1. Plant reproduction
Plant Reproduction

2. Reproduction Do you remember the 7 characteristics of living things?
Movement
Respiration
Sensitivity
Growth
Reproduction
Excretion
Nutrition

3. Reproduction is the way new individuals are made.
1. Sexual reproduction
Plants can reproduce in two ways
2. Asexual reproduction

4. What is the difference? Sexual Reproduction two parents involved.
2 different sex cells join together to form a zygote.
the new plant is NOT identical to its parents.
Asexual Reproduction
just one parent.
It does not involve sex cells
the new plant IS identical to its parent.

5. The following slides show asexual reproduction…

6. Day 1

7. Day 6

8. Day 13

9. Day 20

10. Day 29

11. Day 42

12. Day 50

13. Day 50
Some of the new growths are beginning to turn green – these will become the shoots of the new plant
Some of the new growths are beginning to turn downwards – these will become the roots of the new plant

14. Describe what has happened to this potato over the 50 days

15. Other plants that reproduce asexually….

16. The “runner” grows from the base of the plant
Asexual Reproduction
The “runner” grows from the base of the plant
when it is at enough distance it will grow new roots and a new shoot to become a new plant.
The strawberry plant reproduces in this way.
runner

17. Spider plant 1. Parent plant 2. Cells divide to grow a new stem
1. Parent plant
2. Cells divide to grow a new stem
3. New plant grows at end of new stem

18. Strawberry 1. Parent plant 3. New plant grows at end of stem
1. Parent plant
3. New plant grows at end of stem
2. Cells divide to grow new stem

19. Sexual reproduction Petals- Carpel Stamen Sepals
Plants that reproduce sexually use flowers.
Each flower has both male and female organs.
Petals-
Stigma
Carpel
(female)
Style
Anther
Stamen
(male)
Ovary
Filament
Sepals

20. OB52 sepal …locate the sepal… answer OB52 OB53 OB54 OB55 OB56 OB57

21. OB52 sepal …locate the sepal… answer OB52 OB53 OB54 OB55 OB56 OB57

22. OB52 petal …locate the petal... answer OB52 OB53 OB54 OB55 OB56 OB57

23. OB52 petal …locate the petal… answer OB52 OB53 OB54 OB55 OB56 OB57

24. OB52 carpel …locate the carpel… answer OB52 OB53 OB54 OB55 OB56 OB57

25. OB52 carpel …locate the carpel… answer OB52 OB53 OB54 OB55 OB56 OB57

26. OB52 stamen …locate the stamen… answer OB52 OB53 OB54 OB55 OB56 OB57

27. OB52 stamen …locate the stamen… answer OB52 OB53 OB54 OB55 OB56 OB57

29. Functions of the stamen – Male reproductive part
made up of two parts…
anther: pollen(male sex cell) is produced here
filament: this stalk supports the anther

30. Making the sex cells…
Put a diagram to show the anther split open to show pollen grains

31. Functions of the Female parts
…carpel - female reproductive organ…
…made up of three parts…
stigma: pollen lands here
style: this stalk connects the stigma to the ovary…
ovary: the egg (female sex cell )is produced here…

32. Diagram to show carpel cut open to show egg

33. During pollination the pollen travels from the anther of one plant to the stigma of another plant

34. Pollen is carried by animals – insects , bats, birds, dogs etc…
Mostly by insects – refer to the relationship that is good for both organisms!

35. Pollen is also carried by the wind

36. Fertilisation is when the male gamete joins with the female gamete, to form the first cell of the new plant (the zygote)
Animation of pollen nucleus fusing with egg nucleus to form one new cell

37. Making a seed
After fertilisation the first cell divides many times to make the seed.
Photograph of bean seeds needed, and a little tin of beans on the big yellow bean?

38. Dispersal when the seed is brought away from the parent plant.
‘Bye
Seed dispersal
Dispersal when the seed is brought away from the parent plant.
Animation of a little pea leaving home?
Seeds are dispersed to ensure a better chance of survival - It avoids overcrowding ! 

39. Wind dispersal Some plants disperse their seeds using the wind.
An example is the sycamore tree:

40. Water dispersal Some plants disperse their seeds using the wind.
An example is the coconut plant

41. Animal dispersal Some plants disperse their seeds using animals
An example is the burdock plant

42. The pea fruit bursts open and throws out its own seeds
Self dispersal
Some plants disperse their seeds themselves
An example is the pea plant.
The pea fruit bursts open and throws out its own seeds

43. How is this seed dispersed?

44. How is this seed dispersed?

45. How is this seed dispersed?

46. How is this seed dispersed?

47. How is this seed dispersed?

48. How is this seed dispersed?

49. What a seed is made of
Food store

50. Seed Structure 1. testa 2. food supply 3. embryo = radicle and plumule
this broad bean seed has been soaked and taken apart
2 Photographs of bean seed to go here
1: outside with testa labelled
2: inside with food store and embryo labelled

51. …embryo = radicle and plumule…
…have a closer look at the embryo
…embryo = radicle and plumule…
the radicle will grow to be the root
The plumule will grow to be the shoot
2 Photographs of bean seed to go here
1: outside with testa labelled
2: inside with food store and embryo labelled

52. Germination Germination is the growth of the seed into a new plant
Some also need wither light or darkness

53. Germination
when the conditions are right, the embryo uses up the stored food and grows into the root and shoot of the new plant

54. …three conditions that must be right for a seed to germinate…
Oxygen
Water
Correct temperature

55. Showing that water, oxygen and the correct temperature are needed for germination

56. review the plant life cycle2
pollen is transferred 3
After fertilization flower withers 1
seeds develop in ovary 4
seeds disperse and germinate into new plant 4