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Plant reproduction

Plant reproduction. I. Flowers A. Pollen grains and ovules B. Reproduction in general C. Flower parts D. Flower characteristics II. Fertilization A. Pollination B. Double fertilization III. Seeds and fruits A. Anatomy of a seed B. Seed dispersal C. Fruit formation D. Fruit types.

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Plant reproduction

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  1. Plant reproduction I. FlowersA. Pollen grains and ovules B. Reproduction in general C. Flower partsD. Flower characteristics II. Fertilization A. Pollination B. Double fertilization III. Seeds and fruitsA. Anatomy of a seed B. Seed dispersal C. Fruit formation D. Fruit types

  2. germ cell I. Flowers A. Pollen grains and ovules B. Reproduction in general tube cell haploid (1n) versus diploid (2n) central cell ovules polar nuclei ovary 7 cells, 8 nuclei egg

  3. C. Flower parts p163 /corolla (2n) (1n) (carpel) anther sepals/calyx peduncle

  4. D. Flower characteristics • perfect and imperfect; complete and incomplete • ovary position • symmetry superior ovary inferior ovary female male bilateral symmetry radial symmetry

  5. 4. Inflorescences pp169-171 spadix solitary

  6. Pollination • 1. Definition • 2. Barriers to self pollination • 3. Attraction and rewards II. Fertilization mimic high Barriers to self pollination time of maturation genetic differences nectar guides

  7. A. Pollination 4. types self buzz animal Cross pollination Self pollination wind

  8. B. Double fertilization p175 pollen pollen tube ovule endosperm embryo Monocots versus dicots

  9. III. Seeds and fruits A. Anatomy of a seed micropyle hilum Monocots versus dicots

  10. B. Seed dispersal

  11. C. Fruit formation exocarp pericarp mesocarp endocarp

  12. Examples D. Fruit types Fruit type Origin Other Single ovary Simple Many seeds Fleshy endo 1. berry Juice sacs Leathery pericarp a. hesperidium Many seeds Inseparable exo b. pepo One seed Stony endo 2. drupe Many seeds Papery endo 3. pome Many ovaries Same flower Many fused fruits Aggregate Many ovaries Many flowers Multiple

  13. Homework: compare apples and oranges The end

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