Stelar secondary growth
1. Occurs in the stelar region and secondary growth starts first.
2. Occurs by the activity of vascular and interfascicular cambium.
3. Produces secondary xylem and secondary phloem tissue.
ADVERTISEMENTS:
4. Annual ring formation occurs.
5. Leads to formation of bark.
6. Produces more conductive tissues.
Extra stelar secondary growth
ADVERTISEMENTS:
1. Occurs in the extra stelar region after stelar secondary growth starts.
2. Occurs by the activity of cork cambium.
3. Produces cork cells and parenchyma cells.
4. No annual ring formation.
ADVERTISEMENTS:
5. Leads to formation of periderm and lenticels.
Produces protective tissues.