What are the three types of Meristematic tissue?

These tissues continuously form a number of new cells because they are totipotent i.e. can give rise to various cell types of the body. These tissues are plant tissues. Meristematic tissues have cells which are continuously dividing. Growth of their cell is limited to certain regions.

Characteristics of Meristematic Tissue:

1)    These are found in the growing regions of the plant, e.g., shoot tip, root tip and cambium.

2)  Its cells are immature and are capable of undergoing repeated division throughout their life.

3)  These cells are spherical, oval, polygonal or rectangular in shape

4)  Their cytoplasm in dense, cell wall is thin, nucleus is single and large, and vacuoles (single or free or no vacuoles), if present are smaller.

5)   Intercellular space are lacking.

Classification of Meristematic Tissue:

According to their position on the plant body, they are of three types: a) Apical   b) Lateral   c) Intercalary.

a)   Apical meristem:- It is found at the growing tips of stems (shoot) and roots. Its cells are roughly spherical, alike and divide continuously to make new cells. Thus, the root and stem of a plant grow in length (primary growth). In the cells of the apical meristem are typically small and nearly spherical. They have dense cytoplasm and relatively some small vacuoles.

b)  Lateral meristem:- They are rectangular in shape and found on the lateral sides of roots and stems. These divide in tangential plane. Example is cork cambium and cambium of vascular bundles. These are cause thickening of stem and root.

c)   Intercalary meristem:- It is a part of the apical meristem, which is separated from the apex during the growth. It is found at the base of the leaves or internodes (on either side of the node on twigs). They increase the length of the organ.

CLICK HERE FOR:-

Simple permanent tissue 

Complex permanent tissue 

Protective tissue

 

SHARE

Ishan Kumar