Question

Which of the following helps in preventing the premature falling of fruit and leaf at early stages?

• A. Auxins
• B. Ethylene
• C. Cytokinins
• D. Gibberellic acid

Answer 1

The correct option is A

Auxins

The correct option is A.

Explanation of correct option:

1. Auxins are plant hormones, generated mostly by roots and stem tips.
2. It aids in the prevention of early leaf and fruit drops.
3. It accelerates the fall of mature and old leaves and fruits.

Explanation of incorrect options:

Option B:

1. The gaseous hormone ethylene is a primary regulator of stress reactions and plays a large part in plant growth and development.
2. It limits vegetative development by limiting cell elongation by communicating with auxins.

Option C:

1. In tissue culture, cytokinins accelerate cell division and trigger the production of shoot buds.
2. They behave as antagonists to auxins.

Option D:

1. Gibberellic acid is also known as a plant growth regulator.
2. As the name suggests, it has the potential to boost production.
3. Its function is to increase fruit size, reduce citrus flowering, improve tree health and decrease fruit drop.

Final Answer: Auxins helps in preventing the premature falling of fruit and leaf at early stages.