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The Use of a Simple Dynamic Model to Interpret the Phosphate Response of Plants Grown in Solution Culture
M. A. SCAIFE
Annals of Botany
Vol. 40, No. 170 (November 1976), pp. 1217-1229
Published by: Oxford University Press
Stable URL: http://www.jstor.org/stable/42756398
Page Count: 13
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A previously published dynamic model of P uptake and plant growth has been applied to two sets of solution culture data: those of Rorison (1968) for two contrasting wild species, and those of Brewster, Bhat and Nye (1975) for onions. Apart from the logistic constants describing the growth curves of plants with adequate P, all other constants were independently obtained and assumed to be the same for all species. Plant weights, P concentrations and solution P concentrations are all reasonably well simulated by the model for both experiments. The big difference in responsiveness between fast-and slow-growing species in Rorison's experiment is shown to be attributable to differential depletion of the solutions. The use of simulation models which incorporate the depletion of the growing medium might be regarded as an alternative to attempting to eliminate depletion in such experiments.
Annals of Botany © 1976 Oxford University Press