Question

define diffrentiation,dediffrentiation and rediffrentiation​

Answer 1

Differentiation: The process which leads to maturation of cells is called differentiation. During differentiation, a few or major changes happen in protoplasm and cell walls of the cells. Let us take example of tracheary element. The cells of a tracheary element lose their protoplasm and develop a very strong, elastic, lignocellulosic secondary cell walls. These changes help the tracheary element to carry water to long distances even under extreme tension.

Dedifferentiation: A differentiated cell can regain its capacity for cell division under certain conditions. This phenomenon is called dedifferentiation. Formation of interfascicular cambium and cork cambium from fully differentiated parenchyma cells is an example of dedifferentiation.

Redifferentiation: A dedifferentiated plant cell once again loses its capacity to divide and becomes mature. This phenomenon is called redifferentiation.

Answer 2

The cells derived from the root apical and shoot apical meristem and cambium differentiate and mature to perform specific functions. This act leading to maturation is termed as differentiation.

Plants show and other interesting phenomena that 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.

While doing so ,such dedifferentiated meristem are able to divide and produce cells that once again have lost the capacity to divide but mature to perform specific functions i.e., that is the redifferentiation.