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Question
Which of the following statements regarding ethylene is/are correct?
I. Ethylene influences the growth of seeds and seedlings.
II. It helps in breaking the dormancy of seeds.
III. It promotes the formation of apical hook in dicots, germination and horizontal growth of seedlings.
Which of the following statements regarding ethylene is/are correct?
I. Ethylene influences the growth of seeds and seedlings.
II. It helps in breaking the dormancy of seeds.
III. It promotes the formation of apical hook in dicots, germination and horizontal growth of seedlings.
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Solution
The correct option is A I, II and III are correct
Ethylene plays several roles in the growth of seeds and seedlings. It breaks seed dormancy and makes the seed ready for germination. It also stimulates germination along with gibberellin in some seeds, e.g., peanut. Ethylene also promotes the seedling's horizontal growth and causes an increase in the girth of the seedling. In dicot seedlings, the tip of the shoot is usually bent like a hook. The hook prevents damage to the growing tip when it is trying to push upwards through the soil. Ethylene promotes the development of the apical hook in seeds and seedlings.
Ethylene plays several roles in the growth of seeds and seedlings. It breaks seed dormancy and makes the seed ready for germination. It also stimulates germination along with gibberellin in some seeds, e.g., peanut. Ethylene also promotes the seedling's horizontal growth and causes an increase in the girth of the seedling. In dicot seedlings, the tip of the shoot is usually bent like a hook. The hook prevents damage to the growing tip when it is trying to push upwards through the soil. Ethylene promotes the development of the apical hook in seeds and seedlings.
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