Question

what is periderm? how does periderm formation takes place in dicot plant

Answer 1

a second lateral cambium called the phellogen or cork cambium ,is the source of the periderm a protective tissue that replaces the epidermis when the secondary growth displaces and ultimately destroys the epidermis of the primary plant body

Answer 2

Answer:

1. Periderm is composed of the phellogen, phellem, and phelloderm.
2. During secondary growth, the outer epidermal layer and the cortical layer are broken because of the cambium.
3. To replace them, the cells of the cortex turn meristematic, giving rise to cork cambium or phellogen.
4. It is composed of thin-walled, narrow and rectangular cells.
5. Phellogen cuts off cells on its either side.
6. The cells cut off toward the outside give rise to the phellem or cork.
7. The suberin deposits in its cell wall make it impervious to water.
8. The inner cells give rise to the secondary cortex or phelloderm.
9. The secondary cortex is parenchymatous.