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प्रश्न
The figure given below shows the stages of ripening in a banana. Answer the questions that follow:
- Name the plant hormone responsible for the above changes.
- Mention two characteristic features of this hormone.
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उत्तर
- Ethylene is the hormone responsible for the above changes. At ordinary temperatures, ethylene is a gas; it helps in the ripening of bananas when stored together.
- Characteristic features of ethylene:
- It is synthesised in senescent leaves and flowers, germinating seeds and ripening fruits.
- It promotes root growth and root hair formation and it also induces and promotes fruit ripening.
APPEARS IN
संबंधित प्रश्न
Ethylene retards the senescence of leaves, flowers, and fruits.
Name the gaseous plant hormone. Describe its three different actions in plants.
In which of the following cases ethylene (gaseous phytohormone) synthesized in large amounts by tissues?
- Ripening of fruits
- Senescence
- Cell division promoting activity
- Actively growing apices of stems and roots.
Which hormone is produced mostly in all parts of a plant?
Which phytohormones is called secondary hormone?
Describe physiological effects and applications of gaseous hormones in plants.
A farmer grows cucumber plants in his field. He wants to increase the number of female flowers in them. Which plant growth regulation can be applied to achieve this?
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 |
What is epinasty?
The hormone which promotes the ripening of fruits is ______.
