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Collenchyma, plant support tissue composed of living elongated cells with irregular cell walls that are able to extend and can thus accommodate growing tissues, such as stems and leaves, and form the chief supporting tissue in herbaceous plants.
Collenchyma is a simple permanent tissue composed of living cells with thickened walls. It is a part of the ground tissue and provides support and mechanical strength to the newly formed plant organs.
Collenchyma cells are found in the secondary phloem of plants. Functions of these cells include: protection of the plant against mechanical injury, provide support for the vascular tissue, and acting as a sheath that regulates water flow.
Collenchyma (Figures \(\PageIndex{3-4}\)) is living supportive tissue that has elongated cells and an unevenly thickened primary cell wall. Its main function is the mechanical support of young stems and leaves via turgor.
Collenchyma is a living, elongated cell with irregularly thick cell walls, found mainly in the cortex of stems and leaves of plants. Collenchyma tissue forms the fundamental or ground tissues in plants along with parenchyma and sclerenchyma. Collenchyma was discovered by Scheilden in the year 1839.
Collenchyma tissue is a term given by a scientist named Schleiden in the year 1839. It is a kind of simple permanent supportive tissue that confers mechanical strength to the plant. The collenchyma cells appear as elongated cells with a non-uniform thickened cell wall.
Collenchyma cells provide mechanical support to the growing parts of plants, such as young stems, petioles (leaf stalks), and the outer layers of leaf veins. The primary function of collenchyma is to provide flexibility and strength to the plant. What is Collenchyma?
Parenchyma cells are found in every soft part of the plant, but collenchyma cells are found in specific part of the plant like leaves, stems, and petioles, whereas sclerenchyma cells are found in mature parts of the plants or trees.
Collenchyma cells have primary walls that are usually thickened especially at corners or edges. They function for structural support. Collenchyma cells are characterized by having a thickened primary cell wall that is not lignified.
Collenchyma cells are similar to parenchyma in which they are alive at maturity and can be isodiametric in shape. They have irregularly thickened primary cell walls (Fig. 7.3) and function as support in plants either during elongation growth or in plants without much secondary growth.