Plant Reproduction

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Plant Reproduction
University of Winnipeg http//www.io.uwinnipeg.ca
/simmons/flower.htm
Topic 2022

• Mr. Christensen

Pearson College http//www.pearson-college.uwc.ca
/pearson/biology/asex/asex.htm
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Asexual Reproduction

• Asexual reproduction is the formation of new
  individuals from the cell(s) of a single parent.
• It is common in plants, less so in animals.

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Plant Asexual Reproduction

• Above ground Stems arch over and take root at the
  tips, forming new plants (Forsythia, Raspberry
  and Strawberry)
• Horizontal above ground stems are called stolons

Pearson College http//www.pearson-college.uwc.ca/
pearson/biology/asex/asex.htm
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Plant Asexual Reproduction

• Underground stems that serve for food storage and
  reproduction. Rhizomes, bulbs, corms and tubers

Jeruasalem Artichoke, potato (tuber)
Quackgrass Rhizomes Irises and day lilies
Pearson College http//www.pearson-college.uwc.ca/
pearson/biology/asex/asex.htm
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Plant Asexual Reproduction
Amaryllis Bulb
Gladiolus Corm
Pearson College http//www.pearson-college.uwc.ca/
pearson/biology/asex/asex.htm
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Plant Asexual Reproduction

• LeavesMitosis along the meristems at the leaf
  margins produce tiny plantlets that fall off and
  can take up an independent existence.

Pearson College http//www.pearson-college.uwc.ca/
pearson/biology/asex/asex.htm
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Plant Asexual Reproduction

• RootsPlants can send up stems from their roots
  to reproduce. Dandelion, Poplar, Aspen

California Pictures www.californiapictures.com/gal
lery.html
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Plant Asexual Reproduction

• Plant PropagationDeliberate propagation by
  asexual means to keep particularly desirable
  traits. Grafting removal of a twig (scion) from
  a desired plant and inserting it into a notch of
  a cut stump (stock plant).

University of Arizona http//ag.arizona.edu/pubs/g
arden/mg/propagation/grafting.html
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Plant Asexual Reproduction

• CuttingsUsing stems, leaves or roots of plants
  for asexual reproduction.

Pearson College http//www.pearson-college.uwc.ca/
pearson/biology/asex/asex.htm
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Plant Sexual Reproduction

• Sexual ReproductionSperm carried in the pollen
  from the male part of a flower fuses with the egg
  in the female part of the flower.

http//www.howe.k12.ok.us/jimaskew/bflower.htm
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Plant Sexual Reproduction

• PollinationTransfer of pollen from the male to
  the female part of the plant.
• Self-PollinationPollen of a plant pollinates a
  flower of the same plant (only some plants can do
  this, apple trees for example cannot)

University of the Western Cape http//www.botany.u
wc.ac.za/ecotree/flowers/pollination4.htm
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University of Illinois Urbana Champaign
http//www.life.uiuc.edu/plantbio/260/breedingsyst
ems/breedingsystems.htm
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Plant Sexual Reproduction

• Cross PollinationPollen of a plant pollinates
  another plant.
• HybridThe offspring of genetically different
  plants.

University of the Western Cape http//www.botany.u
wc.ac.za/ecotree/flowers/pollination4.htm
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Pollination Vectors

• Wind (grasses)
• Water (aquatic plants)
• Insects (bees, beetles, butterflies and wasps)
• Mammals (bats/rodents)
• Birds

University of the Western Cape http//www.botany.u
wc.ac.za/ecotree/flowers/pollination4.htm
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Plant Sexual Reproduction

• Complete FlowerA flower having all floral
  structures, including the calyx (sepals, corolla
  (petals), stamen (anthers and filaments) and
  pistil (stigma, style and ovary). (Rose)

Texas Technological University http//www.pssc.ttu
.edu/pss1321/Web20topics/cpa2.htm
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Plant Sexual Reproduction

• Incomplete FlowerA flower which lacks one or
  more floral structures
• Perfect FlowerA flower which has male and female
  floral structures in the same flower. (Rose,
  Apple, Tomato and Wheat)

Texas Technological University http//www.pssc.ttu
.edu/pss1321/Web20topics/cpa2.htm
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Plant Sexual Reproduction

• Imperfect FlowerA flower which has male and
  female floral structures in separate flowers.
  (Spruce, Ash and Maples
• Monoecious PlantA plant species having separate
  male and female flowers on the same
  plant.(example corn, cucumber, Birch)
• Dioecious PlantA plant species having male and
  female flowers that are on separate plants.
  (example buffalograss, Hollies, Yews, Ash,
  Asparagus and Maple.)

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Plant Sexual Reproduction
Male and Female flowers on a Pumpkin plant
http//www.pumpkinnook.com/how to/pollen.htm
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Plant use of the Suns Energy

• 1 Photosynthesis
• 2 Heat the mass of the plant
• 6 Heat the air
• 10 Reflected
• 43 Converted to heat and radiated
• 48 Used to evaporate water

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Plant Growth Cycles
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Flower Structure
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Fruit Classifications
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