Zone of cell differentiaton Procambium Zone of cell elongation Zone of cell division Apical merist Root
3300 PROTOXYLEM POLE 3000 ROTOPHLOEM 2700 2400 ROOT 2100 CORTEX PERICYCLE 1800 ENDODERMIS 1500 MATURE XYLEM ELEMENT IMMATURE XYLEM ELEMENT 1200 EPIDERMIS MATURE PART OF SIEVE TUBE 900 IMMATURE PART OF SIEVE TUBE PROTODERM 600 300 GROUND MERISTEM 0 um PROC AMBIUM APICAL MERISTEM ROOT CAP
