The acquisition of phosphorus byLupinus albus L.
- Cite this article as:
- Gardner, W.K., Parbery, D.G., Barber, D.A. et al. Plant Soil (1983) 72: 13. doi:10.1007/BF02185090
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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.