Plant hormone causing abscission of leaves, senescence, bud dormancy and inhibition of cell division is

IAA

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Ethylene

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Cytokinins

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ABA

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Solution

The correct option is D ABA
Abscisic acid is a plant hormone. It is also called as stress hormone. During stress condition like drought, abscisic acid concentration increases in plants. It inhibits cell division and induces bud dormancy. It also helps in abscission of leaves and hence the name given. It also stimulates senescence in plant.
Thus, the correct answer is option D.

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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

Name the plant hormone:
A. which inhibits growth and causes wilting of leaves.
B. which promotes cell division.

Hormones	Function
1.Ethylene	i. Helps in cell division.
2.Gibberellin	ii. Induces dormancy in buds and seeds
3.Cytokinin	iii. Helps in the ripening of fruit
4.Abscisic acid	iv. Causes bolting in plants

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