In tissue culture experiments, leaf mesophyll cells are put in a culture medium to form callus. This phenomenon may be called as
Senescence
Differentiation
Dedifferentiation
Development
living differentiated cells that have lost the capacity to divide can regain the capacity of division under certain conditions. This phenomenon is termed dedifferentiation. The text specifically cites parenchyma cells made to divide under controlled laboratory conditions (plant tissue culture) as an example of this process .
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