The characteristic feature of which cells have lignified thickening at...
Characteristics of Sclerenchyma Cells:
Sclerenchyma cells are one of the three types of ground tissue cells found in plants. They are characterized by their thick, lignified cell walls, which provide strength and support to the plant. The lignified thickening at the corners of these cells is a characteristic feature of sclerenchyma cells.
Understanding Sclerenchyma Cells:
Sclerenchyma cells are dead at maturity and have highly thickened secondary cell walls. These walls contain a complex polymer called lignin, which imparts rigidity and strength to the cells. The lignified thickening at the corners of sclerenchyma cells provides additional structural support and makes them suitable for their functions.
Functions of Sclerenchyma Cells:
Sclerenchyma cells have two main functions:
Support: The thick and lignified cell walls of sclerenchyma cells provide mechanical support to the plant. They help in maintaining the rigidity and stability of various plant parts such as stems, roots, and vascular tissues.
Protection: Sclerenchyma cells also play a role in protecting the plant against mechanical stress and damage. Their tough and rigid cell walls act as a barrier and prevent the entry of pathogens and pests.
Types of Sclerenchyma Cells:
There are two main types of sclerenchyma cells:
Fibers: Sclerenchyma fibers are elongated cells with tapering ends. They are found in bundles and provide strength to tissues such as wood and bark.
Sclereids: Sclereids are shorter, irregularly shaped cells that are found in various plant parts. They contribute to the hardness of nutshells, seed coats, and fruit pits.
Conclusion:
Sclerenchyma cells possess lignified thickening at the corners, which is a characteristic feature of these cells. This lignification provides strength, rigidity, and support to the plant, making sclerenchyma cells essential for its growth and development.