Abstract
Cane leaf discs secrete sucrose into 10~4 M iodoacetate (IOA) (Schoolar and Edelman, 1970). This secretion was found to occur from edges of leaf material cut at right angles to the venation but the phloem did not appear to be involved in the secretion process. Secretion seemed to be dependent on the carbon flow within the sugar-cane leaf, i.e. from the mesophyll and the bundle sheath cells, and the action of IOA could probably be ascribed to a diversion of this flow.
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