Question

write 5 features of sclernchyma, collenchyma and pollenchyma?​

Answer 1

Sclerenchyma

1. The cells of sclerenchymatous tissue are dead.
2. The cells are long and narrow in appearance.
3. The walls of sclerenchyma cells are gently thickened with the deposition of lignin.
4. The cells are loosely packed without any intercellular spaces.
5. This tissue is present in in stems, around vascular bundles, in the veins of leaves and in the hard covering of seeds and nuts.

Collenchyma

1. The cells of this tissue are living, elongated and irregular thickened at the corners due to the deposition of pectin.
2. They have very little intercellular spaces
3. Collenchyma occurs below the epidermis in leaf stalks, leaf mid-ribs herbaceous dicot stems and leaf tendrils.
4. Their cell walls have simple pits.
5. Collenchyma is characterized by the deposition of extra cellulose and pectin.

Parenchyma

1. It is the most common simple tissue in plants with relatively little specialisation.
2. The cell wall is thin and made up of cellulose.
3. The parenchyma tissues are found in soft parts of the plant such as cortex of roots, ground tissues in stems and mesophyll of leaves.
4. The cells are isodiametric in shape.
5. There is a large central vacuole and a dense peripheral cytoplasm containing a distinct nucleus