Question

what is periderm? How is it developed

please don't copy paste answer​

Answer 1

Answer:

Phellogen,Phellem,Phhelloderm are collectively known as Periderm.

Explanation:

it is a outer protective secondary tissue.

that grow after the rupture of epidermis and outer cortical layers of primary plant body.

so,sec. growth in the cortex with help of cork cambium is the result of sec. growth by  vascular cambium because latter caused rupture and therefore the need of replacement.

Due to the continuous activity of cork cambium, pressure builds up on the remaining layers peripheral to phellogen .

Ultimately the layers peripheral to phellogen die and slough off.