Download What are the parts of a flower?

QOD #16
1/26/2015
How many parts do you think a flower has?
ANNOUNCEMENTS
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14
Today…
Parts of the Flower Powerpoint
 Flower Dissection
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Sexual Reproductive Parts in Plants
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To understand how plants reproduce, we must first
understand their reproductive organs
Flowers are the reproductive organ of the plant
That’s right! They aren’t just pretty and smell good!
They are diverse in size, shape and color.
They are designed to attract certain animals or take
advantage of wind and rain
Parts of a Flower
Flower Dissection
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You will each be given a flower
As we discuss the parts, pull the part off of your
flower
You will need to draw a picture of the part on
the chart you have been given.
Next, you will need to write the function of that
part on the chart.
Questions??
Receptacle
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Swollen portion of the stem
Where flower parts are attached to
stem
What are the parts of a flower?
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Beneath the petals are more leaf-like structures,
called sepals, which are often green. The
sepals support the petals and protect the flower
before it opens.
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When all of the
sepals are fused
together, we call
them a calyx.
What are the parts of a flower?
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Flowers also often
have parts that are
neither male nor
female; these are the
petals, usually colorful
leaf-like structures that
often attract animals
and insects.
What are the parts of a flower?
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The male part of the flower
is called the stamen, which
is made of the stalk-like
filament that holds up the
sack-like anther.
The anther contains pollen,
the grain released by
flowers, which contains the
sperm.
What are the parts of a flower?
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The female part of the flower
is called the pistil.
It consists of a sticky tissue
at its end called the stigma,
which is receptive to pollen.
Below the stigma is a
rodshaped middle part called
the style and a swollen base
containing eggs called the
ovary.
Perfect vs. Imperfect Flowers
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Where the stamens and pistils
are found in the same flower it
is called perfect , as in most of
our garden plants.
But when only one sex of
these essential organs is found
in the same flower it is called
imperfect.
A COMPARISON OF MONOCOTS & DICOTS
Flower Dissection
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Sepals: leaf like structures that fold back as the flower
opens. Located beneath the petals. Collectively they are
called the calyx. Form the protective covering of the
flower before it opens. Some sepals have spines or
chemicals that protect the flower bud from insects and
other animals.
Petals: Usually brightly colored and serve to attract
pollinators
Stamen: the male reproductive part of the flower.
Consists of a filament which supports the anther. The
anther produces the pollen or male sex cells.
Pistils- female reproductive parts of the flower; consists
of a stigma which has a sticky surface for capturing
pollen; and a style which is tube-like and connects the
stigma to the ovary; and an ovary which contains the
eggs.
Complete vs Incomplete
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Complete: a flower that has all four major parts
(sepal, petals, stamens, pistils)
– Apple, Lily, Pea
Incomplete: a flower that lacks one or more of
the major parts
– squash plants, sweet corn, American holly,
and most grasses
Flower Inflorescence
The arrangement of flowers on a stem
TOMORROW…
Pass out agreement forms and record books
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Pollination and Fertilization Powerpoint
Eat Cheetos 
Homework is to bring in a seed from home
(preferably from something eaten)
Do yo’ job!
QOD #17
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1/27/2015
Name one part of the flower and its function.
ANNOUNCEMENTS
Don’t forget that if you
want to retake your test,
you need to do so this
morning
15
Today…
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Pass out agreement forms and record books
Pollination and Fertilization Powerpoint
Homework for tomorrow is to bring in a seed
from home (preferably from something eaten)
Pollination
Pollination is the process by which pollen is
placed on the stigma
-Self-pollination = Pollen from a flower’s
anther pollinates stigma of the same flower
-Cross-pollination = Pollen from anther of one
flower pollinates another flower’s stigma
-Hybrid = offspring resulting from cross
pollination
Pollination
Several plant structures promote cross pollination
Separation of male and female structures in space
-Dioecious- the plant produces only male or female
-Monoecious- produces male and female flowers on the
same plant
Separation of male and female structures in time
-Even if functional stamens and pistils are both found in
the same flower, they may reach maturity at different
times
Pollination
Successful pollination in many angiosperms
depends on regular attraction of pollinators
Flowers & animal pollinators have coevolved
resulting in specialized relationships
-Bees are the most common
insect pollinators
Bees are attracted to flowers that have markings
that reflect UV light. As bee feeds on nectar, it
picks up pollen.
Nectar: a sugary fluid secreted by plants, especially
within flowers to encourage pollination by insects
and other animals. It is collected by bees to make
into honey.
