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Regions of Root

Introduction

  • A typical root consists of four main regions from tip onwards which are as follows:
      1. Root cap
      2. Region of meristematic activity
      3. Region of elongation
      4. Region of maturation

Detailed Explanation:

Regions of Root:

regions-of-root

1. Root cap:

  • The apex of the root is covered by a thimble-like structure called root cap.
  • It is multicellular and parenchymatous.
  • It protects the tender apex of the root as it makes its way through the soil.
  • They are rich in Golgi vesicles.
  • Due to the presence of the root cap at the apex, the growth of the root is subterminal.

root-cap

2. Region of meristematic activity:

  • This layer is a few millimetres above the root cap.
  • It consists of thin-walled meristematic cells having dense protoplasm and a prominent nucleus.
  • These cells divide very rapidly to produce new cells.

3. Region of elongation:

  • The cells proximal to the meristematic region undergo rapid elongation and enlargement.
  • Responsible for the increase in the length of the root.

4. Region of maturation:

  • It lies proximal to the region of elongation.
  • Here, the elongated cells finally get differentiated and mature.
  • Some of the epidermal cells of this region differentiate to form fine, delicate and thread-like structures called the root hairs.
  • Root hairs help to increase the surface area of absorption of water and minerals from the soil.
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