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प्रश्न
Very Short Answer Question:
What is role of gibberellin in rosette plants?
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उत्तर
Gibberellin promotes bolting i.e. elongation of internodes just prior to flowering in plants with rosette habit e.g. beet, cabbage.
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संबंधित प्रश्न
Match the items in column A with those of column B.
| Column A | Column B | ||
| (a) | Auxin | (i) | apical dominance |
| (b) | Gibberellin | (ii) | cell-division |
| (c) | Cytokinin | (iii) | fruit ripening |
| (d) | Ethylene | (iv) | internodal elongation |
The tea plants are never allowed to grow lengthwise. This is done by cutting their apical buds, a process known as pruning. In this way, tea plants get a dense growth and easy yield. Answer the following questions:
- Name the scientific phenomenon that is being overcome by pruning.
- What plant hormone is responsible for the scientific phenomenon mentioned in (a)?
- Name one plant hormone which inhibits the said phenomenon.
Answer the following question.
What are plant hormones? Name the plant hormones responsible for the following:
- Growth of stem
- Promotion of cell division
- Inhibition of growth
- Elongation of cells
Buyers often complain that a particular fruit merchant uses some chemical to ripen fruits in his shop.
Name the chemical he must be using to do so.
Name the tissue that transports hormones within the plant body?
Write full form of 2,4-D
Which hormone causes Bakanae disease of rice?
The only phytohormone which is a gas at ordinary temperature:
The response by parts of the plant towards stimulus is called as ______.
The box given below contains twelve words. Out of these, ten can be arranged in five suitable matching pairs. Make these five pairs in the form of a table.
| Auxins, Abscisic acid, Fruit ripening, Cytokinins, Closure of stomata, Parthenocarpy, Ethylene, Gibberellins, Tropism, Stem elongation, Cuscuta, Cell division. |
