Question

name the plant hormones and state their functions​

Answer 1

Hormone Function

Gibberellins Break the dormancy of seeds and buds; promote growth

Cytokinins Promote cell division; prevent senescence

Abscisic Acid Close the stomata; maintain dormancy

Auxins Involved in tropisms and apical dominance

Answer 2

Explanation:

Auxin: It is synthesised in the plant shoot tips, developing embryos, flowers and seeds. It promotes the growth of adventitious roots and fruits, helps inhibit abscission and controls ageing and senescence.

Cytokinin: They are found in sites where cell division occurs actively, such as in root tips, seeds, fruits and leaves. They work along with auxins to promote cell division and they also help delay senescence.

Gibberellin: It is synthesised mainly in the developing regions of the stem and in seeds. It stimulates cell division and cell elongation in these regions.

Abscisic acid: It is present mostly in developing seeds where it promotes abscission and inhibits growth. It also helps promote closing of stomata in leaves under water stress conditions.

Ethylene: It is produced mainly in the plant roots, ripening fruits, and the apical meristem of shoots. It helps stimulate the ripening of fruits and also initiates abscission in the fruits and leaves.