The main functions or role of meristematic tissue (meristem) are as follows:

1. Meristematic tissues are actively dividing tissues of the plant.
   
   
2. They are responsible for the primary and secondary growth of the plant.
   
   
3. All new organ and their growth occur by the division of meristematic tissue.
   
   
4. Secondary tissue such as wood, cork is also formed due to the activity of meristematic tissue.
   
   
5. It helps in the formation of the reproductive shoot.
   
   
6. The apical meristem of the stem produces new leaves and branches.