Morphology of
flowering plants
1. Root
2. Stem
3. Leaf
4. Flower
5. Fruit
6. Seed
dr.aarif
,Morphology of Root
Characteristics :
1. Root is defined as the descending part of the plant axis.
2. It is positively geotropic.
3. It is positively hydrotropic
4. It is negatively phototropic.
5. It develops from the radicle of the embryo during seed germination.
6. Roots are generally non green and cylindrical.
7. They produce only similar organs i.e. secondary and tertiary roots
8. They do not show nodes and internodes
dr.aarif
, Morphology of Root
1. Region of root cap:
- The tender apex of the root is protected with a multicellular cap
like structure called root cap.
- The cells of the root cap secrete mucilage for lubricating the
passage of root through the soil.
- In many hydrophytes like Pistia and Eichhornia, root cap is
replaced by root pocket.
2. Region of cell division or meristematic region:
- It is a small region about 1mm in length.
- This is the growing part of the root and is protected by the root
cap.
- It is made up of thin walled, compactly arranged meristematic
cells which have the power of division.
- This region helps in longitudinal growth by the addition of new
cells
3. Region of elongation:
- It lies just above the meristematic region.
- The cells of this region are newly formed and they elongate
rapidly. This increases the length of the root.
- The cells of this region help in the absorption of mineral salts
dr.aarif
flowering plants
1. Root
2. Stem
3. Leaf
4. Flower
5. Fruit
6. Seed
dr.aarif
,Morphology of Root
Characteristics :
1. Root is defined as the descending part of the plant axis.
2. It is positively geotropic.
3. It is positively hydrotropic
4. It is negatively phototropic.
5. It develops from the radicle of the embryo during seed germination.
6. Roots are generally non green and cylindrical.
7. They produce only similar organs i.e. secondary and tertiary roots
8. They do not show nodes and internodes
dr.aarif
, Morphology of Root
1. Region of root cap:
- The tender apex of the root is protected with a multicellular cap
like structure called root cap.
- The cells of the root cap secrete mucilage for lubricating the
passage of root through the soil.
- In many hydrophytes like Pistia and Eichhornia, root cap is
replaced by root pocket.
2. Region of cell division or meristematic region:
- It is a small region about 1mm in length.
- This is the growing part of the root and is protected by the root
cap.
- It is made up of thin walled, compactly arranged meristematic
cells which have the power of division.
- This region helps in longitudinal growth by the addition of new
cells
3. Region of elongation:
- It lies just above the meristematic region.
- The cells of this region are newly formed and they elongate
rapidly. This increases the length of the root.
- The cells of this region help in the absorption of mineral salts
dr.aarif
