A Model for the Translocation of Photosynthate in the Soybean

Abstract
The transport of photosynthetically incorporated carbon down the soybean stem is discussed in terms of flow from a reservoir in the upper part of the plant. A comparison of this model with the experimental data from the preceding paper leads to an estimate of translocation velocity of about 60 cm. per hr. and to leakage of material from the sieve tubes of about o.8 per cent. per cm. of stem traversed. The effects of velocity distributions and delays in the translocation system are considered.