Explain the properties of plant hormones by stating the characteristics of growth regulators.

(N/A) Plant growth regulators (PGRs) are small,simple molecules of diverse chemical composition.
They can be indole compounds (e.g.,$IAA$),adenine derivatives (e.g.,$kinetin$),derivatives of carotenoids (e.g.,$abscisic$ $acid$),terpenes (e.g.,$gibberellic$ $acid$),or gases (e.g.,$ethylene$).
Key characteristics of PGRs include:
$1$. They are synthesized in various parts of the plant and can be transported to other regions.
$2$. They act in very small concentrations to regulate physiological processes.
$3$. They control growth,differentiation,and development within the plant.
$4$. They can act synergistically or antagonistically to influence plant responses to environmental stimuli.