During seed germination its stored food is mobilized [NEET 2013]a)Cytokininb)ABAc)Gibberellind)EthyleneCorrect answer is option 'C'. Can you explain this answer?

Question

Answer

Because gibberlin helps to growth of plants so the seed  germination is mobilized

Answer

Gibberellic acid was discovered as a metabolic byproduct of the fungus Gibberella fujikuroi, which causes the stems of growing rice to elongate so rapidly the plant collapsed. Synthetic forms of gibberellic acid are available commercially. Overcoming dormancy. Treatment with high concentrations of GA is effective in overcoming dormancy and causing rapid germination of seed. Concentrations of about 2 ppm can cause tubers to sprout earlier

Answer

Explanation:

During seed germination, the stored food in the seed is mobilized to provide energy and nutrients for the growing embryo. This process is regulated by various plant hormones, and in this case, the correct answer is option C, which is Gibberellin.

Gibberellin:
- Gibberellins are a group of plant hormones that play a crucial role in seed germination and seedling growth.
- They promote the breakdown of stored food reserves in the seed, such as starch and proteins, into simpler forms that can be used by the growing embryo.
- Gibberellins stimulate the production and secretion of enzymes, such as amylase and protease, which are responsible for the breakdown of complex molecules into smaller units.
- These enzymes break down starch into glucose molecules, which can be used as a source of energy for the growing embryo.
- Similarly, proteins are broken down into amino acids, which can be utilized for protein synthesis in the developing seedling.

Other plant hormones:
- Cytokinin: Cytokinins are involved in cell division and differentiation. They promote the growth of lateral buds and delay senescence in leaves. However, they do not directly influence the mobilization of stored food during seed germination.
- ABA (Abscisic Acid): ABA is a hormone that regulates seed dormancy and inhibits seed germination. It prevents the breakdown of stored food and keeps the seed in a dormant state until favorable conditions for germination are met. Therefore, ABA does not play a role in the mobilization of stored food during seed germination.
- Ethylene: Ethylene is involved in various aspects of plant growth and development, including fruit ripening and senescence. It does not have a direct role in the mobilization of stored food during seed germination.

Therefore, among the given options, the correct hormone that is involved in the mobilization of stored food during seed germination is Gibberellin (option C).

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