Question

Give reasons: Intercellular spaces are absent in sclerenchymatous tissue.

Answer 1

Sclerenchyma is the tissue that gives the plant its stiffness and hardness. Sclerenchyma is the plant’s supporting tissue. Sclerenchyma cells are divided into two types: cellular fibres and sclereids. Cellulose, hemicellulose, and lignin make up their cell walls. In plant tissues that have stopped elongating, sclerenchyma cells are the main supporting cells. Sclerenchyma fibres are important economically since they are used to make a variety of fabrics.

Complete answer:
Sclerenchyma is one of three forms of ground, or fundamental, tissue in plants, the others being parenchyma (living thin-walled tissue) and collenchyma (living thick-walled tissue) (living support tissue with irregular walls). Sclerenchyma cells come in a variety of sizes and forms, but there are two basic types: fibres and sclereids.
Sclerenchyma tissue is the plant’s dead simple permanent tissue. Sclerenchyma cells are tightly packed without intercellular spaces, similar to tiles in a mosaic floor, to offer strength, stiffness, flexibility, and elasticity to the plant, allowing it to tolerate diverse strains. Intercellular space is lacking in sclerenchyma tissue because the cells are dead and the cell walls have thickened due to the deposition of lignin, which functions as a cement.
Sclerenchyma cells are crucial reinforcing and supporting elements in plant sections that have ceased elongating due to their stiff, thick walls. The distinction between sclereids isn’t always obvious: transitions can occur even within the same plant.

Note:
The phenomenon of lignin buildup in plant cells, which occurs after the conclusion of cell growth and at the time of secondary thickening, is referred to as "lignification". The stiff portions of the plant body, such as the leaf vein, stem, branches, trunk, and bark, are dominated by sclerenchymatous tissue. Instead of being a dead cell, sclerenchyma tissues aid cell integrity and conduction.