What is the difference between protoxylem and metaxylem?




1. First formed xylem.

2. Matures before the plant organs have completed their elongation.

3. Conations smaller elements.

4. Experience compressible and stretching forces.

5. Lacks tyloses.

6. Exhibits annular and spiral thickening in vessels.


1. Latter formed xylem.

2. Matures after the completion of growth of the plant organ.

3. Contains broader elements.

4. Not subjected to such force.

5. Contains tylosses.

Exhibits reticulate scalariform pitted thickening.