Download Cutting - Block2012

Asexual Propagation
GREENHOUSE MANAGEMENT
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 layering
 Growth regulator
 Asexual propagation
 Layering
 Cloning
 Leaf bud cutting
 Crown
 Root cutting
 Cutting
 Stem cutting
 Disinfectant
 Stock plant
 Division
 Tissue culture
 Girdling
 vegetative
 Grafting
Terms
 Crown- part of the plant that enters the soil
 Disinfectant- a material that destroys infective
agents such as bacteria and viruses
 Girdling- wounding; restricts the function of the
xylem or phloem of a dicot plant
 Growth regulator- a substance that influences
plant growth
Asexual Propagation
 Process of reproducing plants without seeds
 Uses the leaves, buds, stems, and roots of plants to
produce new plants
 Also 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 layering
 Trench layering
 Mound layering
 Air 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