22638897
Description
Mind Map by William Sowden, updated more than 1 year ago
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Sexual Reproduction in Plants
- Parts and Stucture of the Flower
- Carpel - female
- Stigma
- Where the pollen
grain lands in
pollenation
- Where the pollen
grain lands in
pollenation
- Style
- Holds the stigma high
and firm
- Holds the stigma high
and firm
- Ovary
- Holds ovules, becomes
fruit after fertilisation
- Ovule contains
female gamete
- Ovule contains
female gamete
- Holds ovules, becomes
fruit after fertilisation
- Stigma
- Stamen - male
- Anther
- Made up of pollen sacs,
where pollen is made
- Pollen contains
the male gamete
- Pollen contains
the male gamete
- Made up of pollen sacs,
where pollen is made
- Filament
- Holds up the anther
- Holds up the anther
- Anther
- Other
- Petal
- Attracts insects for
pollination (in insect
pollinated plants)
- Attracts insects for
pollination (in insect
pollinated plants)
- Sepal
- Protects the plant
whilst it is in a bud
- Protects the plant
whilst it is in a bud
- Nectary
- Produces sugary nectar that attracts insects
for pollination (in insect pollinated plants)
- Produces sugary nectar that attracts insects
for pollination (in insect pollinated plants)
- Petal
- Carpel - female
- Pollination
- Self pollination
- When pollen of the same plant
begins fertilisation with the stigma
of the same plant, this is avoided by
different maturing times, or by
position of the anther to the stigma
- When pollen of the same plant
begins fertilisation with the stigma
of the same plant, this is avoided by
different maturing times, or by
position of the anther to the stigma
- Cross pollination
- When pollen from one plant reaches
the stigma of another plant, this is
prefered as it increases variation
- When pollen from one plant reaches
the stigma of another plant, this is
prefered as it increases variation
- Insect Pollination
- Insect used to spread
pollen for anther of one
plant to stigma of another
- Large, bright
flowers
- Scented
- Nectar
- Large, rough, but just a
little amount of pollen
- Anther and stigma inside flower
so that insect touches them
- Large, bright
flowers
- Insect used to spread
pollen for anther of one
plant to stigma of another
- Wind Polination
- Wind used to disperse
pollen from one anther to
another stigma
- No nectar or scent
- Small, green petals
- Lots of light pollen
- Feathery anthers and
stigmas out of the flower to
catch and release pollen
- No nectar or scent
- Wind used to disperse
pollen from one anther to
another stigma
- Self pollination
- Fertilisation
- A pollen tube grows from the pollen
landing onto the stigma and grows
down the style, into the ovary
- There are 8 haploid nuclei in the ovary including
the egg cell and 2 nuclei in the central cell
- One male nucleus fuses with the
two nuclei from the central cell to
form a triploid endosperm cell
- The endosperm develops into a
food store for the seedling
- The endosperm develops into a
food store for the seedling
- One male nucleus fuses with the
egg cell to form a diploid zygote
- The ovule develops into a seed
- The zygote becomes the plant embryo
- The zygote becomes the plant embryo
- The ovule develops into a seed
- One male nucleus fuses with the
two nuclei from the central cell to
form a triploid endosperm cell
- There are 8 haploid nuclei in the ovary including
the egg cell and 2 nuclei in the central cell
- A pollen tube grows from the pollen
landing onto the stigma and grows
down the style, into the ovary
- Seeds
- Dispersal
- Animal
- Seeds dispersed in fruit
eaten by animal, then
planted elsewhere
- Seeds dispersed in fruit
eaten by animal, then
planted elsewhere
- Wind
- Seeds have wings
and glide elsewhere
in the wind
- Seeds have wings
and glide elsewhere
in the wind
- Mechanical
- Seeds in pods that
burst open, sending
the seed elsewhere
- Seeds in pods that
burst open, sending
the seed elsewhere
- Water
- Buoyant seeds
travel on water
- Buoyant seeds
travel on water
- Animal
- Germination
- When the conditons
are correct, the seedling
will begin to grow
- Oxygen
- Warmth
- Water
- Oxygen
- When the conditons
are correct, the seedling
will begin to grow
- Dispersal
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