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Vegetative Reproduction or Vegetative Propagation - Natural Vegetative Propagation

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Estimated time: 15 minutes

CISCE: Class 12

Definition: Natural Vegetative Propagation

The process in which a new plant develops from a vegetative part (stem, root, or leaf) of the parent plant under suitable conditions is called natural vegetative propagation.

CISCE: Class 12

Type 1: Stem-based propagation

Stem is the most common vegetative organ involved in natural propagation. It may be underground, sub-aerial, or modified into other structures that carry buds capable of producing new plants.

A. Underground stems

Underground stems store food and bear buds that grow into new shoots under suitable conditions.

Structure	Main feature	Common examples
Rhizome	Horizontal underground stem with buds	Ginger, turmeric
Tuber	Swollen underground stem storing food; eyes are buds	Potato
Bulb	Short stem with fleshy scale leaves storing food	Onion, garlic
Corm	Short, vertical, swollen underground stem	Colocasia, gladiolus

A-D. Vegetative propagation by underground stems: A. rhizome; B. tuber; C. bulb; D. corm

B. Sub-aerial stems

Sub-aerial stems spread over or just below the ground and give rise to new plants at nodes or buds.

Structure	Main feature	Common examples
Runner	Slender stem running along the ground	Lawn grass, strawberry
Offset	Short, single-internode branch in aquatic plants	Pistia, water hyacinth
Sucker	Arises from underground basal part and grows upward	Mint, chrysanthemum
Stolon	Lateral branch that arches and touches the ground	Strawberry, jasmine

A-D. Vegetative propagation by sub-aerial stems: A. runner; B. offset; C. sucker; D. stolon

CISCE: Class 12

Type 2: Root-based propagation

In some plants, roots become swollen because of food storage and can produce adventitious buds that develop into new plants.

Structure	Main feature	Common examples
Tuberous/adventitious root	Food-storing root with capacity to produce buds	Sweet potato, dahlia

Sweet potato is a modified root, whereas potato is a stem tuber. This difference is a frequent examination trap.

Vegetative propagation by roots: adventitious buds on the tuberous root of sweet potato

CISCE: Class 12

Type 3: Leaf-based propagation

In a few plants, leaves bear adventitious buds at the margins or notches, and these buds develop into young plantlets.

Feature	Common examples
Buds arise on leaf margin and form plantlets	Bryophyllum, Begonia

A-C. Vegetative propagation by leaves: A. Bryophyllum; B. Kalanchoe; C. Begonia

CISCE: Class 12

Type 4: Bulbil-based propagation

Bulbils are modified buds that can detach from the parent plant and grow into a new individual. They act as specialised vegetative propagules.

Structure	Common examples	Meaning
Bulbil	Agave, Dioscorea	A detachable bud-like structure that grows into a new plant

Fig. 17 A-D. Vegetative propagation by bulbils: A. Globba; B. Dioscorea; C. Agave; D. Oxalis

CISCE: Class 12

Key Points: Natural Vegetative Propagation

Part Involved	Structure	Key Feature	Example
Underground stem	Rhizome / Tuber / Bulb / Corm	Modified stem with buds	Ginger, Potato, Onion, Colocasia
Sub-aerial stem	Runner / Offset / Sucker / Stolon	Creeping or branching stem	Doob grass, Water hyacinth, Mint, Strawberry
Root	Tuberous / Adventitious roots	Roots bear buds	Sweet potato, Dahlia
Leaf	Foliar buds	Buds on leaf margin or surface	Bryophyllum, Begonia
Special structure	Bulbil	Modified bud or flower	Agave, Dioscorea