Question

What is the gibberellin hormone?

Answer 1

Gibberellin hormone

1. Gibberellins are plant growth regulators. Gibberellic acid (GA3 ) was one of the first gibberellins to be discovered. All GAs are acidic.
2. They produce a wide range of physiological responses in plants. Their ability to cause an increase in length of the axis is used to increase the length of grapes stalks.
3. There are more than 100 gibberellins reported from widely different organisms such as fungi and higher plants. They are denoted as GA1, GA2, GA3, and so on.

Functions:

1. Gibberellins are plant growth regulators that facilitate cell elongation, and help the plants to grow taller.
2. They also play major roles in germination, elongation of the stem, fruit ripening, and flowering.

Uses:

1. Spraying sugarcane crops with gibberellins increases the length of the stem, thus increasing the yield by as much as 20 tons per acre.
2. Spraying juvenile conifers with GAs hastens the maturity period, thus leading to early seed production.
3. Gibberellins also promote bolting (internode elongation just before flowering) in beet, cabbages, and many plants with rosette habits.