Different types of simple permanent tissues
Differences between Parenchyma and Collenchyma
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Characteristic features
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Parenchyma
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Collenchyma
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Cell wall
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It is a living tissue contains a thin cell wall made up of cellulose.
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It is a living tissue consists of a thick cell wall made up of cellulose, pectin, and hemicellulose.
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Arrangement of cells
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Cells are loosely arranged with intercellular spaces, and their thickness isuniform.
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The tissue consists of uneven well-developed thickenings at places adjacent to intercellular spaces.
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Function
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It helps in the storage of food, nutrients and water.
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Being a mechanical tissue gives flexibility and elasticity to the plant and prevents leaves' tearing.
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Location
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It is present in the inner and outer parts of plant organs.
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It is located mainly in the arial parts of the plant. It is restricted to sub epidermal parts of the plant.
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Differences between Collenchyma and Sclerenchyma
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Characteristic features
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Collenchyma
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Sclerenchyma
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Nature of cells
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Cells are living.
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Cells aredead.
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Cells are made up of
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Cells contains protoplasm (It has a central vacuole and peripheral cytoplasm with an elongated nucleus).
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Cells areempty.
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Intercellular spaces and lumen
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Intercellular spaces are absent, and the lumen of the cell is wide.
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Intercellular spaces are absent, and the lumen of the cell is narrow.
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Thickening of cell wall
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It consists of an uneven thickening cell wall is made up of cellulose.
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It consists of a uniform thickening cell wall, which is lignified.
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Pits
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Pits are simple straight, and unbranched.
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Pits are simple oblique; sometimes, they are branched.
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Function
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Being a mechanical tissue gives flexibility and elasticity to the plant and prevents leaves' tearing.
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It helps to provide mechanical support to the plant.
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Meristematic tissue and permanent tissue
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Meristematic tissue
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Permanent tissue
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The cells divide repeatedly.
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The cells are formed from meristematic tissue and do not divide.
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Cells are undifferentiated.
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Cells are fully differentiated.
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Intercellular spaces are absent.
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Intercellular spaces are present.
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Vacuoles are absent.
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Vacuoles are present.
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Metabolism happens at a high rate.
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Metabolism happens at a low rate.
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Cell wall of its cells are thin.
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Cell wall of its cells can be thick or thin.
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It has living cells
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It has both living or non-living cells.
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