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Plant Reproduction

Plant Reproduction. Asexual Reproduction in Plants. Involves only one parent plant Does not involve gametes (sex cells) so no fertilisation takes place New plants are genetically identical to each other and the parent plant. Sexual Reproduction in plants:. Involves two parent plants

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Plant Reproduction

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  1. Plant Reproduction

  2. Asexual Reproduction in Plants • Involves only one parent plant • Does not involve gametes (sex cells) so no fertilisation takes place • New plants are genetically identical to each other and the parent plant

  3. Sexual Reproduction in plants: • Involves two parent plants • Each parent plant produces gametes which fuse during fertilisation • New plant is not genetically identical to parent plants

  4. Method of Asexual Reproduction Examples of Plants that reproduce asexually: • Strawberry • Daffodil • Tulip • The strawberry produces a new stem at the base of the parent plant that grows across the surface of the ground. • This new stem is called a runner. • At certain places where the runner touches the ground it produces new roots and a new shoot.

  5. Main Parts of a Flower carpel

  6. Carpel Ovary

  7. The carpelconsists of the: • Stigma: where pollen lands • Style: connects stigma to ovary • Ovary: contains ovules which produce the female gamete, the egg The stamen consists of the: • Anther: produces pollen which contains the male gamete • Filament: supports anther Ovary

  8. Stages of Sexual Reproduction in Plants • Pollination (2) Fertilisation (3) Seed (and fruit) formation (4) Seed (and fruit) dispersal (5) Germination

  9. (1) Pollination Pollination: is the transfer of pollen from the stamen to the carpel. Two methods: (1) Wind pollination: Anthers Hang outside plant and wind Blows pollen to carpel of another plant (2) Insect pollination: insects such as bees pick up pollen on anther of one plant and carry it to carpel of another plant

  10. (2) Fertilisation Fertilisation: is the fusion of a male gamete with a female gamete to make a zygote. (1) Pollen lands on carpel and a tube, called the pollen tube, grows down the style into the ovary. (2) The male gamete passes from the pollen tube into an ovule and fuses with an egg to form a zygote. (3) The zygote can develop into a new plant.

  11. (3) Seed and Fruit Formation • Once fertilisation has occurred, the fertilised ovule becomes a seed. • The sepals, stamens and petals fall off the flower. • The ovary swells up and becomes the fruit. The fruit protects the seeds.

  12. Seed Structure Testa: Protective coat surrounding seed Plumule: baby shoot Radicle: baby root Food supply: provides energy for seed to grow Food supply

  13. (4) Seed Dispersal • The seed must be dispersed away from the parent plant to prevent competition for light, water, minerals and space.

  14. (5) Germination Germination: is the growth of a seed into a new plant. Conditions necessary for germination: • Water • Oxygen • Correct Temperature

  15. Mandatory Experiment: To Investigate the Conditions Necessary For Germination

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