Question

differentiate b/w collenchyma&sclerenchyma

Answer 1

Collenchyma:

1. It is simple permanent tissue consisting of living cells.

2. In T.S. the cells are polygonal with localized thickening on their walls confined to the corners only. Cells contains protoplasm when young.

3. In L.S. the cells are elongated with longitudinal strips of thickening.

4. It is elastic and also strong enough to provide mechanical support.

Sclerenchyma:

1. It is also simple permanent tissue but consisting of dead cells.

2. In T.S. the cells are also polygonal with uniform thickening. Cell walls are very much thickened due to deposition of lignin leaving a narrow lumen.

3. In L.S. the cells are long, narrow and pointed.

4. It is rigid and provides mechanical support to plant.