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प्रश्न
Write a short note on rhizome.
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उत्तर
- Rhizome is a modification of underground stem for storage of food.
- It is prostrate, dorsiventrally thickened and brownish in colour.
- It grows either horizontally or obliquely beneath the soil.
- Rhizome shows nodes and internodes. It bears terminal and axillary buds at nodes.
- Terminal bud under favourable conditions produces aerial shoot which degenerates at the end of favourable condition.
- Growth of rhizome takes place with lateral buds, such growth is known as sympodial growth. e.g. Ginger (Zingiber officinale), Turmeric (Curcuma domestica), Canna etc.
- In plants where rhizomes grow obliquely, terminal bud brings about growth of rhizomes. This is known as monopodial growth. e.g. Nymphea, Nelumbo (Lotus), Pteris (Fern) etc.
- Rhizomes perform functions like storage of food, vegetative propagation and perennation.
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संबंधित प्रश्न
Write a short note on Racemose inflorescence.
Write a short note on Cymose inflorescence.
Write a short note on Perianth.
Students were on an excursion to a botanical garden. They noted the following observation. Will you be able to help them in understanding those conditions?
A wiry outgrowth was seen on a plant arising from in between the leaf and stem.
Students were on an excursion to a botanical garden. They noted the following observation. Will you be able to help them in understanding those conditions?
There was a green plant with flat stem, but no leaves. The entire plant was covered by soft spines.
Students were on an excursion to a botanical garden. They noted the following observation. Will you be able to help them in understanding those condition?
Many oblique roots were given out from the lower nodes, apparently for extra support.
Students were on an excursion to a botanical garden. They noted the following observation. Will you be able to help them in understanding those condition?
A plant was found growing on other plant. Teacher said it is not a parasite. It exhibited two types of roots.
Match the following.
| 'Group A' | 'Group B' |
|
1. |
A. Marginal |
2.  |
B. Basal |
3.  |
C. Axile |
4.  |
D. Free central |
5.  |
E. Parietal |
Differentiate with diagrammatic representation: Racemose and cymose inflorescence.
Differentiate with a diagrammatic representation Tap root and Adventitious roots.
