This hormone is responsible for cell wall loosening or relaxation. This allows the cell wall to be stretched like a rubber when subjected to tension. Name the hormone.

Auxin

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Cytokinin

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Ethylene

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Gibberellins

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Solution

The correct option is A
Auxin

Auxins play a role in cell elongation by loosening the cell wall and relaxing it. Rate of cell elongation is proportional to the concentration of auxin. Auxin allows the cell wall to be stretched like a rubber band under tension.

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Similar questions

Plant Hormone	Functions
1. Auxin	Helps in the growth of plant tissue.
2. Cytokinin	Promotes cell division, delays aging of cells.
3. Ethylene	Inhibits growth and causes wilting of leaves, promoting dormancy of buds.
4. Gibberellin	This is a gaseous hormone that causes the ripening of fruits

Question 03:

The effect of apical dominance can be overcome by which of the following hormone?
(a) IAA
(b) Ethylene
(c) Gibberellin
(d) Cytokinin

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