Difference between Protoxylem and Metaxylem
Difference between Protoxylem and Metaxylem are in tabular form below –
No. |
Protoxylem |
Metaxylem |
Definition |
||
1. | Xylem that is first formed, mature before the organ complete its elongation and persists in roots than stem, this is known as Protoxylem. | Xylem that is differentiated after protoplasm, cells are wider, have more tracheiary elements and are with scalariform or pitted thickening, this is known as Metaxylem. |
Lumen and Fibres |
||
2. | It has narrow lumen and absence of fibres. | It has wider lumen and presence of fibres. |
Matures |
||
3. | Maturation of protoxylem occurs before completion of the elongation of an organs (Of the Plant). | Maturation of metaxylem occurs after completion of the growth of an organs (Of the Plant). |
Lignification |
||
4. | This xylem do not show extensive lignification. | This xylem show extensive lignification. |
Water conducting efficiency |
||
5. | The protoxylem has less water conducting efficiency. | The metaxylem has more water conducting efficiency. |
Size of the Cell |
||
6. | Cells of the protoxylem are small when compared to metaxylem. | Cells of the metaxylem are large. |