differentiate between types of meristematic tissues with their location and functions in plants
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Meristematic tissues are a group of young cells that are in a continuous state of division.
These tissues are mostly found at the apices of root and shoot.
The main characteristics of cells of meristematic tissues are:
Types of Meristems:
I. Classification based on origin and development:
On the basis of origin and development of initiating cells, meristems can be divided into three types:
(1) Promeristem or priordial meristem:
A group of young meristematic cells of a growing organ. It is the early embryonic meristem from which other advanced meristems are derived. In a plant, it occupies a small area at the tip of stem and root. It further divides to form primary meristem.
(ii) Primary meristem:
These are derived from promeristem. They are present below the promeristem at shoot and root apices. These cells divide and form permanent tissues.
(iii) Secondary meristem:
It is derived from primary permanent tissues which have the capacity of division e.g. Cork-cambium, cambium of roots and inter fascicular cambium of stem.
(2) Apical meristem:
These are found at the apices or growing points of root and shoot and bring about increase in length. It includes both pro-meristem as well as primary meristem.
These tissues are mostly found at the apices of root and shoot.
The main characteristics of cells of meristematic tissues are:
Types of Meristems:
I. Classification based on origin and development:
On the basis of origin and development of initiating cells, meristems can be divided into three types:
(1) Promeristem or priordial meristem:
A group of young meristematic cells of a growing organ. It is the early embryonic meristem from which other advanced meristems are derived. In a plant, it occupies a small area at the tip of stem and root. It further divides to form primary meristem.
(ii) Primary meristem:
These are derived from promeristem. They are present below the promeristem at shoot and root apices. These cells divide and form permanent tissues.
(iii) Secondary meristem:
It is derived from primary permanent tissues which have the capacity of division e.g. Cork-cambium, cambium of roots and inter fascicular cambium of stem.
(2) Apical meristem:
These are found at the apices or growing points of root and shoot and bring about increase in length. It includes both pro-meristem as well as primary meristem.
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