REGULATION AND PLANT GROWTH BY HORMONES

Auxin

a plant hormone that plays a vital role in plant growth and development, regulating processes like cell elongation, root formation, and apical dominance

Apical dominance: the phenomenon where the main central stem of the plant grows more strongly than the side stems due to the influence of auxin.

ethylene

a plant hormone that regulates fruit ripening, flower wilting, and leaf fall, influencing processes such as stress response and senescence.

Abscisic acid

Abscisic acid (ABA), a plant hormone, plays a crucial role in plant stress responses, dormancy, and seed maturation, acting as a "stress hormone"

When seed is dormant Abscisic acid is high and gbl low.

When seed is germinating Aba is low and GBL high

Seed germination and dormancy dynamics.

Processes regulated by hormones like abscisic acid and gibberellins, affecting the transition between dormancy and germination in seeds. Seed dormancy is maintained by abscisic acid, while gibberellins promote germination and break dormancy.