Pollination

6th grade science

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: Pollination

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.

Click here to see where your favorit

e food comes from

PURPOSE OF THE FLOWER To attract pollinators with colorful petals, scent, nectar and

pollen

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

Pollen Yellow powder.

Fertilizes the eggs.

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

Insect-pollinated specieshave sticky of barbedpollen grains

Wind-pollinated speciesis lightweight, small andsmooth (corn pollen)

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

Bees

Butterflies & moths

Flies, beetles & insects

Birds

Bats

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.

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 wind

Hay fever is being allergic to the pollen in the air

Bees They live on and depend on the

nectar and pollen for food.

Bees are guided by sight andsmell

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.

Butterflies and moths

Butterflies have a good color vision but poor sense of smell

Butterflies can see bright colors like red, orange, and purple

Flowers are usually shaped as a long tube because of insect’sproboscis – to get nectar

Moth 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.

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 flowersthat are dull in color (dull white or green), but have very strong odor

BirdsBirds have a good sense

of color, they like yellow orred flowers.

Birds do not have a goodsense of smell, so bird-pollinatedflowers usually have little odor.

Flowers provide fluid nectar ingreater quantities than insects

Hummingbirds use their long beak.

Pollen is large and sticky

BatsBats and are mammals

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

Bats prefer a strong, musty odor.

Flowers re bowl shaped.

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?

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.  

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 Song

Colony Collapse Disorder

What would happen if the bees disappeared?Bees in Danger

Flower book

Front Cover

Inside Left

NameDate

PeriodStamen – male part

(anther & filament)

Anther – makes pollenPollen – yellow powder

fertilizes eggs

Pistil – female part(stigma, style, & ovary)

Stigma – sticky, catches pollen

Style – tube that pollen travels downOvary – contains eggs

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

23

45

6

Inside RightUnder 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