Question

Hormones that affect flowering in plants

• A. Florin acetic acid
• B. Florigen
• C. Indole Acetic acid
• D. Indole butyric acid

Hint:

The name gives it away: Flori-gen $\rightarrow$ Flower-generator. It travels from "Leaf to Bud" to start the reproductive phase.

Answer 1

The Correct Option is B

Step 1: Understanding the Question:
The question asks for the specific plant hormone (phytohormone) responsible for the induction of flowering in plants.
Detailed Explanation:

• Florigen: This is the hypothetical "flowering hormone" first proposed by Mikhail Chailakhyan in 19 It is produced in the leaves under specific day-length conditions (photoperiodism) and is then translocated to the shoot apical meristem to trigger the transition from vegetative to reproductive growth (flowering). Modern science identifies the protein FT (Flowering Locus T) as the primary component of florigen.

• Indole Acetic Acid (IAA) (C): This is the primary natural Auxin. It is involved in cell elongation, apical dominance, and root initiation, but its primary role is not the induction of flowering.

• Indole Butyric Acid (IBA) (D): A synthetic auxin primarily used in nurseries for inducing rooting in cuttings.

• Florin acetic acid (A): This is a fictitious or incorrectly named chemical in this context.

Step 2: Final Answer:
The hormone specifically associated with flowering is Florigen.