Lateral meristems

Lateral meristems - bark tissues that break off in large...

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Lateral meristems Vascular cambium . Some plants grow in diameter by producing new tissues laterally from a cylinder  of tissue called the  vascular cambium , which extends throughout the length of the plant from the  tips of the shoots to the tips of the roots. It is present in all  perennial  and in some  annual  plants.  Tissues produced by cell divisions of the vascular cambium are  secondary tissues Cork cambium . Cork cambia (singular: cambium), also called  phellogens , are found in the bark of  roots and stems of woody plants where they produce  cork  cells. The cork cambia originate just  under the  epidermis  of the primary body and in some tree species are long cylinders running  parallel to the vascular cambium. In other species, more discrete, disk-like cork cambia in the trunks  produce flat plates of 
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Unformatted text preview: bark tissues that break off in large scales as the tree ages. Intercalary meristem . Grasses have intercalary meristems located along the stems near the nodes. Cell divisions in this tissue push the stem upward. Grasses and other monocots have no lateral meristems so any lateral increase in size is the result of primary tissue cell enlargement, not cell divisions. Primary (transitional) meristems The cells produced by divisions in the apical meristem region are soon identifiable as three zones of distinct tissues that differentiate below the apical meristems. These are the primary meristems , called sometimes the transitional meristems: the protoderm , the procambium , and the ground meristem . They give rise to the tissue systems of the primary plant body....
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