Introduction

The cells derived from root apical and shoot-apical meristems and cambium differentiate and mature to perform specific functions. The living differentiated cells then lose the capacity to divide but regain it under certain conditions.

Real Life Question:

How long do plants grow?

Key Words / FlashCards

Learning aids / Gadgets

Places to visit :

Library

Practical examples around us

What you learn in Theory:

Differentiation: The cells derived from root apical and shoot-apical meristems and cambium differentiate and mature to perform specific functions. This act leading to maturation is termed as differentiation. During differentiation, cells undergo few to major structural changes both in their cell walls and protoplasm. For example, to form a treachery element, the cells would lose their protoplasm. They also develop a very strong, elastic, Lignocellulosic secondary cell wall, to carry water to long distances even under extreme tension. Dedifferentiation: The living differentiated cells that by now have lost the capacity to divide can regain the capacity of division under certain conditions. This phenomenon is termed as dedifferentiation. For example, formation of meristems – interfascicular cambium and cork cambium from fully differentiated parenchyma cells. Redifferentiation: While undergoing dedifferentiation plant cells once again lose their capacity to divide and become mature. This process is called redifferentiation.