Kinetics of C-14 Translocation in Soybean: III. Theoretical Considerations 1

AUTOR(ES)

Fisher, Donald B.

RESUMO

Based largely on data from soybean, some mathematical models are derived to describe the transport kinetics of 14C-photosynthate. The effects of leaf size, leaf shape, and translocation velocity on the rate of tracer efflux from the leaf are considered, and it is shown that the duration of these effects will approximate the time required for tracer to reach the petiole from the farthest point of the leaf. This duration is designated as the “kinetic size” of the leaf. Although its effect will be slight in the case of soybean (about 2 to 3 minutes), a considerable effect of the kinetic size will be found in the case of large leaves, or when the translocation velocity is low.

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