Differentiate between parenchyma collenchyma and sclerenchyma

Parenchyma: (1) Cells are thin walled and unspecialised. (2) These are living cells. (3) Cells are usually loosely packed with large intercellular space. (4) Stores nutrients and water in stem and roots. (5) Some cells contain chlorophyll, called as chlorenchyma and perform photosynthesis. Other cells have large air cavities, called as aerenchyma, which provide buoyancy to the hydrophytic plants. Sclerenchyma: (1) Cells are thick walled and lignified. (2) Tissues are made up of dead cells. (3) No intercellular spaces between the cells are found. (4) Provides strength to the plant parts. (5) The cells are long and narrow, make the plant hard and stiff. The tissue is present in the stem around vascular bundles, in veins of leaves and hard covering of seeds and nuts.

What is the difference between sclerenchyma and parenchyma tissues?A) Parenchyma- Cells are thin walled and unspecialised, Sclerenchyma- Cells are thick walled and lignifiedB) Parenchyma- Cells are thick walled and lignified, Sclerenchyma- Cells are thin walled and unspecialisedC) Parenchyma- Cells are thick walled and unspecialised, Sclerenchyma- Cells are thick walled and lignifiedD) Parenchyma- Cells are thin walled and specialised, Sclerenchyma- Cells are thick walled and lignified Parenchyma Sclerenchyma The cells are thin walled and not specialized. The cells are thick walled and lined. They are living cells. The tissues are made of dead cells. Cells are usually loosely packed with large intercellular spaces. There are no intercellular spaces between the cells. Stores nutrients and water in stems and roots Provides strength to the parts of the plant. Some cells contain chlorophyll called chlorenchyma and perform photosynthesis. Other cells have large air cavities, called aerenchyma, which provide buoyancy to hydrophytic plants. The cells are long and narrow, making the plant hard and stiff. The tissue is present in the stem around the vascular bundles, in the veins of the leaves and in the thickness of the seeds and nuts. Thus, the correct answer is option A i.e, Parenchyma- Cells are thin walled and unspecialised, Sclerenchyma- Cells are thick walled and lignified. Note: Collenchyma tissue consists of elongated cells with irregularly thickened walls. They provide st...

Table of Contents • • • • • • • • • How do parenchyma Collenchyma and Sclerenchyma differ based on the thickness of their cell wall? Parenchyma cells are found in all organs of the plant, seeds, fruits, flowers, leaves, stems and roots. Collenchyma cells consist of unevenly thick cell walls. Sclerenchyma cells are dead cells at their maturity, containing the thickest cell walls. How do you identify parenchyma Collenchyma and Sclerenchyma? The cells provide mechanical support to the plant body. The parenchyma also acts as a storage tissue for food, air and water. Cells of sclerenchyma tissue are higly lignified with very thick cell walls and obliterated lumen. Cells are usually elongated and polygonal in shape in cross-section. How would you differentiate between a Collenchyma and Sclerenchyma cell? Unlike the collenchyma, Sclerenchyma is composed of dead cells with very thick cell walls and supports tissue in plants. Collenchyma cells are generally living cells with a thick primary cell wall. They are dead cells with extremely thick secondary cell walls. Collenchyma allows plant organs to stretch and elongate. READ ALSO: Can I invest in a Roth IRA if I have a 401k? What are the main differences between parenchyma and Collenchyma? Parenchyma and Collenchyma Cells and its Differences Parenchyma Collenchyma The wall of a cell consists of only cellulose. The cell walls comprise of pectin and hemicellulose. The parenchyma has intercellular space within cells. There is no or ver...

