Difference 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.

By the end of this lesson you will be able to: • Label the parts of a plant cell. • List the types of tissues in a plant and describe where they are located and the specialized cells that make up each of these tissues. • Summarize the key functions of those tissues. Plant cell The graphic below illustrates the key parts of the plant cell. Diagram of a plant cell. Licensed from Cell wall The outer covering of the cell, the cell wall is a rigid membrane that contains cellulose (a carbohydrate that is indigestible for humans). The cell wall protects the parts inside, and the cellulose molecules in the wall provide the support and rigidity needed to maintain the cell’s three-dimensional structure. Cell membrane The cell membrane is made up of layers of protein and lipid (fats and oils are examples of lipids). The cell membrane is semi-permeable — it allows select compounds in and out, but blocks other types of compounds. If the cell were like a bicycle tire, the cell wall would be the thick, protective outer tire tread and the cell membrane would be the inner tube. Chloroplast An organelle (“organelle” is the generic name for a plant organ) that contains chlorophyll. In the chloroplast, light energy is captured and the first steps are taken in the chemical pathway that converts the energy in light into forms of energy that the plant can transport and store, like sugar and starch. Chloroplasts are not evenly distributed throughout the plant but, as you might expect, are concent...

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...

Article shared by : This article will update you about the differences between parenchyma, collenchyma and sclerenchyma. Difference # Parenchyma: 1. Parenchyma originate from protoderm and ground meristem. 2. Cells are living. 3. Cells are usually isodiametric but various shapes are also found. 4. The cell wall is thin, uniformly thickened and cellulosic. 5. The cell walls are primary in nature without sculpturing. 6. The walls show plasticity. 7. There are primary pit fields on the cell wall. 8. Parenchyma tissue have extensive intercellular spaces. 9. Parenchyma forms a ground to hold collenchyma and scle­renchyma. 10. The main function is storage. Difference # Collenchyma: 1. Collenchyma originate from pro-cambium like cells in the ground meristem. 2. Cells are living. 3. Cells are generally elongated. 4. The cell walls are unevenly thick with more thickenings at the cor­ners and composed of pectin and other substances. 5. The cell walls are primary in nature with no sculpturing. 6. Cells walls are usually plastic. 7. Pits are rare on cell wall. 8. Very less intercellular spaces are present with occasional inter­locking ends. 9. It remains embedded in paren­chyma. 10. Storage and mechanical rigidity are the main functions. Difference # Sclerenchyma: 1. Sclerenchyma originates from protoderm procambium and ground meristem. 2. Cells are dead. 3. Cells are isodiametric (sclereids) and elongated (fibres). 4. The cell walls are uniformly thick and composed of lignin and othe...

The ground tissue system arises from a ground tissue Figure 5). The cells of each simple tissue bear the same name as their respective tissue. Parenchyma, often the most common ground tissue, takes its name from the Greek para, meaning beside, and egchnma, meaning the contents of a pitcher (literally, something poured beside), indicating its Parenchyma cells are capable of see below Prosenchyma cells are Bougainvillea ( Figure 5) consists of collenchyma cells that also have retained their protoplasts. They are closely related to parenchyma, although they have thick deposits of Collenchyma is found chiefly in the cortex of stems and in leaves. For many herbaceous plants it is the chief supporting tissue, especially during early stages of development. In plants in which secondary growth occurs, the collenchyma tissue is only temporarily functional and becomes crushed as woody tissue develops. Collenchyma is located along the Collenchyma cells, polygonal in Figure 5) is composed of The two principal types of sclerenchyma cells are Musa textilis; Agave sisalana; Asparagaceae), and many other fibre products. Fibres are found in various parts of the plant and are particularly common in the vascular tissues ( see below). Evolution of the transport process Water and nutrients flow through conductive tissues (xylem and phloem) in plants just as the bloodstream distributes nutrients throughout the bodies of animals. This internal The importance of transport processes in plants incre...

\( \newcommand\): This diagram shows the three major cell types found in plants. In the upper left, parenchyma cells have an evenly thickened primary wall (shaded with stripes in the illustration). The primary wall of parenchyma cells is quite thin, though it has been widened in the diagram to make it easier to see. To the right of the parenchyma, collenchyma cells also have only a primary wall, but it is unevenly thickened, giving them a chunky appearance. Unlike parenchyma cells, the primary wall of a collenchyma cell is often quite thick. On the bottom half of the diagram, sclerenchyma cells are shown with a thick secondary wall (unshaded) that develops within the primary wall (shaded). Eventually, the primary wall of the sclerenchyma cells will die away. Artwork by Nikki Harris, Parenchyma Parenchyma cells are characterized by an even, relatively thin primary wall. Figure \(\PageIndex\): A cross section of a Ranunculus root showing parenchyma cells filling the cortex. Note the evenly thin cell walls. These cortex cells contain many starch grains. Photo by Berkshire Community College Bioscience Image Library, CC0, via Wikimedia Commons. Collenchyma Collenchyma cells are characterized by an uneven, relatively thick primary wall. Figure \(\PageIndex\): Collenchyma cells. Left: Angular collenchyma is a supportive tissue found in peppermint and other species like celery. 200X magnification. Taken in the Plant Lab at CU:Boulder. Photo by Spencer Llerandi, Sclerenchyma Scler...

