Stem and Shoot Growth: PGRs like gibberellins are used to promote stem elongation and shoot growth
in crops. This is particularly beneficial for crops like wheat, rice, and corn to increase plant
height and improve yield potential.
Fruit Development: PGRs such as auxins and cytokinins are applied to promote fruit set,
enlargement, and ripening. They can enhance fruit quality, size, color, and uniformity, leading to
improved marketability and consumer appeal.
Root Development: PGRs like auxins stimulate root growth and development, leading to a stronger
root system that improves nutrient and water uptake. This is beneficial for establishing young
plants, enhancing drought tolerance, and improving overall plant health.
Flowering and Pollination: PGRs can influence flowering time, flower number, and flower size in
crops. They can also enhance pollination and fruit set by improving flower structure, attracting
pollinators, and increasing pollen viability.
Seed Germination: PGRs are used as seed treatments to improve germination rates, seedling vigor,
and early root development. They can overcome seed dormancy, promote uniform emergence, and enhance
seedling establishment in various crops.
Disease Resistance: Some PGRs have been found to induce systemic acquired resistance (SAR) in
plants, enhancing their ability to resist pathogens and diseases. This indirect effect on plant
immunity can reduce the need for chemical pesticides and improve crop resilience.
