A Model to Describe the Partitioning of Photosynthate during Vegetative Plant Growth

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Abstract
An approach is described to the problem of modelling quantitatively the partitioning of photosynthate during vegetative plant growth. Two plant processes are important in the scheme: the first of these is the utilization of substrate for growth and how this utilization depends upon substrate concentration, the second concerns the transport of substrate between different plant parts and how this depends upon the substrate concentrations in the plant parts. In both cases simple phenomenological relations have been assumed which seem to be in reasonable accord with experimental data and with more basic theoretical considerations. The model is able to describe some of the features of steady-state vegetative plant growth in a natural manner. The limitations of the present formulation are considered, and the implications of this type of approach for whole-plant models are discussed.

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