Abstract
The rates of 14C02 fixation and translocation of 14C labelled assimilates were measured in field experiments at two times of the day in two sugar-cane clones known to have different rates of sucrose uptake in vitro but the same weight of leaf per unit weight of cane. The rate of 14C02 fixation and the velocity and rate of translocation were significantly greater at both times in the clone with the higher rate of sucrose uptake in vitro. The velocities of translocation were 2*18 and 2-36 cm/min1 for the clone with high sucrose uptake and 1 -46 cm min-1 at both times in the clone with low uptake. It is suggested that among sugar-cane clones the ability of their canes to store sugar may play a part in determining their rates of photosynthesis and translocation.
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