Calculation of Translocation Coefficients from Phloem Anatomy for use in Crop Models |
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| Authors: | Sheehy, J. E. Mitchell, P. L. Durand, J.-L. Gastal, F. Woodward, F. I. |
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| Affiliation: | International Rice Research Institute, P.O. Box 933, 1099 Manilla, Philippines and Creative Scientific Solutions, 38 Meadow View, Marlow Bottom, Buckinghamshire, SL7 3PA, Department of Animal and Plant Sciences, University of Sheffield S10 2UQ, UK and INRA, Station d'Ecophysiologie des Plantes Fourragères, Domaine des Verrines, 86600 Lusignan, France |
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| Abstract: | Translocation coefficients, computed for unit ground area, arerequired in crop models as part of the simulation of the partitioningof assimilates. An equation for translocation is derived byconsidering pressure-driven flow and the physical dimensionsof the pathway in the phloem. Numerical estimates of the translocationcoefficients for grasses and trees are calculated using anatomicaldata. The values found are compatible with published rates oftranslocation in the phloem.Copyright 1995, 1999 Academic Press Model, Münch, phloem, sieve tube, translocation |
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