Give three differences between parenchyma and collenchyma
Answers
Difference
Parenchyma:
1. The cell wall is commonly thin but uniform in thickness.
2. It provides mechanical strength only when the cells are fully turgid.
3. Parenchyma is found in both the outer and inner parts of plant organs.
Collenchyma:
1. The cell walls develop extra thickenings at places (tangential walls, angles or adjacent to intercellular spaces).
2. Collenchyma is a living mechanical tissue.
3. Collenchyma is mostly restricted to the sub-epidermal parts of aerial plant organs.
Parenchyma:
1. The cell wall is commonly thin but uniform in thickness.
2. It provides mechanical strength only when the cells are fully turgid.
3. Parenchyma is found in both the outer and inner parts of plant organs.
4. It does not have a high refractive index.
5. It shows several types of modifications.
6. It occurs in both primary and secondary structures of plants
7. It has the ability to dedifferentiate and form secondary meristem.
Collenchyma:
1. The cell walls develop extra thickenings at places (tangential walls, angles or adjacent to intercellular spaces).
2. Collenchyma is a living mechanical tissue.
3. Collenchyma is mostly restricted to the sub-epidermal parts of aerial plant organs.
4. It usually has high refractive index.
5. Modifications are very few.
6. It occurs in only aerial primary body parts of the plants.
7. The ability to dedifferentiate is nearly absent.