Question

What is periderm? How does periderm formation take place in dicot stem?..​

Answer 1

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The outer layers of tissue of woody roots and stems, consisting of the cork cambium and the tissues produced by it, such as cork.

How does periderm formation take place in dicot stem?..

▪The formation of periderm occurs during secondary growth.

▫During this process, to replace the broken outer epidermal layer and the cortical layer, the cells of the cortex turn meristematic.

▪As a result of this, cork cambium or phellogen is formed.

▫ The phellogen is composed of thin-walled, narrow and rectangular cells.

▪ Later on, the phellogen cuts off cells on its either side.

▫The cells of the outer side give rise to the phellem or cork which due to the deposition of suberin in its cell wall is impervious to water.

▪ Similarly, the inner side forms secondary cortex or phelloderm which is mainly parenchymatous in nature.

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Answer 2

hey mate...

here is your answer...

The corky outer layer of a plant stem formed in secondary thickening or as a response to injury or infection.

During secondary growth, the outer epidermal layer and the cortical layer are broken because of the cambium. To replace them, the cells of the cortex turn meristematic, giving rise to cork cambium or phellogen. It is composed of thin-walled, narrow and rectangular cells.

Phellogen cuts off cells on its either side. The cells cut off toward the outside give rise to the phellem or cork. The suberin deposits in its cell wall make it impervious to water. The inner cells give rise to the secondary cortex or phelloderm. The secondary cortex is parenchymatous.

hope it helps...