils. Experientia 50:701–703CrossRefGoogle Scholar
  18. vanRaij B, Cantarella H, Quaggio JA, Prochnow LI (2009) Ion exchange resin for assessing phosphorus availability in soils. Better Crops 93(1):23–25Google Scholar
  19. Wilhelm N, Hollaway K (1998) Persistence of sulfonylurea herbicides on alkaline soils. 9th Australian Agronomy Conference. Wagga WaggaGoogle Scholar

Copyright information

© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  • D. J. Brautigan
    • 1
  • P. Rengasamy
    • 2
  • D. J. Chittleborough
    • 3
  1. 1.Soil and Land Systems, School of Earth and Environmental SciencesThe University of AdelaideUrrbraeAustralia
  2. 2.Soil Group, School of Agriculture Food and WineThe University of AdelaideUrrbraeAustralia
  3. 3.School of Earth and Environmental SciencesThe University of AdelaideAdelaideAustralia

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