What is meant by meristematic tissues ? Explain its various types.

Explanation

Growth in plants is largely to specialised regions of active cell division called meristems.

Plants have kinds of meristems. They are as follow.
(A) Apical Medistems : The meristems which occur at the tips of roots and shoots and produre primary tissues are called apical meristems.
Root apical meristem occupies the tip of a root while the shoot apical meristem occupies the distant most region of the stem axis.
During the formation of leaves and elongation of stem, some cells.left behind. from shoot apical meristem, conslitute the axillary bud. Such buds are present in the axils of leaves and are capable of forming a branch or a flower.
(B) Itercalary Meristem : The meristem occurs between matures tissues is known a intercalary meristem. They occur in grasses and regenerate parts removed by the grazing harbivares.
Both apical meristems and intercalary meristems are primary maristems because they appear early to life of plant and contribute to the formation on the primary plant body.
(C) Lateral Meristem : The meristem that occurs in the mature regions of roots and shoots of many plants, particularly those that produce woody axis and appear later than primary meristem is called the secondary or lateral meristem.
They are cylindrical meristems. Fascicular vascular cambium, interfascicular cambium and cork-cambium arer examples of lateral meristems. These are responsible for producing the secondary tissues.