Presentation on theme: "Objective 20.02 Discuss methods of asexual propagation using plants that are typically reproduced asexually."— Presentation transcript:
1 Objective 20.02Discuss methods of asexual propagation using plants that are typically reproduced asexually
2 PropagationIncreasing the number of a plant species or reproduction of a species
3 Sexual Propagation Use of seed for reproducing plants Only way to obtain new varietiesIncrease hybrid vigor of plantsLess expensiveQuicker than other methods
4 Asexual PropagationUse of a part or parts of a plant for reproducing plantsAlso called vegetative propagationThe new plant is an exact duplicate of the parent plant
5 Methods of Asexual Propagation Cuttings are vegetative parts that the parent uses to regenerate itselfExamples:Leaf cuttingsRoot cuttingsStem cuttings
6 Methods of Asexual Propagation (Continued) Rooting hormone: a substance applied to cuttings to speed up the root development.
7 Methods of Asexual Propagation (Continued) Layering a method where the stem is encouraged root while still attached to the parent plantExamples:Simple layeringTip layeringAir layering
8 Air layeringPropagation method where a stem is girdled, treated with a rooting hormone, and surrounded with damp sphagnum moss and plastic until new roots appear.
9 Methods of Asexual Propagation (Continued) Division: by dividing or separating the main part of the plant into small partsExamples:Day lilies
10 Methods of Asexual Propagation (Continued) Grafting: joining two plants together as they grow as oneT-budding is the most common type
11 Methods of Asexual Propagation (Continued) Root cutting: a type of cutting made when the plant is dormant and its roots have a reserve of carbohydratesCan harm parent plantExamples:RosesBlackberrieslilacs
12 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 plantsCloning is achieved by tissue culture
13 Seeds Result of sexual reproduction Viable: a seed that is alive and capable of germination