Question

Fruit drop is prevented by spraying

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

Answer 1

The correct option is D

Auxin

The correct option is D.

Explanation for correct option:

1. Fruit drop is the detachment of fruit from a tree and is caused by the formation of a layer of cells on the fruit stalk due to a series of biochemical events.
2. The substances binding the cells dissolve and cause the cells to separate from each other.
3. Fruit drop occurs when the auxin levels go down and thus it can be prevented by the application of auxin.
4. Auxin helps keep the fruit intact and prevents early fruit drops from trees.

Explanation for incorrect options:

Option A:

1. Cytokinin is a plant growth hormone that promotes cell division and cell expansion during proliferation.
2. During leaf senescence, it reduces the accumulation of sugars and boosts chlorophyll synthesis.

Option B:

1. Gibberellin is a plant hormone involved in the regulation of plant developmental processes such as stem elongation, germination, dormancy, and flowering.
2. It also plays a crucial role in fruit ripening and flowering.

Option C:

1. Ethylene is a multifunctional plant hormone that regulates plant growth and senescence.
2. It is employed to boost fruit ripening and produce flower and fruit production.

Final answer: Fruit drop is prevented by spraying auxin.