Pollination - PowerPoint Presentation

Slide1

Pollination

6

th

grade scienceSlide2

What is Pollination

Pollination: the transfer of pollen from the anther of one flower to the stigma of another flower.

Fertilization

: occurs when the sperm in the pollen unites with an egg.

Brainpop: PollinationSlide3

Why is Pollination important?

Pollination is how plants reproduce and continue to exist.At least 80% of our world's crop plant species require pollination.

It is estimated that 1 out of every 3rd bite of food comes to us through the work of animal pollinators. Slide4

Purpose of the flower

To attract pollinators with colorful petals, scent, nectar and pollen

Remember

– plants are rooted in place. They cannot move. Slide5

Pollen

Yellow powder.Fertilizes the eggs.

The shape and form of pollen is related to its method of pollination…

Insect-pollinated species

have sticky of barbedpollen grainsWind-pollinated species

is lightweight, small andsmooth (corn pollen)Slide6

Pollinators

Since flowers can't move, they need to be able to attract pollinators or be built so that wind is able to pollinate them.

Pollinators

Wind

BeesButterflies & moths

Flies, beetles & insectsBirdsBats

Flowers attract pollinators with sweet nectar, bright colors, and shapes and structures.

Some flowers open at special times to attract pollinators such as night blooming plants that are pollinated by bats. Slide7

Wind

Most conifers and about 12% of the world’s flowering plants are wind-pollinated including grasses , the cereal crops; many trees; and ragweed.Small flowers with no bright colors, special odors, or nectar; Most have no petals

Release great amounts of pollen so that some pollen reaches stigma of other plants.

Large amount of pollen that is smooth, light, easily airborne;

Stigma feathery to catch pollen from windHay fever is being allergic to the pollen in the air Slide8

Bees

They live on and depend on the nectar and pollen for food.

Bees are guided by sight and

smell

Bees can see honey guides on flowers which are not visible to humans.See yellow

and blue colors,also ultraviolet light (not red –

it appears dull to them)

Prefer cup shaped flowers

that have landing pads.

Pollinate during the day.Slide9

Butterflies and moths

Butterflies have a good color vision but poor sense of smellButterflies can see bright colors like

red

,

orange, and purple

Flowers are usually shaped as a long tube because of insect’sproboscis – to get nectarMoth have a good sense of smell & pollinate at night. Flowers are usually white or pale and dull (red, purple, or pink) with sweet, strong odor.Slide10

Flies , beetles & insects

Flies have a good sense of smell and good vision. Flies like rotten smells and pale to dark colors (dull brown or purple)

Beetles have good vision and a good sense of smell.

Beetles pollinate flowers

that are dull in color (dull white or green), but have very strong odorSlide11

Birds

Birds have a good senseof color, they like yellow or

red

flowers.Birds do not have a goodsense of smell, so bird-pollinated

flowers usually have little odor.Flowers provide fluid nectar ingreater quantities than insects

Hummingbirds use their long beak.

Pollen is large and stickySlide12

Bats

Bats and are mammalsBats pollinate at night,

so flowers are open at night, white, and larger in size.

Bats prefer a strong, musty odor.

Flowers re bowl shaped.Slide13

Bees & Pollination

Bees are the most important pollinator.Bees are responsible for 80% of all the pollination in the world.

Bee video

Examine your bee –

Why do you think the legs are so hairy?How long are the legs?What do you notice about the eyes?Can you find the combs on the front legs?Slide14

Bee Facts

Honey bees have FIVE eyes! 3 small on top and 1 on each side of its head. Each eye has thousands of lenses. Bees can see ultraviolet light, which people can't. Because of this they can navigate

, even on a cloudy day. Honey bees use the sun as a reference point and the time it takes them to reach the hive to figure out exactly how to tell other bees where to fly to new flowers.  

Flowers make food for bees. Tiny bits of pollen get on their legs.  They drink nectar from the flowers they visit. They make honey from the nectar.  They use both honey and pollen as food. When they gather food, bees spread pollen from one flower to another.  Bees help flowers make seed by putting pollen from one flower on the next.

 Slide15

How Pollination Happens

The bee

goes to a

flower

in search of nectar to eat. While the bee is there, the bee rubs against the anther

and some pollen gets on his bee fur.

The bees goes to another

flower

for some more

nectar

.

While on that flower, some of the

pollen

sticks to the sticky

stigma

.

The

pollen

travels down the

style

into the

ovary

.

The pollen fertilizes the

eggs

in the ovary to form

seeds

.

Pollination SongSlide16

Colony Collapse Disorder

What would happen if the bees disappeared?

Bees in DangerSlide17

Flower book

Front CoverSlide18

Inside Left

Name

Date

Period

Stamen – male part

(anther & filament)

Anther – makes pollen

Pollen – yellow powder

fertilizes eggs

Pistil – female part

(stigma, style, & ovary)

Stigma – sticky, catches pollen

Style – tube that pollen travels down

Ovary – contains eggsSlide19

Inside Right

Fertilization

The

bee

goes to a

flower

in search of

nectar

to eat.

While the bee is there, the bee rubs against the

anther

and some

pollen

gets on his bee

fur

.

The bee goes to another

flower

for some more

nectar

.

While on that flower, some of the

pollen

sticks to the sticky

stigma

.

The

pollen

travels down the

style

into the

ovary.

The pollen fertilizes the

eggs

in the ovary to form

seeds

.

Photosynthesis

Pollination

1

2

3

4

5

6Slide20

Inside Right

Under leaves

Pollination:

the transfer of pollen from the anther of one flower to the stigma of another flower.

Fertilization

: occurs when the sperm in the pollen unites with an egg.

Photosynthesis

: plants make their own food;

Need: water, light, carbon dioxide.

Make glucose (sugar) & oxygen