Question

Describe the structural feature of meristematic tissue

Answer 1

Tissue

Maristematic tissue is composed of actively dividing cells. It is located on the growth point in stem tip. Cambium of dicotyledon, and root tip.


Types of Meristematic Tissue


Based on the location

Meristematic tissue can be distinguished into apical, intercalary, and lateral meristems. Apical meristem is located on the tip of rood and stem. Intercalary meristem is located between mature tissues, e.g at the base of nodes in grass stem. Lateral meristem can be found growing laterally with the organ where the tissue is located, e.g. vascular cambium and cork cambium (phelogen). 


The development of stem tip into primary meristem


Based on the origin

Maristematic tissue can be distinguished into primary and secondary meristems. Primary meristem develops directly from embryonic cells, while secondary meristem develops from differentiated tissues (e.g cambium).

Basically, there are three types of primary meristem as follows.


Protoderm, which is the outer layer of developing tissues (derived from apical meristem)Ground meristem, Which is meristem which form ground tissues.Procambium, which is meristem which form vascular tissues.


Cell  Characteristics of Meristematic Tissue


Cell the compose meristematis tissue have several acharacteristics as follows.

Their cell wall is very thin, except on vascular cambium cell wall which is very thick in particular circumstances.They consist of a lot of protoplasms which generally do not have food storage and crystal, except on phelogen. Moreover, inside the protoplasm, there are plastid in the form of proplastids.Most of apical meristems have small vacuole, only some have larger vacuole (e.g invascular cambium.

Answer 2

Meristematic tissue is a group of cells that has power of continuous division.
Cells are immature and young
Meristematic tissue is commonly called as meristems.
Shape of cell: each cell is oval, rounded, polygonal or rectangular
Size: small
Intercellular space: Absent
Cell wall: thin walled made up of cellulose
Nucleus: single large and prominent
Reserved food: cell do not store food
Cell division: high capacity and continuous
Metabolic activity: very high