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Difference between parenchyma collenchyma and sclerenchya tissues?

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February 23, 2011 4:03PM

• Sclerenchyma tissue has cells that have very thick lignified cell walls and are dead at maturity.

• The primary functions of sclerenchyma are support and protection.

• Some sclerenchyma cells are elongated, while other types are cubical or highly branched.

• Elongated sclerenchyma cells are called fibres and provide strength and support to plant parts. Plants fibres have been used extensively by people to make twine, rope and cloth.

•Collenchyma tissues are mainly found under the epidermis in stems in the large veins of leaves.

• The cells are composed of living, elongated cells running parallel to the length of organs that it is found in (up the side of the stem)

• Collenchyma cells have thick cellulose cell walls which are thickened at the corners.

• Intercellular air spaces are absent or very small.

• The cells contain living protoplasm (cytoplasm and nucleus) and they sometimes contain chloroplasts.

•Cells in parenchyma tissue are thin walled and are often block-shaped.

•Parenchyma cells remain alive at maturity and are abundant in roots, stems, leaves and fruit.

•The primary functions of parenchyma tissue are photosynthesis in leaves and storage of food as starch granules.

•You would expect such tissues to have many chloroplasts and/or amyloplasts