Question

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What is the difference between Parenchyma and Collenchyma?

Beside that one more thing.
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Answer 1

PARENCHYMA

• Parenchyma is an unspecialised simple permanent tissue.

• Their shape may be oval, round, polygonal or elongated in shape.

• They have thin cell wall made of cellulose.

• They have large intracellular spaces between them.

• They have neucleus in their cell and hence living.

• They are present in plant's roots, stems, leaves, flowers or fruits.

COLLENCHYMA

• Collenchyma is an specialised simple permanent tissue.

• Their shape may be transversed or longitudnal.

• They have thick wall with deposits of hemicellulose, and pectin.
• They have less intracellular spaces between them.

• They have neucleus in their cell and are living.

• It is found below epidermis of leaf stalk and leaf mid-ribs.

Answer 2

Answer:

$\huge\boxed{Parenchyma}$

•Parenchyma cells are present in the epidermis, cortex, pith and pericycle. Meristematic cells are parenchymatous.

•Thin cell wall

•Intercellular space is present

•No pectin deposition

•Shape - Isodiametric

•Permanent tissue

•$\red{functions}$

→Storage of food materials.

→ Chlorenchyma carries out photosynthesis.

→ Aerenchyma helps aquatic plants in floating and gaseous exchange.

$\huge\boxed{Collenchyma}$

•It occurs in the peripheral part of elongating organs like stem and petiole, usually appearing as a continuous ring beneath the epidermis.

•Unequally thickened cell wall

•Intercellular space is absent.

•Pectin deposition is found at the corners.

•Shape - Polygonal.

•Permanent tissue sometimes revives meristematic activity.

$\red{functions}$

→ It gives mechanical support.

→ It can resist bending and stretching caused by winds.

→ It carries out photosynthesis if chloroplast are present.

Explanation:

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