Question

Describe Histogen theory.

Answer 1

Answer:

plant development

analysis has led to the histogen theory, which proposes that the three principal tissues of the root—vascular cylinder, cortex, and epidermis—originate from three groups of initial cells, or histogens, in the apical meristem—plerome, periblem, and dermatogen respectively.

Answer 2

Histogen theory is the theory that says that histogens are the three layers of tissues present in apical meristem that give rise to different parts of a plant. It was introduced by Johannes von Hanstein in 1868. ... Plerome is the innermost region or core of apical meristem that gives rise to stelar region.