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Published byPhoebe Hortin Modified over 10 years ago
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Objective 20.02 Discuss methods of asexual propagation using plants that are typically reproduced asexually
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Propagation Increasing the number of a plant species or reproduction of a species
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Sexual Propagation Use of seed for reproducing plants
Only way to obtain new varieties Increase hybrid vigor of plants Less expensive Quicker than other methods
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Asexual Propagation Use of a part or parts of a plant for reproducing plants Also called vegetative propagation The new plant is an exact duplicate of the parent plant
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Methods of Asexual Propagation
Cuttings are vegetative parts that the parent uses to regenerate itself Examples: Leaf cuttings Root cuttings Stem cuttings
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Methods of Asexual Propagation (Continued)
Rooting hormone: a substance applied to cuttings to speed up the root development.
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Methods of Asexual Propagation (Continued)
Layering a method where the stem is encouraged root while still attached to the parent plant Examples: Simple layering Tip layering Air layering
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Air layering Propagation method where a stem is girdled, treated with a rooting hormone, and surrounded with damp sphagnum moss and plastic until new roots appear.
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Methods of Asexual Propagation (Continued)
Division: by dividing or separating the main part of the plant into small parts Examples: Day lilies
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Methods of Asexual Propagation (Continued)
Grafting: joining two plants together as they grow as one T-budding is the most common type
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Methods of Asexual Propagation (Continued)
Root cutting: a type of cutting made when the plant is dormant and its roots have a reserve of carbohydrates Can harm parent plant Examples: Roses Blackberries lilacs
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Methods of Asexual Propagation (Continued)
Tissue culture or micropropagations: the use of very small and actively growing parts of the plant to produce a high number of new plants Cloning is achieved by tissue culture
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Seeds Result of sexual reproduction
Viable: a seed that is alive and capable of germination
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That’s all folks…
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