Plant Reproduction

1. Plant Reproduction By Mr. A. Rogan

2. Plant Reproduction Asexual Reproduction: No Gametes Only one parent needed New organism genetically identical to parent Plants and bacteria reproduce this way

3. Plant Reproduction Sexual Reproduction: Male and Female Gametes involved Two parents are needed New organism will not be genetically identical to either parent

4. Plant Reproduction The Flower: The flower is the part of a plant that is involved in sexual reproduction

5. Plant Reproduction The Parts Of The Flower: Sepals Petals Carpel Stamen

6. Plant Reproduction Sepal: Green leaves which protect the flower when it is a bud Petals: Attract insects to the flower

7. Plant Reproduction The Stamen: Male Part of the flower Filament – stalk part of stamen Anther – Small bag on top of the filament contains pollen

8. Plant Reproduction Structure of the Carpel: Stigma – Pollen grains land here Style – Connects stigma to the ovary Ovary – Contains ovules Ovules – Contain female gametes - eggs

9. Plant Reproduction Stages in Sexual Reproduction in Plants: Pollination Fertilisation and Seed Formation Seed Dispersal Germination

10. Plant Reproduction Pollination: Happens when pollen from one flower is transferred to another flower of the same species Insect Pollination or Wind Pollination

11. Plant Reproduction Insect Pollination: Petals are bright and perfumed. Insect rub against Anther and pollen gets stuck to them Insect move to another plant of same species and pollen sticks to sticky stigma

12. Plant Reproduction Wind Pollination: The flowers have long anthers which hang outside the flower. Pollen is blown out of the anthers by the wind The stigma of a wind-pollinated flower is very large and feathery – able to catch pollen

13. Plant Reproduction Fertilisation and Seed Formation: After pollination, pollen tube develops out of the pollen grain and into the style, It then enters the ovule and male gamete travels down to join with the egg – zygote The zygote then becomes the seed. The ovary will turn into the fruit

14. Plant Reproduction Dispersal Of The Seed: The major function of the fruit is to scatter the seed of the plant Animal Dispersal Wind Dispersal Water Dispersal Self Dispersal

15. Plant Reproduction Animal Dispersal: Edible Fruits: Animal eats fruit and eventually passes the seed in its droppings, if seed falls in right place it will grow into new plant

16. Plant Reproduction Animal Dispersal: Contd Hooked Fruits: Fruits have tiny hooks on their surface, sticks to the animals, eventually fruit will be knocked off the animal.

17. Plant Reproduction Wind Dispersal: The wind provides a very effective method of carrying fruit away from the parent plant Dandelion uses parachute Sycamore tree uses winged fruits

18. Plant Reproduction Water Dispersal: The water lily is an example of a plant with fruits that can float. Water currents carry the fruit away, with the seeds inside

19. Plant Reproduction Self Dispersal: The gorse plant can scatter its own seed. In summer the plant dries out and suddenly bursts. The seeds shoot out from the fruit, and may land some distance from the parent plant

20. Plant Reproduction Germination: Plumule – Will form shoot of plant Radicle – Will become the root of the plant Testa – Protects the seed Food Store – Provides nourishment for the young plant

21. Plant Reproduction Conditions Necessary For Germination: Water Oxygen Warmth