Seed Dormancy

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Seed Dormancy
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Seed Dormancy
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Seed Dormancy
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Seed Dormancy
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Asexual or Vegetative Propagation
vegetative reproduction, i.e., multiplication
that does not involve the seed cycle - clonal
propagation.

• cuttings
• layering air layering
• Grafting and budding
• specialized structures
• tissue culture micropropagation

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Asexual or Vegetative Propagation
totipotency - the concept that every cell in a
plant has the inherent genetic
ability to reproduce the entire plant. 
Advantages 1) All off-spring are true-to-type
(identical to the parent) and produce a clone . 
    clone - a group of plants, cultivar or
variety derived from the same parent
plant by asexual (vegetative) propagation. 
2) for plants that are hard or impossible to
propagate from seeds  3) decrease time to
flowering (esp. grafting budding) by-passes
juvenile phase 
Disadvantages 1) can only propagate a few from
each parent (except tissue culture).  2)
requires a lot of labor 
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Cutting ( setek )

• Definition

a plant part that when removed from the parent
plant and placed under the proper environmental
conditions forms adventitious roots and/or
shoots. 

• Cutting capable of regenerating roots (or
  shoots) from adventitious
• meristem.
• Cuttings defined by size and location on parent
  plant
• stem tip shoot pucuk
• nodal
• root
• leaf
• Cuttings also defined by condition of growth
• softwood, semihardwood, hardwood

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Conditions required for rooting cuttings...

• Hardwood and root cuttings require well drained
  medium, but little moisture control.
• Leafy cuttings require high humidity to prevent
  excessive dehydration
• intermittent mist systems.
• poly tents or cold frames.
• fog.
• Medium into which cuttings are stuck must be
  disease free, well drained, and light.
• Auxin application now standard treatment.

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Shoot Cutting

• Roots form on shoots to produce a complete plant.