Transcript STC Plant Growth and Development Kennewick School District

STC Plant Growth and
Development
Lesson 11: Pollinating Flowers
Kennewick School District
STC Plant Growth and Development
Lesson 11: Pollinating Flowers
Materials list
For each student:
 Student notebook
 1 bee stick
 Plants with open flowers
For every two students:
 1 hand lens
STC Plant Growth and Development
Lesson 11: Pollinating Flowers
Pick up your plants, bee sticks,
and hand lens from the
distribution station.
STC Plant Growth and Development
Lesson 11: Pollinating Flowers
Use the bee to transfer pollen
from the blossom on one plant to
the blossom on another plant.
Pollinate every blossom that is
open by rotating the bee gently.
STC Plant Growth and Development
Lesson 11: Pollinating Flowers
Remember to cross-pollinate!
Brassica flowers must
be cross-pollinated.
That means the pollen
from one plant can not
pollinate any of the
flowers on that same
plant. Pollen must be
carried from the
flower of one plant to
the flower of another
plant.
STC Plant Growth and Development
Lesson 11: Pollinating Flowers
Use the hand lens to look for:

pollen on different parts of the plant

pollen trapped in the bee’s hairs
STC Plant Growth and Development
Lesson 11: Pollinating Flowers
Clean up and put all supplies
where they belong.
STC Plant Growth and Development
Figure 11-1
Bee pollinating a
Brassica flower
Lesson 11: Pollinating Flowers
STC Plant Growth and Development
Figure 11-1
Lesson 11: Pollinating Flowers
•In real life, what
attracts the bee to the
flower?
•How does the bee
reach the sweet nectar
in the bottom of the
flower?
•What else do you
notice about the bee?
What does the bee get from the flower?
STC Plant Growth and Development
Figure 11-1
Lesson 11: Pollinating Flowers
•Look for the female parts
of the flower—the pistil
with the sticky stigma.
•Look for the male parts
of the flower—the anthers
on stalks called filaments.
The anthers hold the
pollen.
•How do you think the
male part (pollen) of one
plant can get to the female
part (stigma) of another
plant?
What does the flower get from the bee?
STC Plant Growth and Development
Lesson 11: Pollinating Flowers
Reading Selection: The Bee and the
Brassica: Interdependence
the filament and anther,
produce the pollen,
which looks like fine
yellow powder. Pollen
must travel to the female
parts, the pistil and
stigma, of another flower
on a different Brassica
plant. Unless the pollen
from one plant can reach
another plant, no new
seeds will form. Then, no
new Brassica seedlings
STC Plant Growth and Development
Lesson 11: Pollinating Flowers
Reading Selection: The Bee and the
Brassica: Interdependence
flower, some of the
pollen on her body sticks
to the stigma there.
Now the bee has done her
job. The bee has
collected two kinds of
food from the flower. At
the same time, it has
carried pollen from one
flower to another. New
seeds will form. Soon
new flowers will bloom.
STC Plant Growth and Development
Lesson 11: Pollinating Flowers
Update your Table of Contents
STC Plant Growth and Development
Lesson 11: Pollinating Flowers
Add this vocabulary word and its meaning to your glossary.
cross-pollination
The process by which pollen is
carried from the male part of a flower
to the female part of another flower.