1. Vegetative reproduction
Bulbs, corms, stolons, rhizomes

2. Learning outcomes
Differentiate between sexual and asexual reproduction e.g. bulbs, corms, tubers, stolons and rhizomes
Question why this process differs from sexual reproduction

3. activity
In your group discuss what is vegetative reproduction
2mins

4. Vegetative reproduction
Vegetative reproduction entails growing a new plant from some part of the old plant.

5. Methods of vegetative production
Bulbs
Corms
Stolons
Rhizomes
tubers

6. bulbs
Bulbs consist of a stem with fleshy leaves attached to it in which food is stored.
Shoots and flowers develop from the main bud, and may develop from an axillary bud between the leaves.
If two buds develop in this way then each will form a bulb for the following year
Examples:
Narcissus, tulip and onion

8. Parts of a onion

9. corms
Similar to a bulb but is made up primarily of a short swollen stem in which the food is stored.
Shoots and flowers develop from the main bud, and may develop from an axillary bud between the leaves.
If two buds develop in this way then each will form a corm for the following year.
The new corm develops on top of the old one which eventually withers away
Examples:
Crocus and gladioli

11. Parts of a corm

12. stolons
a stolon is a stem that grows horizontally close to the ground and puts down roots from its nodes.
The new plant is fed through the stolon until it becomes self sufficient when the stolons will die.
Stolons are also called runners.
Examples:
Buttercups and strawberries

14. Parts of a stolon

15. rhizomes Similar to stolons Stems grow under the surface
Some are used to store food
Examples of non food storing:
Couch grass and nettle
Examples of food storing:
Iris and ginger

17. sTem tubers
Stem tubers are organs formed at the end of the rhizomes which store food over inter and develop into independent plants in the following year.
Examples:
Potatoes
artichokes

19. Root tubers
Root tubers are organs formed at the end of the roots which store food over the winter.
Examples:
dahlias