Post on 01-Apr-2015
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Plant Propagation by Cuttings
a. Kinds of cuttings 1) Stem cuttings
2) Leaf-bud cutting (single-eye)3) Root cuttings4) 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
• 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 Temp60 oF
Root zone Temp70 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
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
Single Node Cuttings
Double Eye (DE) Single Eye (SE)
5-node
Regular Cuttings
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 StandsPima 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 FieldBakersfield, 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