Cell differentiation
/sɛl ˌdɪfəˌrɛnʃiˈeɪʃən/
Definition
Cell differentiation is the biological process by which unspecialized plant cells develop into cells with specific structures and jobs. During growth, cells switch on different genes and become specialized as xylem, phloem, epidermal, or guard cells. This differs from cell division, which increases cell number; cell differentiation changes cell identity and function. It occurs throughout plant development, especially in meristems, where new cells are produced and then specialized.
Biological Role
- Builds specialized tissues: In plants, cell differentiation produces xylem, phloem, epidermis, and other tissues with distinct jobs, allowing roots, stems, leaves, and flowers to function as integrated organs.
- Guided by meristems and signals: It is directed in meristems, the regions of active cell division, where plant hormones such as auxin and cytokinin help steer cells toward different developmental paths.
- Shapes visible plant form: Differences in cell fate influence leaf texture, stem strength, root hairs, stomata, and wood formation, so this process strongly affects both appearance and performance.
- Supports regeneration and propagation: Many plant cells can change developmental state and then differentiate again, which is why cuttings can form roots and why tissue culture can produce whole plants from small samples.
Related Terms
Meristem
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Cytokinin
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Auxin
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Gibberellin
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Chloroplast
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Chromosome
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Genotype
Genotype refers to a plant’s genetic makeup, the set of genes and gene variants it carries in its cells. It is a…
Organ
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