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The acquisition of phosphorus byLupinus albus L.

V. The diffusion of exudates away from roots: a computer simulation

Plant and Soil volume 72, pages 13–29 (1983)Cite this article

Summary

A model predicted that the concentration profile of exudate would be less steep and its concentration values higher for larger diameter roots and that rhizosphere volume/g of root would be maximised at a particular root size for a given exudation rate. Root hairs, if active in secretion, would increase the rhizosphere volume/g of root and the substrate concentrations in it. Proteoid roots would increase the concentration of diffusing substance even further, although the rhizosphere volume per g of root may decline due to overlap effects. These effects are discussed in relation to the rate and extent of reactions between exudates and the soil.

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Author notes

  1. W. K. Gardner & D. A. Barber

    Present address: Victorian Crops Research Institute, Private Bag 260, 3400, Horsham, Victoria, Australia

Authors and Affiliations

  1. Department of Plant Sciences, School of Agriculture and Forestry, University of Melbourne, 3052, Parkville, Australia

    W. K. Gardner, D. G. Parbery, D. A. Barber & L. Swinden

Authors
  1. W. K. Gardner
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  2. D. G. Parbery
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  3. D. A. Barber
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  4. L. Swinden
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Gardner, W.K., Parbery, D.G., Barber, D.A. et al. The acquisition of phosphorus byLupinus albus L.. Plant Soil 72, 13–29 (1983). https://doi.org/10.1007/BF02185090

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  • DOI: https://doi.org/10.1007/BF02185090

Key words

  • Exudation
  • Lupins
  • Lupinus albus L.
  • Micro-organisms
  • Proteoid roots
  • Rhizosphere