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Vegetative Propagation

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Lia .

on 29 September 2013

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Transcript of Vegetative Propagation

Artificial means of Vegetative Propagation
Vegetative Reproduction By Stem
In stems, instead of producing a branch, the bud grows into a complete plant which eventually becomes self-supporting. Vegetative reproduction by various kinds of stems are as follows.
Vegetative Propagation by Leaves
Leaves of some plants will grow into a new plant if they become detached from the parent plant. Other plants grow small plants called plantlets on the edge of their leaves.
By Bulbils
In plants such as certain varieties of pineapple, some of the upper and lower flowers of the inflorescence instead of developing into fruit and seeds become modified into small tufts called bulbils. These fall on the ground and grow into new plants.
Vegetative Propagation
Vegetative propagation is an asexual method of reproduction. In vegetative propagation, new plants are obtained from the parts of old plants (
like stems, roots and leaves
), without the help of any reproductive organs.

Vegetative propagation usually involves the growth and development of one (or more) buds present on the old part of the plant to form a new plant. These buds are in the
state in the old part of the plant, and when provided suitable conditions (like moisture, warmth, etc.), they grow to form new plants.

In the asexual reproduction method, certain body cells of the parent organism undergo repeated mitotic cell divisions to form two (or more) new organisms of the same kind. Asexual reproduction takes place by six different methods. These are:
1. Fission
2. Budding
3. Spore formation
4. Fragmentation
5. Regeneration
6. Vegetative propagation
Vegetative Propagation by Roots
Roots of some plants develop new plants either by directly producing shoots or producing buds.

Shoots are produced by roots of woody plants like Dalbergia, Murraya etc.
Adventitious buds are formed on the roots of plants like
sweet potato
dahlia, asparagus, tapioca
, etc. These buds detach from the root and develop into new plants.
They are seen in common lawn grass. These are horizontal stems running horizontally parallel to the ground. The inter- nodes are long. New roots develop at the nodes. The axillary buds at the nodes grow upward to form new shoots, thus forming a sort of new plant.
Stem Tuber
Tuber of potato is a swollen apical part of an underground stem branch & bears number
of nodes or eyes. Each eye bear one or many buds. New plants are produced from the buds present on the eye.
Bulbs are found in onion, lily, tulip, etc.
A bulb is a thick, short, underground stem in the form of a disc, which bears overlapping scale leaves containing food.
The terminal bud grows into a green aerial shoot under suitable conditions
Suckers of mint and Chrysanthemum are somewhat similar to runners but with shorter inter-nodes
A rhizome is a horizontal stem that is usually found underground. Rhizomes have nodes & short inter-nodes; send out roots from the bottom & shoots from the top of the nodes.
Seen in
Corm is a condensed form of rhizome which is formed vertically in the ground.
Sometimes a single corm may also develop secondary or daughter corms as in colocasia, gladiolus, Amorpho phallus
Cuttings are part of the plant that is cut off of the parent plant. Shoots with leaves attached are usually used. New roots and leaves will grow from the cutting. The shoot is cut at an angle. A growth promoter may be used to help with the growth of the roots.
In layering a shoot of a parent plant is bent until it can be covered by soil. The tip of the shoot remains above ground. New roots and eventually a new plant will grow. These plants can then be separated.
In grafting 2 plants are used to develop a new plant with combined traits from the 2 parent plants. In grafting the scion is the above ground part of one plant. The scion is attached to the stock which is the rooted part of the second plant.
Assessment time!
Word Grid
Identify the plant parts used in vegetative propagation
Identify and Explain the type of propagation
{Video to be muted}
Full transcript