Plant and Soil

, Volume 68, Issue 1, pp 19–32 | Cite as

The acquisition of phosphorus byLupinus albus L.

I. Some characteristics of the soil/root interface
  • W. K. Gardner
  • D. G. Parbery
  • D. A. Barber
Article

Summary

It has been demonstrated by an agar film technique thatL. albus can cause the breakdown of colloids of iron/silicate, iron/phosphate, aluminium/silicate and aluminium phosphate and destabilise suspensions of manganese dioxide, calcium mono-hydrogen phosphate and ferric hydroxide. Dissolution of these compounds was most marked in areas adjacent to proteoid roots (dense clusters of secondary laterals of limited growth which develop on lateral roots) and parts of the tap root. Soil associated with these regions of the root system contained more reductants and chelating agents than the bulk soil. Soil from around the roots ofL. albus exhibited much greater reducing and chelating activity than that associated with the roots of rape and buckwheat.

Key words

Iron Lupins Lupinus albus L. Manganese Phosphorus Proteoid root Soil/Root interface 

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Copyright information

© Martinus Nijhoff/Dr W. Junk Publishers 1982

Authors and Affiliations

  • W. K. Gardner
    • 1
  • D. G. Parbery
    • 1
  • D. A. Barber
    • 2
  1. 1.Department of Plant Sciences, School of Agriculture and ForestryUniversity of MelbourneParkvilleAustralia
  2. 2.Department of Agriculturevictorian Crops Research InstituteHorshamAustralia

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