Question

The combination of hormones that can induce flowering in pineapple plants is

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

Answer 1

The correct option is B

Auxin and Ethylene

The correct option is B.

Explanation of the Correct option:

1. Acetic acid from naphthalene, NAA is a manufactured synthetic auxin.
2. Any member of the group of plant hormones known as auxin controls growth, especially by promoting stem cell elongation.
3. It promotes pineapple blossom.
4. Another auxin that aids in encouraging root development in plant cuttings from the parent plant is IBA.
5. Ethylene also encourages flowering and synchronizes fruit set in pineapples.
6. A class of plant growth regulators known as ethylene is frequently employed to speed up the ripening of fruits and increase the number of blossoms and fruits that are produced.

Explanation of the Incorrect option:

Option A:

1. A group of plant hormones known as cytokinins encourages cytokinesis, or cell division, in the roots and shoots of plants.
2. A plant hormone is called abscisic acid.
3. ABA plays a role in a variety of developmental processes in plants, such as bud and seed dormancy, organ size regulation, and stomatal closure.

Option C:

1. Gibberellins are growth regulators for plants that promote cell elongation and increase plant height.
2. They also have a significant impact on blooming, fruit ripening, stem elongation, and germination.
3. The production of grapes has arguably seen the widest application.
4. A group of plant hormones known as cytokinins encourages cytokinesis, or cell division, in the roots and shoots of plants.

Option D:

1. Gibberellins are growth regulators for plants that promote cell elongation and increase plant height.
2. ABA plays a role in a variety of developmental processes in plants, such as bud and seed dormancy, organ size regulation, and stomatal closure.

Final answer:
The combination of hormones that can induce flowering in pineapple plants is auxin and ethylene.