Differentiation, Dedifferentiation and Redifferentiation
Cell fate changes and the concept of plasticity. (Biology › Plant Growth and Development, NEET UG syllabus.)
What is Differentiation, Dedifferentiation and Redifferentiation?
The process by which cells derived from meristematic tissues mature to perform specific functions, undergoing structural and physiological changes.
Key points
- Define differentiation, dedifferentiation, and redifferentiation.
- Explain the sequence and interrelation of these processes.
- Provide examples of each process in plants.
- Relate these concepts to plant cell plasticity and totipotency.
Common exam trap
Confusing dedifferentiation with differentiation: Differentiation is initial specialization, dedifferentiation is *reversing* that specialization to regain division.
Definitions
- Term
Differentiation
- Meaning
The process by which cells derived from meristematic tissues mature to perform specific functions, undergoing structural and physiological changes.
- Term
Dedifferentiation
- Meaning
The process where already differentiated cells, which have lost their capacity to divide, regain the ability to divide under certain conditions.
- Term
Redifferentiation
- Meaning
The process where cells formed by dedifferentiation, which are now capable of division, once again lose their capacity to divide and mature to perform specific functions.
- Term
Plasticity
- Meaning
The ability of plant cells to alter their developmental pathway in response to environmental or internal stimuli.
- Term
Totipotency
- Meaning
The inherent capacity of a single plant cell to develop into a whole plant.
Learning objectives
Define differentiation, dedifferentiation, and redifferentiation.
Explain the sequence and interrelation of these processes.
Provide examples of each process in plants.
Relate these concepts to plant cell plasticity and totipotency.
Understand the significance of these processes in plant development and tissue culture.
Prerequisites
Basic understanding of plant cell structure.
Knowledge of plant tissues (meristematic vs. permanent tissues).
Familiarity with primary and secondary growth in plants.
Common mistakes
Confusing dedifferentiation with differentiation: Differentiation is initial specialization, dedifferentiation is *reversing* that specialization to regain division.
Assuming all differentiated cells can dedifferentiate: While many can, not all do or can do so easily.
Not understanding the sequence: Differentiation → Dedifferentiation → Redifferentiation.
Thinking these processes only occur in artificial conditions; they also occur naturally (e.g., wound healing, secondary growth).
Keywords
Differentiation
Dedifferentiation
Redifferentiation
Plasticity
Totipotency
Meristematic cells
Permanent cells
Callus
Secondary growth
Tissue culture
Xylem
Phloem
Cambium
Practice preview
The formation of interfascicular cambium from mature parenchyma cells in the medullary rays during secondary growth is an example of which cellular process?…
medium
Which of the following statements accurately distinguishes between primary and secondary growth in terms of cellular differentiation processes?…
hard
The process by which cells originating from meristems mature and attain specific structures and functions is known as:…
easy