can you please tell the difference between the secondary growth in roots and stem????

Please find below the solution to the asked query
 

Secondary growth in stem	Secondary growth in root
The cambial ring is circular from the beginning.	The cambial ring is wavy first and later becomes circular
Periderm mainly originates from cortical cells	Periderm mainly originates from pericycle
The cambial is partially primary and partially secondary in origin.	The cambial ring is wholly secondary in origin.
Cork production is more	Cork production is less
Lenticels are prominent	Lenticels are not prominent

Hope this information will clear your doubts about the secondary growth in roots and stem. 

Regards