Pollination Process Pollination Pollination is very important. It leads to the creation of new seeds that grow into new plants But how does pollination.

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Presentation transcript:

Pollination Process

Pollination Pollination is very important. It leads to the creation of new seeds that grow into new plants But how does pollination work? Well, it all begins in the flower. Flowering plants have several different parts that are important in pollination.

Pollination Flowers have male parts called stamens that produce a sticky powder called pollen. Flowers also have a female part called the pistil. The top of the pistil is called the stigma, and is often sticky. Seeds are made at the base of the pistil, in the ovule.

Pollination To be pollinated, pollen must be moved from a stamen to the stigma. When pollen from a plant's stamen is transferred to that same plant's stigma, it is called self-pollination.

Pollination When pollen from a plant's stamen is transferred to a different plant's stigma, it is called cross-pollination. Cross-pollination produces stronger plants.

Pollination The plants must be of the same species. For example, only pollen from a daisy can pollinate another daisy. Pollen from a rose or an apple tree would not work.

Pollination But how does pollen from one plant get moved to another?

Pollination

Pollination occurs in several ways. People can transfer pollen from one flower to another, but most plants are pollinated without any help from people. Usually plants rely on animals or the wind to pollinate them.

Pollination When animals such as bees, butterflies, moths, flies, and hummingbirds pollinate plants, it's accidental. They are not trying to pollinate the plant. Usually they are at the plant to get food, the sticky pollen or a sweet nectar made at the base of the petals.

Pollination When feeding, the animals accidentally rub against the stamens and get pollen stuck all over themselves. When they move to another flower to feed, some of the pollen can rub off onto this new plant's stigma.

Pollination Plants that are pollinated by animals often are brightly colored and have a strong smell to attract the animal pollinators. Another way plants are pollinated is by the wind. The wind picks up pollen from one plant and blows it onto another.

Pollination Plants that are pollinated by wind often have long stamens and pistils. Since they do not need to attract animal pollinators, they can be dully colored, unscented, and with small or no petals since no insect needs to land on them.

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Test What are the parts of a flower and how do they help in pollination? How is a seed protected? What happens when pollination takes place? What happens when fertilization takes place? Name the four parts of a flower. Do female cankerworms have wings?

Test Are cankerworms inch worms? Why do you think seeds might not germinate right away? The shape of the ______ helps it to travel. Do Fruits protect their plant seeds? What are the three main parts of plant fertilization?