Generalized Scheme for Plant Cell Differentiation in regard to Significant Temporal Events

 
Meristematic Cells
Isotropic Orientation of Cell Division & Cell Expansion Isotropic Orientation of Cell Division & Cell Expansion Isotropic Orientation of Cell Division & Cell Expansion Isotropic Orientation of Cell Division & Cell Expansion Isotropic Orientation of Cell Division & Cell Expansion Isotropic Orientation of Cell Division & Cell Expansion Isotropic Orientation of Cell Division & Cell Expansion Isotropic Orientation of Cell Division & Cell Expansion Anisotropic Orientation of Cell Division & Cell Expansion Anisotropic Orientation of Cell Division & Cell Expansion Anisotropic Orientation of Cell Division & Cell Expansion
Isotropic Orientation of  Cell Expansion Longitudinal Orientation of  Cell Expansion Radial Orientation of  Cell Expansion Isotropic Orientation of  Cell Expansion Isotropic Orientation of  Cell Expansion Anisotropic Orientation of  Cell Expansion Localized Apical Intrusive Growth Localized Apical Intrusive Growth Apical Intrusive Growth Anisotropic Orientation of  Cell Expansion Anisotropic Orientation of  Cell Expansion
Thin Primary Thin Primary Thin Primary Thin Primary Secondary Secondary Secondary Secondary Secondary Secondary Thick Primary
I I I I Lignification Lignification Lignification Lignification Lignification Lignification I
I I I I Nuclear Enlargement Nuclear Enlargement Nuclear Enlargement Nuclear Enlargement ? ? I
I I I I Apoptosis Apoptosis Apoptosis Apoptosis Apoptosis Apoptosis I
I Vacuolation, Seasonal Accumulation of Ergastic Substance Vacuolation, 
Seasonal Accumulation of Ergastic Substance		 Vacuolation, Accumulation of Ergastic Substance and/or  Maturation of Plastids I I I I I I Maturation of Plastids
Meristematic Vascular Cambium,  
Fusiform Initial		 Vascular Cambium,  
Rays Initials		 Parenchyma Brachysclereids Macrosclereids Astrosclereids Trichosclereids Fibers, Fiber-Tracheids   
Tracheids		 Vessel Elements Collenchyma
14 9 5 10 0 0 0 0 0 0 0?