2.2 Ground tissues The main tissue types of the ground tissue system are parenchyma, collenchyma and sclerenchyma. Parenchyma have thin walls of cellulose, whereas collenchyma have cell walls with thickened areas of additional cellulose. Sclerenchyma cells have lignified cell walls. They can be further categorised into narrow long cells (fibers) and cells of various other shapes (sclereids). 2.2.1 Parenchyma Figure 2.3. Parenchyma cells with blue green thin cellulose cell walls. When parenchyma cells are modified to create tissues with air spaces for buoyancy or aeration of tissues, then the tissue is described as aerenchyma rather than parenchyma. Figure 2.4. Aerenchyma in the stem of the aquatic monocot Potamogeton. Large air spaces can be seen between the cells of the cortex. There is a single layer of epidermal cells and behind that a single layer of cortical parenchyma cells, then aerenchyma tissue for buoyancy and movement of oxygen to the submerged tissues. 2.2.2 Collenchyma Figure 2.5.a. Collenchyma cells of Fraxinus. Upper cells are parenchyma, collenchyma with large dark cell walls and squat rectangular dermal cells at lower surface. Figure 2.5.b. Collenchyma cells in celery that are unstained and have large white cell walls. 2.2.3 Sclerenchyma Sclerenchyma cells have lignified cell walls. They can be of two broad types: sclereids and fiber cells. 2.2.3.1 Sclereids Figure 2.6.a. Sclerenchyma cells with thick cells walls that are stained red due to lignin in the c...

Difference Between Parenchyma and Collenchyma Cells A cluster of similar cells performing the same, specialized function is known as a tissue. Since plants are multicellular enclosing a huge number of cells, each performing an activity. Plant tissues are of two types – Meristematic and Non-meristematic or permanent tissues. Permanent tissues furthermore are divided into simple permanent tissue and complex permanent tissue. Simple permanent tissues are furthermore classified into – parenchyma, collenchyma and sclerenchyma. In this article – we focus on the differences between Parenchyma Cells • These are the living plant cells known to repair and heal and also to store food, forms a thin layer known as primary cell wall of the plant. They occur as a continuous mass, widely distributed from stems, roots to leaves and fruits • Generates other special cells and tissues • Isodiametric in shape, having thin cell walls hence experience pressure and force around the cells, therefore, cells increase its volume capacity to equalize all-over pressure on the cells • Cells composed of cellulose and hemicellulose • Show abundance in cell organelles such as – Golgi bodies, ribosomes, Chloroplast, Endoplasmic Reticulum, and other constituents such as pigments, fats, starch, proteins. Collenchyma Cells • Collenchyma is known to render mechanical support to plants by protecting the delicate inner structure of plants • They have thick cell walls composed of cellulose, hemicellulose and p...

Table of Contents • • • • • • • • • • • • • • • • • • • • • • Comparison Table Factors Parenchyma Cells Collenchyma Cells Sclerenchyma Cells Cell Type Isodiametric cells Elongated polygonal Long, narrow cells Occurrence Fruits and leaves Petioles and young stems Matured stems Function Photosynthesis & gaseous exchange Mechanical support and flexibility Food transport and mechanical Nature of Cell Living Living Dead Composition of Cell Wall Cellulose Cellulose, pectin, and hemicelluloses Lignin Thickness of Cell Wall Thin Unequally thin Thick Intercellular Spaces Present Absent Absent What are Parenchyma Cells? Parenchyma cells are simple living cells. They have a thin, elastic cell wall comprising cellulose and hemicellulose. These cells contain small vacuoles. Roots, stems, and leaves of all vascular plants contain parenchyma tissues. However, unlike Types of Parenchyma Cells Parenchyma cells are categorized into different types based on their components and function. Storage Parenchyma: They serve as a food and water storage unit. Plants benefit themselves from the Chlorenchyma: Chlorenchyma cells present in the leaf help in photosynthesis. Secretory Parenchyma: They have resins and release sticky substances and other secretions. Aerenchyma: These cells have larger intercellular spaces for the gaseous exchange. They are present in aquatic plants to help them in their buoyancy. Functions of Parenchyma Cells • They help in the • Parenchyma cells engage in meristematic acti...