Write a short note on rhizome.

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Answer in Brief

Solution

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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Evidences of organic evolution > Morphology

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Q 3. (E)Q 3. (iv)Q 3. (F)

Chapter 9: Morphology of Flowering Plants - Exercise [Page 114]

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Balbharati Biology [English] Standard 11 Maharashtra State Board

Chapter 9 Morphology of Flowering Plants
Exercise | Q 3. (E) | Page 114

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