Question

Give a comparative accounts of auxins, gibberlins, cytokinins and abscisic acid?

Answer 1

Mainly two types of plant hormones.

one is growth promoter and another one is growth inhibitor.

1. Growth promoter :

Auxins, gibberellin and cytokinins are the plant hormone that promotes growth in the plant in different ways.

Auxin : Responsible for elongation in phototropism and gravitropism.
And other growth processes in plant life cycle.

Cytokinins : Involves in plant growth and division.

Gibberellin : stimulate seed germination, shoot elongation and flower maturation.


2.Growth inhibitor :

Abscisic acid : inhibitor of stem elongation, and inducing bud dormancy.

Ethylene : controls fruit ripening, flower wilting, leaf fall and and stimulating the conversion of the starch and acids to sugar.