Question

During seed germination, its stored food is mobilized by

• A. gibberellin
• B. ABA
• C. cytokinin
• D. ethylene

Answer 1

The correct option is A

gibberellin

The correct option is A.

Explanation for the correct option:

1. Gibberellins promote the amylase synthesis in aleurone cells.
2. The enzyme amylase hydrolyzes the significant food reserve found in many seeds, starch.
3. Gibberellins work to break the dormant state of the seed and mobilize its food stores, which may then be used to feed the seed embryos.

Explanation for the incorrect options:

Option B:

1. Abscisic acid is a plant hormone.
2. The regulation of organ growth, bud and seed dormancy, stomatal closure, and other developmental processes in plants all involve ABA.

Option C:

1. In the roots and shoot systems of plants, cytokinins, a group of growth regulators, are crucial for cell division.
2. The development, differentiation, apical dominance, and delay of leaf senescence are all supported by this hormone.

Option D:

1. It is believed that the multipurpose phytohormone ethylene regulates both growth and senescence.
2. It either promotes or inhibits the processes of growth and senescence depending on the concentration, time, and species of the plant.

Final answer: During seed germination, its stored food is mobilized by gibberellin.