Pollination
Bees typically visit yellow or blue flowers
-Yellow flowers are marked in distinctive
ways that are normally invisible to us
-Bull’s eye or landing strip
The petals of some orchids are arranged to look
like a female bee. The petals even take the
shape of the antennae and wings of the insect.
The flower even smells like a female bee. The
male bees are fooled enough to try to mate
with the orchid flower. As they do so they
transfer pollen from one orchid to another.
Flowers that attract hummingbirds have nectar
located deep in floral tube where only the long, thin
beak and tongue of that bird can reach. Picks up
pollen on beak and feathers while feeding.
Rotting Flesh
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Many flowers look and smell
like rotting flesh, attracting a
variety of flies and beetles
looking for a meal or a place to
lay eggs. One such is devil's
claw, a plant in the milkweed
family. The flower's stench
attracts blowflies, which lay
their eggs on the blossoms and
pollinate them as they go from
flower to flower. But the
maggots that hatch on the
flowers die because, unlike real
carrion, the flowers offer no
food for them.
Fertilization
Fertilization occurs when one sperm cell
nucleus fuses with an egg cell nucleus
forming a zygote that will become a seed
https://www.youtube.com/watch?v=aXT1D
ZEHsMk
Tomorrow…
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I will not be here
You will complete your horticulture fandango for
this unit
Fruit and Seed Powerpoint
QOD #18
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1/28/2015
What is the difference between pollination
and fertilization?
ANNOUNCEMENTS
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16
Today…
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Fruit and Seed Powerpoint
Fruit
After pollination and fertilization, the flower
petals begin to drop and the ovary and
other surrounding parts enlarge and
develop into a fruit
2 Types:
Fleshy- soft with seeds enclosed
Blueberry, Peach, Tomato, Watermelon
Dry- hard and brittle
Pea, Sunflower, Acorn, Corn, Nuts
SEEDS
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1. Seed coat
2. Stored Food
3. Embryo
SEEDS
Seed Coat
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The tissue that surrounds the embryo
and endosperm
Protects the seed from moisture loss,
injury, or other unfavorable conditions
Stored Food
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Contains sugars, proteins, and fats or oils
Used by the plant in its first stage of
growth and development
Monocots- endosperm
Dicots- cotyledons
Seed Embryo
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The complete miniature plant in a resting
stage
Has a root, stem, and one or two
cotyledons (seed leaves)
Monocot and Dicot
Tomorrow…
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Germination Powerpoint- steps of germination
Plant Seeds in plastic bags
Workday in the greenhouse and garden
QOD #19
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1/29/2015
What are the 3 parts of a seed?
ANNOUNCEMENTS
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17
Today…
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Germination Powerpoint- steps of germination
Seeds in plastic bags
Workday in the greenhouse and garden
Germination
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A process of events whereby the seed
embryo goes from a dormant state to
an active growing state
Germination
Needed for Germination
 1. Temperature- winter vs summer
annuals
 2. Moisture- sufficient and continual
supply of water
 3. Air
 4. Light or absence of it
Germination
Process
 1. Imbibition: Seed absorbs water
 2. Radicle (root) emerges (becomes
the primary root)
 3. Plumule or embryonic shoot (stem)
emerges
 4. Leaves form and food production
begins
Tomorrow…
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I will not be here tomorrow 
Your assignment will be a webquest and will
cover the material from this unit and the last
unit
PLEASE make sure you do your jobs!
– Take up papers person will need to take up
QOD’s for the sub on Friday
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Please complete your jobs and sign off on the
job sheet
QOD #20
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1/30/2015
What is imbibition?
ANNOUNCEMENTS
QOD’s are due today
18
Today…
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Sub Work
Webquest
Monday…
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Review Day
Test on Tuesday
QOD #21
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2/2/2015
What is germination?
ANNOUNCEMENTS
Make sure you get a new
QOD Sheet!
19
Today…
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FFA Calendar
FFA JAckets
GA Health Survey
Put seeds in plastic bags to germinate
Review Day
Light up Ball Game
Tomorrow…
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Test Day!!!
Feel free to take home any materials that
you need to study
QOD #22
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2/3/2015
What do you need to do to make an A on
your test today?
ANNOUNCEMENTS
Make sure you get a new
QOD Sheet!
20
Today…
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15 minutes to study
Take up horticulture fandango
Take test
Grade and pass out tests
Tomorrow…
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We will begin discussing propagation