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