The ground tissue system arises from a ground tissue Figure 5). The cells of each simple tissue bear the same name as their respective tissue. Parenchyma, often the most common ground tissue, takes its name from the Greek para, meaning beside, and egchnma, meaning the contents of a pitcher (literally, something poured beside), indicating its Parenchyma cells are capable of see below Prosenchyma cells are Bougainvillea ( Figure 5) consists of collenchyma cells that also have retained their protoplasts. They are closely related to parenchyma, although they have thick deposits of Collenchyma is found chiefly in the cortex of stems and in leaves. For many herbaceous plants it is the chief supporting tissue, especially during early stages of development. In plants in which secondary growth occurs, the collenchyma tissue is only temporarily functional and becomes crushed as woody tissue develops. Collenchyma is located along the Collenchyma cells, polygonal in Figure 5) is composed of The two principal types of sclerenchyma cells are Musa textilis; Agave sisalana; Asparagaceae), and many other fibre products. Fibres are found in various parts of the plant and are particularly common in the vascular tissues ( see below). Evolution of the transport process Water and nutrients flow through conductive tissues (xylem and phloem) in plants just as the bloodstream distributes nutrients throughout the bodies of animals. This internal The importance of transport processes in plants incre...

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.

Article shared by : This article will update you about the differences between parenchyma, collenchyma and sclerenchyma. Difference # Parenchyma: 1. Parenchyma originate from protoderm and ground meristem. 2. Cells are living. 3. Cells are usually isodiametric but various shapes are also found. 4. The cell wall is thin, uniformly thickened and cellulosic. 5. The cell walls are primary in nature without sculpturing. 6. The walls show plasticity. 7. There are primary pit fields on the cell wall. 8. Parenchyma tissue have extensive intercellular spaces. 9. Parenchyma forms a ground to hold collenchyma and scle­renchyma. 10. The main function is storage. Difference # Collenchyma: 1. Collenchyma originate from pro-cambium like cells in the ground meristem. 2. Cells are living. 3. Cells are generally elongated. 4. The cell walls are unevenly thick with more thickenings at the cor­ners and composed of pectin and other substances. 5. The cell walls are primary in nature with no sculpturing. 6. Cells walls are usually plastic. 7. Pits are rare on cell wall. 8. Very less intercellular spaces are present with occasional inter­locking ends. 9. It remains embedded in paren­chyma. 10. Storage and mechanical rigidity are the main functions. Difference # Sclerenchyma: 1. Sclerenchyma originates from protoderm procambium and ground meristem. 2. Cells are dead. 3. Cells are isodiametric (sclereids) and elongated (fibres). 4. The cell walls are uniformly thick and composed of lignin and othe...

\( \newcommand\): This diagram shows the three major cell types found in plants. In the upper left, parenchyma cells have an evenly thickened primary wall (shaded with stripes in the illustration). The primary wall of parenchyma cells is quite thin, though it has been widened in the diagram to make it easier to see. To the right of the parenchyma, collenchyma cells also have only a primary wall, but it is unevenly thickened, giving them a chunky appearance. Unlike parenchyma cells, the primary wall of a collenchyma cell is often quite thick. On the bottom half of the diagram, sclerenchyma cells are shown with a thick secondary wall (unshaded) that develops within the primary wall (shaded). Eventually, the primary wall of the sclerenchyma cells will die away. Artwork by Nikki Harris, Parenchyma Parenchyma cells are characterized by an even, relatively thin primary wall. Figure \(\PageIndex\): A cross section of a Ranunculus root showing parenchyma cells filling the cortex. Note the evenly thin cell walls. These cortex cells contain many starch grains. Photo by Berkshire Community College Bioscience Image Library, CC0, via Wikimedia Commons. Collenchyma Collenchyma cells are characterized by an uneven, relatively thick primary wall. Figure \(\PageIndex\): Collenchyma cells. Left: Angular collenchyma is a supportive tissue found in peppermint and other species like celery. 200X magnification. Taken in the Plant Lab at CU:Boulder. Photo by Spencer Llerandi, Sclerenchyma Scler...