Vegetative Propagation Flashcards Preview

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Flashcards in Vegetative Propagation Deck (5)
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1
Q

What is vegetative propagation ?

A

“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

2
Q

What are the natural methods of vegetative propagation?

A

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

3
Q

What are the natural methods of vegetative propagation?

A

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
4
Q

What are the artificial methods of vegetative reproduction ?

A

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-
5
Q

Compare sexual reproduction and vegetative reproduction

A

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