What is Meristematic Tissue - all global updates

What is Meristematic Tissue

·         Meristematic Tissue (Cells are capable of division)

§  A meristematic tissue (meristos = divisible) is a group of identical cells that are in a continuous state of division 

§  Some cells produced by meristematic tissue stop dividing and acquire certain changes (differentiation) to become permanent tissues of the plant


·         Based on location on the plant, the meristem is divided into three types:

§  Apical meristem

§  Found at the tips of roots, stem and branches 

§  Functions to increase length of these parts

§  Divided into three zones

·         Protoderm – form epidermal tissue

·         Procambium – form primary vascular tissues

·         Ground meristem – form cortex and pith


§   Intercalary meristem

§  Found in the nodal region, prominently in monocotyledons, e.g. grasses. 

§  It is derived from the apical meristem

§  Elongates the internodes


§  Lateral meristem

§  Found along the longitudinal axis of stem and root

§  E.g. Vascular cambium and cork cambium (phellogen)

§  Produces secondary permanent tissues

§  Increase thickness of stem and root



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References

Evans, W. C. (2009). Trease and Evans Pharmacognosy. India: Reed Elsevier Limited

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