Solveeit Logo
Login

Question

Biology Question on Secondary Growth

Periderm is produced by

A

vascular cambium

B

fascicular cambium

C

phellogen

D

intrafascicular cambium.

Answer

phellogen

Explanation

Solution

Phellogen forms phellem on the outer face and phelloderm on the inner.

  1. The vascular cambiumproduces secondary vascular tissues and ray parenchyma.
  2. Fascicular cambium is a strip of cambium that is present between the xylem and phloemof a vascular bundle.
  3. Phellogen is a ring of cambium formed in the cortex of the dicot stem, by the dedifferentiation of parenchyma.
  4. Intrafascicular cambium is a strip of cambium present between the xylem and phloem of a vascular bundle.

Therefore, the periderm is produced by phellogen. The 3 layers that form the periderm are phellem, phellogen, and phelloderm.

So, the correct option is C - phellogen.