State the location and function of different types of meristems. | NCERT solution | Class 12 Biology | Unit-6 Anatomy of Flowering Plants

Q.1:- State the location and function of different types of meristems.

 

Answer

Meristems are specialised regions of plant growth. The meristems mark the regions where active cell division and rapid division of cells take place. Meristems are of three types depending on their location.

→ Apical meristem: These are found at the tips of roots and shoots. The shoot apical meristem is present at the tip of the shoots and its active division results in the elongation of the stem and formation of new leaves. The root apical meristem helps in root elongation.

→ Intercalary meristem: These occurs between the mature tissues present at the bases of the leaves of grasses. It helps in the regeneration of grasses after they have been grazed by herbivores.

Both, apical meristems and intercalary meristems are primary meristems because they appear early in life of a plant and contribute to the formation of the primary plant body.

→ Lateral meristem: These occurs in the mature regions of roots and shoots of many plants and helps them in adding secondary tissues to the plant body and in increasing the girth of plants. It is called the secondary meristem as it appears later in a plant’s life.