GREENHOUSE MANAGEMENT Asexual Propagation. Objectives Define terms associated with asexual...
-
Upload
erica-hensley -
Category
Documents
-
view
212 -
download
0
Transcript of GREENHOUSE MANAGEMENT Asexual Propagation. Objectives Define terms associated with asexual...
GREENHOUSE MANAGEMENT
Asexual Propagation
Objectives
Define terms associated with asexual propagation.
Explain how the different methods of asexual propagation are performed.
Demonstrate the correct procedure of asexual propagation by using cuttings.
Terms
Air layeringAsexual propagationCloningCrownCuttingDisinfectantDivisionGirdlingGrafting
Growth regulatorLayering Leaf bud cuttingRoot cuttingStem cuttingStock plantTissue culturevegetative
Terms
Crown- part of the plant that enters the soilDisinfectant- a material that destroys
infective agents such as bacteria and virusesGirdling- wounding; restricts the function of
the xylem or phloem of a dicot plantGrowth regulator- a substance that
influences plant growth
Asexual Propagation
Process of reproducing plants without seedsUses the leaves, buds, stems, and roots of
plants to produce new plantsAlso called vegetative
Cuttings
Cutting- vegetative plant part that regenerates roots and forms new plants
Stock plants- a plant from which cuttings are taken
Can be made from portions of stems, leaves, or roots
Stem Cutting
Cut portion of a stem that contains a terminal bud of lateral buds and is placed in growing media to produce roots
Leaf Cutting
Consists of a leaf blade or leaf blade with petiole attached
Leaf blade new plant forms at the point where the veins are cut
Leaf blade with petiole Roots will form at the end of the petiole; new shoots
will emerge at the base of the petiole
Leaf Bud Cutting
A cutting that includes a short section of stem with a leaf attached
Stem is treated with rooting hormone and inserted into the growing medium with the lateral bud just below the medium surface
New plant will develop from the lateral bud
Root Cutting
A cutting made from sections of roots
Separation
Some plants produce vegetative plant structures that can be removed intact from the parent plant.
Removal and planting of these vegetative structures is separation.
Division
Involves separation of a plant into two or more pieces, each containing a portion of the roots and crown
The plant roots or the entire plant may be cut into sections to make two or more plants from the original plant.
Layering
Roots form on the stem of the plant while it is still attached to the parent plant
Parent plan supports the new plant during root development
Once the new plant can function on its own, it is removed from the parent.
Air layering
Stem is girdled, the cut is dusted in rooting hormones, and the dusted cut is covered in moss
Types of Layering
Simple layeringTrench layeringMound layeringAir layering
Grafting
Implanting a branch or bud from one plant onto another
Tissue Culture
Plant reproduction using very small, actively growing plant parts under sterile conditions and medium
Cloning- genetically engineering offspring from nonsexual tissue