Sexual plant propagation - PowerPoint PPT Presentation

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Sexual plant propagation

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Seed coat- outside covering which protects embryonic plant ... add manure, grass clippings, or compost to improve soil structure (organic matter) ... – PowerPoint PPT presentation

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Title: Sexual plant propagation


1
Sexual plant propagation
2
Propagation of plants from seeds
  • Composition of seeds
  • Seed coat- outside covering which protects
    embryonic plant
  • endosperm- stored plants food, and nourishes
    embryonic plant during germination
  • Cotyledon gets initial nutrients from the
    endosperm

3
Propagation of plants from seeds
  • embryo - a new plant that is developed as a
    result of fertilization, and during germination
    it extends its roots and seed leaves (cotyledons)
    to form a new plant.

4
Propagation of plants from seeds
  • Germination media
  • favorable pH
  • supply of plant nutrients
  • firm and porous
  • sterile and free from foreign materials

5
Indirect seeding
  • Seeds sown in a separate place from where they
    will eventually grow to maturity
  • Transplanted one or more times before reaching
    permanent growing area

6
Flats
  • made of wood, plastic, and metal
  • have drainage holes in bottom
  • seeds generally sown in rows.

7
When to seed
  • important in business to have saleable product
    ready at market time

8
Sowing seeds
  • follow package directions to determine planting
    distance
  • cover with sprinkling of moist sphagnum or peat
    moss
  • labelname, variety, and date sown

9
Watering
  • water from bottom
  • if watering from top be careful to avoid washing
    seed out or too deeply into soil

10
Germination
  • 65-70 degrees soil temperature
  • retain humidity
  • cover with glass or plastic

11
Germination
  • some seeds require three days of darkness prior
    to germination
  • cover with newspaper instead of glass

12
Germination
  • water with a fine mist or from the bottom

13
Transplanting seedlings
  • following germination plants develop seed leaves
    - cotyledons
  • allow plant to grow until first true leaves are
    present before transplanting

14
Transplanting seedlings
  • hold seedlings by true leaves not by the stem
    with thumb and forefinger
  • bruised stem could cause plant death

15
Transplanting seedlings
  • dont shake off media from roots
  • can cause them to dry out too much

16
Transplanting seedlings
  • plant about 2 inches apart
  • insert at depth a little deeper than they were
    grown before
  • gently press media around roots
  • water with gentle stream to settle soil around
    roots

17
Direct seeding
  • planting seeds directly into the permanent
    growing area
  • most economical
  • media-soil
  • prepare by loosening soil and removing all large
    clumps

18
Direct seeding
  • add manure, grass clippings, or compost to
    improve soil structure (organic matter)
  • chemical treatment
  • disease prevention
  • insect prevention

19
Direct seeding
  • Germination Requirement
  • same as indirect seeding.

20
Treatments of seed for Germination
  • soak in water or acid bath to soften seed coat
  • scratch with sand paper
  • allows water into seed

21
Treatments of seed for Germination
  • Alternate wetting and drying
  • Presence of light
  • Darkness
  • Follow package instructions
  • Fire or extreme heat- Jack Pine
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