The Sugar Content of Cell Walls and Intercellular Spaces in Sugar-Cane Stems and its Relation to Sugar Transport

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Abstract
In sugar-cane stems which contain large amounts of sucrose the concentration of sucrose in the volume external to the vacuoles was found to approach the concentration present in the vacuoles (20%). It was shown that this sucrose is situated mainly in the aqueous phase of the cell walls and intercellular spaces of the storage parenchyma cells. It is suggested that the high concentrations of sucrose in this compartment contribute to the maintenance of the high levels of sucrose present in the vacuoles of parenchyma of cane grown under conditions of high sugar storage. The presence of high concentrations of sucrose in the cell walls strongly favours the view that intercellular sugar transfer occurs mainly via the cell walls rather than via plasmo-desmata.

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