During seed germination its stored food is mobilized by : (1) Gibberellin (3) Cytokinin (2) Ethylene (4) ABA?

Question

Answer

Gibberelline is the correct answer as it promotes aleurona cells to produce enzymes which breakdown and mobilize the food stored in leaf.

Answer

Gibberellin is a plant hormone that is involved in various physiological processes of plant. It causes stem elongation, flowering, germination. During seed germination, it promotes aleurone cells to secrete enzyme which breakdowns and mobilizes food stored in seed.

Answer

During seed germinatuon it's stored food is mobilised by Gibberellin .As it helps in regulating growth and flowering in plants. It also helps in elongation of cells in plants which causes increase in soot ghrowth.

Answer

During seed germination, the stored food is mobilized by various plant hormones:

Gibberellin:
- Gibberellins are plant hormones that promote seed germination and seedling growth.
- They stimulate the synthesis of enzymes called amylases, which break down the stored starch in the endosperm into simple sugars.
- These simple sugars can then be transported to the growing embryo for energy and growth.

Cytokinin:
- Cytokinins are plant hormones that play a role in cell division and growth.
- During seed germination, cytokinins help in the mobilization of the stored food by promoting the growth and development of the embryo.
- They stimulate the synthesis of enzymes that break down proteins and nucleic acids into amino acids, which can be used for protein synthesis and growth.

Ethylene:
- Ethylene is a plant hormone that is involved in various physiological processes, including seed germination.
- It promotes the breakdown of stored lipids in the endosperm, releasing fatty acids that can be used as an energy source for germination.
- Ethylene also helps in the elongation of the embryonic axis, enabling the seedling to emerge from the soil.

ABA (Abscisic Acid):
- ABA is a plant hormone that plays a role in seed dormancy and inhibits seed germination under unfavorable conditions.
- It prevents the mobilization of stored food by inhibiting the synthesis of enzymes involved in the breakdown of starch and proteins.
- ABA also promotes the synthesis of storage proteins, which helps in maintaining the viability of the seed during dormancy.

Conclusion:
During seed germination, the stored food is mobilized through the action of various plant hormones. Gibberellins stimulate the breakdown of starch into simple sugars, cytokinins promote the breakdown of proteins and nucleic acids into amino acids, ethylene facilitates the breakdown of lipids into fatty acids, and ABA regulates the overall process by inhibiting or promoting the synthesis of enzymes involved in food mobilization. These hormonal actions ensure the availability of energy and nutrients for the growth and development of the germinating seed.

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