Question

Name the plant growth regulators which upon spraying on sugarcane crops increase the length of the stem, thus increasing the yield of sugarcane crops?

• A. Ethylene
• B. Abscisic acid
• C. Cytokinin
• D. Gibberellin

Answer 1

The correct option is D

Gibberellin

The correct option is D.

Explanation of correct option:

1. Gibberellin is sprayed on sugarcane stems to boost yield by lengthening them.
2. They aid in the slowing of fruit senescence.
3. They promote elongation and improve the appearance of fruits.

Explanation of incorrect option:

Option A:

1. Ethylene is a basic, gaseous plant growth regulator produced by the majority of plant organs, including ripening fruits and aged tissues.

Option B:

1. Abscisic acid is also known as the stress hormone since it assists in building plant tolerance to various types of stress.

Option C:

1. Cytokinins are primarily produced in the roots and shoots, where cell division occurs.
2. They aid in the production of new leaves, lateral branch growth, and the formation of chloroplasts in leaves, among other things.

Final answer: Gibberellins are sprayed on sugarcane stems to increase the yield.