Abstract

The synthesis of a soluble uridylic acid containing polysaccharide and of the insoluble pollen tube wall have been studied. The time course of incorporation of arabinose into the soluble and wall fractions and the disappearance of label from arabinose in the soluble fraction and its corresponding increase in the pollen tube wall in pulse-chase experiments, suggest that the soluble polysaccharide is a large precursor subunit of some component of the cell wall.

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