Fine Structure of Hydrolysed Primary Walls in Tracheary Elements of Petiolar Xylem in Eucalyptus delegatensis

Abstract

The hydrolysed lateral primary walls of tracheary elements of the petiolar xylem of Eucalyptus delegatensis were examined by electron microscopy. Vessel-vessel and vessel—tracheid hydrolysed walls were strikingly different in appearance from tracheid—tracheid walls. The difference seemed to be in the degree to which the primary walls were hydrolysed. The observations suggest the wall hydrolysis to be an ordered and controlled process.