Question

Spraying sugarcane crop with a plant hormone increases length of plants and increases yield by as much as $20$ tonnes per acre. The hormone is

• A. Gibberellin
• B. Auxin
• C. Cytokinin
• D. ABA

Answer 1

The correct option is A Gibberellin

Gibberellin or Gibberellic Acid is a plant growth hormone produced in the embryos, roots, and young leaves of plants.

It helps in the elongation of stems in dwarf plants. This ability to cause an increase in the length of the axis is used to increase the length of grapes stalks. It also causes fruits like apple to elongate and improve its shape.

Sugarcane stores carbohydrate as sugar in their stems. Spraying sugarcane crop with gibberellins increases the length of the stem, thus increasing the yield by as much as 20 tonnes per acre.

So, the answer is A.