Transcript Chap 9. Principles of Propagation by Cuttings

Plant Propagation by Cuttings
a. Kinds of cuttings
1) Stem cuttings
2) Leaf-bud cutting (single-eye)
3) Root cuttings
4) Leaf cuttings
b. Totipotency-The ability of an individual cell
to reconstitute the entire plant part and
functions
c. Dedifferentiation-The capability of
previously developed, differentiated cell to
return to a meristem
Plant Propagation by Cuttings
1. Stem cuttings
2. Leaf-bud cutting (single-eye)
3. Root cuttings
4. Leaf cuttings
1. Stem Cuttings
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Softwood Cuttings
Semi-Hardwood Cutting
Hardwood Cuttings
Herbaceous Cuttings
Softwood Cuttings
Shoftwood Cuttings - Hydrangea
Butterfly cutting (top)
Double-eye single node cutting (middle)
Single-eye single node cuttings (bottom)
Softwood Cuttings-Peach
- Actively growing shoots are
used
- Softwood cuttings are taken
during spring and summer
Influence of IBA on Semi-Hardwood Cuttings - Cordia
1-Control, 2-50% ethanol, 3-100 ppm, 4-1000 ppm, 5-2000 ppm, 6-4000 ppm,
7-6000 ppm, 8-8000 ppm, 9-10000 ppm IBA
Semi-Hardwood Cuttings - Jojoba
Treating cuttings in
IBA Solution (top)
Sticking IBA-treated
cuttings in root
substrate (bottom)
Bottom Heat System for Cutting Benches
Temperature Differential Helpful for Root Formation
Ambient Temp
60 oF
- Rooting requires
carbohydrates
(energy), auxin
(growth hormone),
and rooting
cofactors (enzymes)
- Temperature
differential (10 oF)
between the
ambient air and root
zone is helpful for
faster rooting
Root zone Temp
70 oF
Good sanitation is important
Cutting on the left was
infected with Alternaria
and did not root
Cutting on the right was
healthy and rooted well
Cutting Propagation in Jojoba
• Regular Stem Cuttings
– Use 4-5 nodes
– Semi-hardwood cuttings
• Single Node Cuttings
– Double-eye single node
cuttings
– Single-eye single node
cuttings
Rooting of 3 Different Types of Cuttings in Jojoba
Regular Cuttings
Single Node Cuttings
Double Eye (DE)
5-node
Single Eye (SE)
Single Node Cuttings
Double-Eye Single Node
Cutting (DE)
- Healthier than SE
- Less disease attacks
Single-Eye Single Node
Cutting (SE)
- Largest no. cuttings/plant
- Slower development
- Higher mortality
Clonal Selection of Jojoba from Native Stands
Pima Canyon, Tucson, AZ
Clonal Selection from Cultivated Field
Rooting jojoba cuttings in bundles with a bottom heat system
Jojob Cutting Propagation House
High Pressure Fogging
(1000 psi pressure)
Cuttings rooted under high-pressure fogging
Use of Plant Bands for Rooting
Hardening of rooted cuttings under a shade house
Clonally Propagated Jojoba Field
Bakersfield, CA
An orchard of clonally propagated citrus plants, Bakersfield, CA
Commercial Cutting Operation
Bagged Cuttings are Stored in Cold
Trimming Cuttings
Trimming Cuttings
Growth Regulator (IBA) Treatment on Cuttages
Rooting Cuttings of Pacific Yew
Outdoor Rooting Facility-Monrovia Nursery
Herbaceous Cuttings-Chrysanthemum
Herbaceous Cuttings
Carnation Cutting Harvest
Steam Sterilizing Beds
pH Adjustment of Carnation Beds
Planting Rooted Cuttings
Typical Carnation Benches
Poinsettia Plant Grown in Mexico
Commercial Propagation of Poinsettia
Paul Ecke, Sr. – Developer
of modern day poinsettias
Herbaceous Cuttings-Poinsettia
Leaf Cuttings-African Violet, Piggyback Plant