Question

Gibberellins do not cause

• A. Shortening of genetically tall plants
• B. Stimulation of seed germination
• C. Promotion of parthenocarpy
• D. Induction of $\alpha$ - amylase synthesis in barley

Answer 1

The correct option is A Shortening of genetically tall plants

Gibberellins are growth promoting phytohormones. Gibberellins promote stem elongation in many plants. When gibberellin is applied to a plant, particularly certain dwarf varieties, this elongation may be spectacular. Some corn and pea plants that are dwarfs as a result of one or more mutations grow to a normal height when treated with gibberellin. They stimulate seed germination by inducing hydrolytic enzymes like amylase in cereals. They are also used along with auxins in production of parthenocarpic fruits.