What is the most active layer of a dicot root?
GeneralClass 12AllAnswered 27 Mar 2026
Answer
The pericycle is considered the most active layer in a dicot root. This single layer of parenchyma cells is located just inside the endodermis and surrounds the vascular tissue. The pericycle is remarkable for retaining its meristematic capability and performs several crucial functions:
- Lateral root formation: Initiates and produces lateral (branch) roots through periclinal divisions
- Vascular cambium formation: Contributes to the formation of vascular cambium during secondary growth
- Cork cambium formation: May give rise to cork cambium in older roots
- Repair and regeneration: Helps in wound healing and tissue regeneration
This meristematic potential makes the pericycle essential for root branching, secondary growth, and the root's overall adaptability to environmental conditions.
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