giberelliinit

Giberellins are a class of plant hormones that play a crucial role in various growth and developmental processes. They are a group of structurally similar diterpenoid acids, with over 100 different gibberellins identified in plants. The most well-known and biologically active member is gibberellin A3 (GA3), often referred to as gibberellic acid.

These plant hormones are synthesized primarily in young leaves, developing seeds, and root tips. Their functions are diverse and include promoting stem elongation, breaking seed dormancy, stimulating germination, and influencing flower development and fruit set. For example, gibberellins can cause plants to grow taller by increasing the rate of cell division and elongation in the stem. They also play a significant role in the transition from vegetative growth to reproductive growth.

In agriculture, gibberellins are widely used to improve crop yields and quality. They are applied to enhance fruit size, particularly in grapes, and to promote uniform ripening. They can also be used to induce flowering in some plants and to overcome dormancy in seeds, allowing for earlier planting. The application and effects of gibberellins are carefully managed to achieve desired outcomes in plant cultivation.