Percentage of ¹³C distribution in fully developed leaves, apical shoots and clusters 1 hour and 24 hours after pulsing. Means were based on 4 replicates. The same upper case letters indicate no significant difference within the plant part, p = 0.05. The same lower case letter indicate no significant difference within the treatment, p = 0.05. DF-0 = no leaves removed; DF-6 = leaves removed from 6 basal nodes; DF-10 = leaves removed from 10 basal nodes at bloom.