Topic 9: Plant Science 9.3 Reproduction in Plants

1 - Flowering1 - Flowering Read & Consider Understandings – What is the function of a flower?

Flowers  Receptacle  Sepal  Petal  Stamen  Anther  Filament  Carpel / Pistil  Ovary  Stigma  Style  Receptacle  Sepal  Petal  Stamen  Anther  Filament  Carpel / Pistil  Ovary  Stigma  Style

Flowering  Flowers produced by shoot meristems  Involves changes in the expression of shoot cell genes  New proteins are produced and the cells and tissues make up the flower  Timing is influenced by light

Photoperiodism Short Day Vs. Long Day

Seeds

1 - Reproduction1 - Reproduction Read & Consider Understandings – What other organisms contribute to plant reproduction?

Pollination Pollination – the transfer of pollen from a mature anther to a receptive stigma. Agents: insects, wind, water, birds, or bats  Self pollination  Cross pollination Pollination – the transfer of pollen from a mature anther to a receptive stigma. Agents: insects, wind, water, birds, or bats  Self pollination  Cross pollination

Fertilization -Fertilization - 1. The pollen grain produces a tube that grows down the style and into the ovule 2. Two male nuclei are delivered 3. One fuses with the egg nucleus 4. The other fuses with a neighboring nucleus which triggers the formation of food storage 1. The pollen grain produces a tube that grows down the style and into the ovule 2. Two male nuclei are delivered 3. One fuses with the egg nucleus 4. The other fuses with a neighboring nucleus which triggers the formation of food storage

Seed Dispersal -Seed Dispersal -

Works CitedWorks Cited  McPherson, Graham. "Graham McPherson Photography." Somerset Lavender at Faulkland. N.p., n.d. Web. 15 May  "Pollinator Syndromes." Pollinator Syndromes. USGS, n.d. Web. 15 May  O'Neil, Dennis. "Basic Principles of Genetics: Mendel's Genetics." Basic Principles of Genetics: Mendel's Genetics. N.p., n.d. Web. 15 May 2015.