Cells of the procambium and ground meristem are more vacuolated than those of the protoderm .
2.
Ground meristem the central region of the apical meristem from which the ground tissues of pith , cortex , medullary rays , and mesophyll differentiate . in root meristem it is also called periblem
3.
Signals were strong in the cell periphery of procambium , and longitudinal signals were stronger than lateral ones ; in root ground meristem cytoplasm , concentration in the perinuclear region was stronger than one in the cell periphery . in cell periphery of root ground meristem , distribution of actin mrna was heterogeneous , longitudinal signals were stronger than lateral ones ; in callus meristem cytoplasm , concentration in the perinuclear region was low ;