Question

One of the commonly used plant growth hormones in tea plantations is?

• A. Zeatin
• B. Abscisic acid
• C. Ethylene
• D. Indole – 3 – acetic acid

Answer 1

The correct option is D

Indole – 3 – acetic acid

The correct option is D:

Explanation for Correct option:

1. The most common auxin-class phytohormone, indole-3-acetic acid (IAA), is involved in plant growth and development activities such as cell division, cell expansion, cell differentiation, and fruit production.
2. It is the most well-known of the auxins, and plant physiologists have studied it extensively.

Explanation for Incorrect options:

Option A:

1. Zeatin is a cytokinin-related plant growth hormone.
2. It is made composed of a purine ring structure with hydroxyl, amino, and olefin groups on the side chain.
3. It was identified in the maize genus Zea, and is named after it.
4. The root systems of plants produce zeatin and other cytokinin.

Option B:

1. Abscisic acid is a stress-inhibiting hormone that aids plant adaptation.
2. It also keeps the water balance in the plant, inhibits seed embryos from developing, and causes seed and bud dormancy.

Option C:

1. Ethylene is best known for its effects on fruit ripening and organ abscission, making it a valuable commodity in agriculture.
2. It's utilized to help with pollination and root growth.

Final answer: One of the commonly used plant growth hormones in tea plantations is Indole – 3 – acetic acid.