The key difference between exarch and endarch type of arrangement is based on the arrangement of protoxylem and metaxylem in the plant organs.
What is Exarch Xylem?
Exarch is a type of arrangement of primary xylem where protoxylem lies towards the periphery and metaxylem lies towards the centre or pith of the organ.
What is Endarch Xylem?
Endarch is a type of arrangement of primary xylem where protoxylem lies towards the centre and metaxylem lies towards the periphery of the organ.
Read More: 5 Key Difference Between Exine and Intine
Difference Between Exarch and Endarch
| Exarch | Endarch |
|---|---|
| Protoxylem is located in the periphery. | Protoxylem is located in the centre. |
| Metaxylem is located towards the centre. | Metaxylem is located towards the periphery. |
| Growth of xylem is centripetal. | Growth of xylem is centrifugal. |
| Exarch condition is seen in roots of plants. | Endarch condition is seen in shoots or stems of plants. |
Similarities Between Exarch and Endarch Arrangement
- Exarch and Endarch both are types of primary xylem development partners.
- They are differentiated based on vascular arrangement.