Vegetative Propagation

Question 1

What is vegetative propagation ?

Answer 1

“Vegetative reproduction means asexual reproduction in plants”

In vegetative propagation becomes detached and grows to form a new plant

Plants produced from vegetative propaganda are genetically identical to parent plant

Question 2

What are the natural methods of vegetative propagation?

Answer 2

Stem

• runners are stems that grow over ground from parent plant.
• When far enough from parent plant it produces roots and stems to form a new plant. E.g. strawberrys, buttercups

Root

• some plants form root tubers. These are roots that swell up to store food
• The root tubers survive underground when parent plant dies off. Each tuber can produce new plant during following growing season

E.g dahilas and sweet potatoes

Question 3

What are the natural methods of vegetative propagation?

Answer 3

Stem

• runners are stems that grow over ground from parent plant.
• When far enough from parent plant it produces roots and stems to form a new plant. E.g. strawberrys, buttercups

Root

• some plants form root tubers. These are roots that swell up to store food
• The root tubers survive underground when parent plant dies off. Each tuber can produce new plant during following growing season

E.g dahilas and sweet potatoes

Leaf

• reproduce from leaves that fall into the the ground
• other plants produce many new plants along the edges of their leaves
• E.G mother of thousands

Bulbs

• bulbs contain many buds
• New plants can be formed from the buds that we located between the swollen,fleshy leaves of the bulb
• E.G onions, daffodils

Question 4

What are the artificial methods of vegetative reproduction ?

Answer 4

Cuttings

• A cutting is part of a shoot that is removed from the parent plant
• The cutting may be planted directly in the soil for roots to form
• E.G busy Lizzie and geraniums

Grafting

• involves attaching a section of one plant( called the scion ) into a cut in the second plant ( The stock)
• process is successful it the two growing regions (meristems) merge together

Layering

• Involves bending a long stem over so it can be attached to the soil
• New plant forms where the stem meets the soil

Micropropagation

• also called tissue culture
• cells are extracted from the parent plant and grown in a liquid culture or on an agar
• cells form a mass of undiffertiated cells called a callus
• in correct conditions each callus will form a new plant
• this method allows huge numbers of plants to be formed from one plant
• E.G orchids, bananas an potatoes-

Question 5

Compare sexual reproduction and vegetative reproduction

Answer 5

Sexual reproduction

Advantages:

       - Offspring show variations 
       - less composition due to dispersal 
       - variations allow for disease resistance 

Disadvantages

         - complex process 
         - Depends on external agents 
         - wasteful of flowering parts 

Vegetative Propagation

Advantages:

         - Offspring are identical 
         - simple process 
         - No external agents 

Disadvantages

         - No variations 
         - Danger of overcrowding 
         - all plants may be affected by same disease