Single Choice

Thickening in collenchyma mainly due to deposition of

ACellulose
BPectin
Correct Answer
CLignin
DSuberin

Solution

Collenchyma is simple living tissue with thick non-lignified walls that provide mechanical support and tensile strength to the growing organs and is present in the organ that does not develop very woody. Pectin deposition imparts water retaining capacity and makes it a spongy tissues.
Lignin is hydrophobic and inhibits water absorption from otherwise highly hydrophilic cell walls thereby facilitate water conduction by the plant's vascular tissues efficiently. It also provides mechanical strength to the tissues. It is the main component of sclerenchymatous cell walls, which together with collenchymas makes a major part of mechanical tissues of the plant.
Cellulose is present in thin cell walls of parenchyma. It does not provide mechanical strength or water repelling attributes. Suberin is a waterproofing waxy substance, which restricts the water movement and is present in form of bands or strips that run around the radial and end walls of the endodermal cells and forms casparian strips.


SIMILAR QUESTIONS

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