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प्रश्न
Describe physiological effects and applications of gaseous hormones in plants.
Describe physiological effects and applications of ethylene.
उत्तर
Ethylene is the gaseous hormone. Its applications and physiological effects are as follows:
- It promotes the ripening of fruits like bananas, apples and mangoes.
- It stimulates the initiation of lateral roots in plants and breaks the dormancy of bud and seed.
- It accelerates the abscission activity in leaves, flowers and fruits by forming of abscission layer.
- Ethylene inhibits the growth of lateral buds and causes apical dominance and retards flowering.
- It is associated with the enhancement of the process of senescence of plant organs.
- It inhibits flowering in most plants except pineapple.
- It causes epinasty (drooping) of leaves and flowers.
- It increases the activity of chlorophyllase enzyme causing degreening effect in banana and Citrus fruits.
संबंधित प्रश्न
Ethylene retards the senescence of leaves, flowers, and fruits.
What would be expected to happen if A rotten fruit gets mixed with unripe fruits?
Compound which is most widely used as a source of ethylene is ____________.
Synthesis of ethylene takes place in ______
Which hormone is responsible for fruit ripening?
Ethylene is synthesised in ______.
Which of the following is the only gaseous plant growth regulator?
Explain the role of chlorophyllase enzyme in banana.
Pick up the right options and complete the chart given below and rewrite:
(Options: Antitranspirant, Ethylene, Auxin, ABA, Apical dominance, Gibberellins, Cytokinin, NAA.)
| Sr. No. | Hormone | Example | Function |
| 1 | ____________ | IAA | Cell elongation |
| 2 | Auxin | IBA | ____________ |
| 3 | Stress hormone | ____________ | Delay cell division |
| 4 | ____________ | Zea tin | Cell division |
| 5 | Abscissic acid | ABA | ____________ |
| 6 | Auxin | ____________ | Flowering in pineapple |
Name the following:
A gaseous plant hormone which promotes the ripening of fruits.
