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Objective 20.02 Discuss methods of asexual propagation using plants that are typically reproduced asexually.

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Presentation on theme: "Objective 20.02 Discuss methods of asexual propagation using plants that are typically reproduced asexually."— Presentation transcript:

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2 Objective 20.02 Discuss methods of asexual propagation using plants that are typically reproduced asexually

3 Propagation Increasing the number of a plant species or reproduction of a species

4 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

5 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

6 Methods of Asexual Propagation Cuttings are vegetative parts that the parent uses to regenerate itself Examples: –Leaf cuttings –Root cuttings –Stem cuttings

7 Methods of Asexual Propagation (Continued) Rooting hormone: a substance applied to cuttings to speed up the root development.

8 Layering a method where the stem is encouraged root while still attached to the parent plant Examples: –Simple layering –Tip layering –Air layering Methods of Asexual Propagation (Continued)

9 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.

10 Methods of Asexual Propagation (Continued) Division: by dividing or separating the main part of the plant into small parts Examples: –Day lilies

11 Methods of Asexual Propagation (Continued) Grafting: joining two plants together as they grow as one –T-budding is the most common type

12 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

13 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 Methods of Asexual Propagation (Continued)

14 Seeds Result of sexual reproduction Viable: a seed that is alive and capable of germination

15 That’s all folks…


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