Types of Asexual Propagation - Horticulture - Lecture Slides, Slides for Biology. Bidhan Chandra Krishi Viswa Vidyalaya

Biology

Description: These are the lecture slides of Horticulture and key important points are: Types of Asexual Propagation, Tissue Culture, Grafting, Parts of Graft, Single Composite Plant, Influence Winter Hardiness, Success of Grafts Depends, Vascular Cambium, Graft Union Formation
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Major types of asexual propagation:
Division
Cuttings
Layering
Grafting
Budding
Micropropagation (tissue culture)
Monday
Today
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Grafting = joining together of plant parts so they
grow as a single composite plant
Asexual propagation
Two parts of graft
Scion = short piece of stem with several dormant buds
Stock = lower portion (stem and/or roots of another plant)
Stock chosen because:
»Control size of overall plant
Scion generally from the desired cultivar
»Influence the time to fruit maturity
»Influence winter hardiness
»Offer disease or stress resistance
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Success of grafts depends on:
Asexual propagation
Correct seasonal timing of graft
Maintaining high humidity at graft union
Selecting closely related plants to graft
Lining up vascular cambium of scion with vascular
cambium of stock
Requires ‘clean’ cut of scion and stock
Grafting cannot be done with monocots because they
have scattered, rather than regular vascular bundles
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Success of grafts depends on contact between
vascular cambiums of scion and stock
Asexual propagation
vascular cambium = layer between bark and inner wood of
dicot stem
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