Question

$\bold{Question:-}$

What is collenchyma?​

Answer 1

✨Collenchyma✨

➳The cells of this tissue are living, elongated and in regularly thickened at the corners.

➳ Intercellular space are very little

➳ It occurs below the epidermis in leaf stalks, leaf mid-ribs and herbaceous dicot stems.

➳ It is characterized by deposition of extra cellulose and pectin.

➳ It cells appears to be circular oval or polygonal in cross-section.

➳ Their cell walls have simple pits

➳ They often contain chloroplast

➳ It provides elasticity, rigidity and flexibility to the plant.

Answer 2

Answer:

➸Collenchyma cells are alive at maturity and contain protoplasm.

➸They provide support to the growing tissues of plant.

➸In a plant cell, the cell wall which is made up of cellulose is dead but the plasma membrane and the protoplasm of the cell made up of protein and lipids are always living and keep performing the vital life activities like all other living cells.

➸It is a living tissue composed of more or less elongated cells with thick primary non lignified walls.

➸ This cell is the simple permanent tissue which generally has a thin wall with irregular thickening at the corners.

➸Cell wall thickness is strongly affected by mechanical stress upon the plant. It is a living cell and it contains the protoplasm.