REPRODUCTIVE STRATEGIES

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REPRODUCTIVE STRATEGIES

• sexual reproduction
• asexual reproduction

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SEXUAL REPRODUCTION

• meiosis
• fertilization

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F1
meiosis alternative associations
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TYPES OF SEXUAL REPRODUCTION
dioecious
monoecious or perfect flowers
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Monoecious male and female flowers parts on
separate flowers on same plants
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TYPES OF SEXUAL REPRODUCTION
Example dioecious
Example monoecious
Salix, Populus, Fraxinus, Sassafras, Taxus,
Pinaceae, Cupressaceae, Betulaceae, Fagaceae,
Juglandaceae.
Example perfect flowers
Magnoliaceae, Rosaceae, Fabaceae, Cornaceae,
Ulmaceae, Hippocastanaceae..
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CONSEQUENCES OF SEXUAL REPRODUCTION
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ASEXUAL REPRODUCTION
No meiosis fertilization
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VEGETATIVE REPRODUCTION
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TYPES OF VEGETATIVE REPRODUCTION

• layering
• root-crown sprouts
• root suckers
• stump (stem) sprouts

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LAYERING
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ROOT CROWN SPROUTS
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ROOT SUCKERS Populus tremuloides
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ROOT SUCKERS Clones of Populus tremuloides
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STEM SPROUTS
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Epicormic branching
Old-growth Pseudotsuga menziesii
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EXAMPLE
THREE FORKS PARKSnoqualmie River
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Snoqualmie River
Snoqualmie River discharge
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Populus trichocarpa roots
Populus trichocarpa stems
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stem sprouts
Populus trichocarpa
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Populus trichocarpa from Yellow Hill trail
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CONSEQUENCES OF ASEXUAL REPRODUCTION
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ASEXUAL REPRODUCTIONAPPLICATION
Populus hybrids
CLONAL PRODUCTION FORESTRY
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Populus hybrids
CLONAL PRODUCTION FORESTRY
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GRAFTING ornamental and fruit trees, shrubs
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scion
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