What is Meristematic Tissue

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·         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


Photo of a Fish on Corals

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

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