Asexual Propagation Done by My Prof.
1/3/2013
God and plant propagation
Asexual/vegetative propagation
(Essential skills in nursery management)
• " 'This is what the Sovereign LORD says: I myself will take a shoot from the very top of a cedar and plant it; I will break off a tender sprig from its topmost shoots and plant it on a high and lofty mountain. 23 On the mountain heights of Israel I will plant it; it will produce branches and bear fruit and become a splendid cedar.” (Ezekiel 17)
Why use asexual propagation?
• • • • • • • • Uniformity Propagate non-seed producing plants Avoid seedborne diseases To create insect or disease resistant plants To incorporate environmental tolerances To reproduce and retain the genetic traits of a hybrid Control size and form of a plant Can be faster and easier, cheaper
Disadvantages of asexual propagation
• • • • Uniformity Short storage time Bulky Systemic infections can be spread • • • • •
Types of asexual propagation
Specialized parts Cuttings Layering Grafting Tissue culture
1
1/3/2013
Specialized plant parts
• Offshoots • Separation • Division
Division
Division - rhizomes
Division of rhizomes
Division
Division
2
1/3/2013
Division – fleshy roots
Division – tuberous roots
Separation
• Bulbs • Corms
Separation – bulbs
3
1/3/2013
Separation – bulbs
Separation - bulbs
• Amaryllis (a tunicate bulb)
Scooping bulbs
Separation – scaly bulbs
4
1/3/2013
Separation - corms
• Herbaceous • Woody plants
Cuttings
– Softwood – Semi-hardwood (ripe) – Hardwood
Cuttings
• Herbaceous
– – – – Stem Stem tip Leaf bud Leaf
Leaf cuttings
Whole leaf cuttings
5
1/3/2013
Leaf cuttings
Keep moist at all times
Leaf cuttings
Cuttings from variegated plants
6
1/3/2013
Roots tend to develop at nodes
Cuttings
• Softwood – late spring, new growth • Semi-hardwood (ripe) – summer, recent growth • Hardwood – late fall (dormant), 1 yr. growth
God and plant propagation
Asexual/vegetative propagation
(Essential skills in nursery management)
• " 'This is what the Sovereign LORD says: I myself will take a shoot from the very top of a cedar and plant it; I will break off a tender sprig from its topmost shoots and plant it on a high and lofty mountain. 23 On the mountain heights of Israel I will plant it; it will produce branches and bear fruit and become a splendid cedar.” (Ezekiel 17)
Why use asexual propagation?
• • • • • • • • Uniformity Propagate non-seed producing plants Avoid seedborne diseases To create insect or disease resistant plants To incorporate environmental tolerances To reproduce and retain the genetic traits of a hybrid Control size and form of a plant Can be faster and easier, cheaper
Disadvantages of asexual propagation
• • • • Uniformity Short storage time Bulky Systemic infections can be spread • • • • •
Types of asexual propagation
Specialized parts Cuttings Layering Grafting Tissue culture
1
1/3/2013
Specialized plant parts
• Offshoots • Separation • Division
Division
Division - rhizomes
Division of rhizomes
Division
Division
2
1/3/2013
Division – fleshy roots
Division – tuberous roots
Separation
• Bulbs • Corms
Separation – bulbs
3
1/3/2013
Separation – bulbs
Separation - bulbs
• Amaryllis (a tunicate bulb)
Scooping bulbs
Separation – scaly bulbs
4
1/3/2013
Separation - corms
• Herbaceous • Woody plants
Cuttings
– Softwood – Semi-hardwood (ripe) – Hardwood
Cuttings
• Herbaceous
– – – – Stem Stem tip Leaf bud Leaf
Leaf cuttings
Whole leaf cuttings
5
1/3/2013
Leaf cuttings
Keep moist at all times
Leaf cuttings
Cuttings from variegated plants
6
1/3/2013
Roots tend to develop at nodes
Cuttings
• Softwood – late spring, new growth • Semi-hardwood (ripe) – summer, recent growth • Hardwood – late fall (dormant), 1 yr. growth