Question

State the location and function of different types of meristematic tissue in plants.

Answer 1

Hint: Meristematic tissues undergo continuous rapid cell division in the plants. These are the important tissues which are necessary for the plant growth. They are the specialized region of plant growth since they are actively involved in the cell division.

Complete answer: or Complete step by step answer:
These tissues are the active regions and so they remain young and fresh throughout the lifetime. These are the basic tissues which in the future develop into the organs of the plants. Each meristem is divided into the others. The cells that are at first which undergo the cell division are called initial meristems and the cells that come from the cell divisions are called derivative meristems. Based on the location and function meristematic tissues are classified into three types. They are

(1) Apical meristem
(2) Intercalary meristem
(3) Lateral meristem

Apical meristem:
These meristems are present at the tip regions of root, shoot, and leaves. They are the active regions in the cell division which helps in the growth and the elongation of root and shoot. It gives rise to new leaves and hence these are referred as primary tissues in the plant growth.
Intercalary meristem:
These meristems appear below the apical meristems and they are matured more than apical meristem. Intercalary meristem and the apical meristem are called primary meristem, because they appear in the earlier part of plant’s growth. These meristems help in the regeneration of a plant's part when it is detached or grazed by animals.
Lateral meristem:
They are called a secondary meristem because they occur at the later part of the plant growth. They are the matured tissues that occurred at the base of the shoot and top of the root.

Additional Information:
Reproduction may also take place asexually by budding, binary fission, fragmentation, spore formation, not involved in the fusion of gametes. Some of the multicellular organism also undergo asexual reproduction. Example for this reproduction is earthworm.

Note:
When a plant part is over-grazed by the animals like cow or goat, the regeneration or regrowth of the plant’s part takes place by the intercalary meristems. These are present at the lower base of the leaves and in the internode or node.