Agronomy #1Oct. 10th 2012

Plant review:The symbol “” means that the function

of the part follows

Plant review:Male Parts

Stamen- male part of the flower-made up of the filament + anther

-# of stamen usually = # of petals.

IKEBENA- Japanese Flower

Plant review:Male Parts

Anther- on top of filament produces and contains pollen

Filament- fine hair-like stalksupports anther

IKEBENA- Japanese Flower

Plant review:Female Parts

Pistil- female part of the flower-made up of the stigma, style, and

ovary.

Stigma- sticky bulb in center of flowersreceives pollen grains for germination

cucumber flower

Plant review:Female Parts

Style- long stalk supports stigma

Ovary- usually at the bottom of the flowerhas the seeds inside and turns into the

fruit that we eat.

Ovule- part of the ovary that becomes the seeds.

cucumber flower

Plant review:Other Important Parts of a Flower

Petal- colorful, bright part of the flower attract pollinators

Plant review:Other Important Parts of a Flower

Sepal- looks like little green leavescovers the outside of flower bud to

protect the flower before it opens.

stigma

style

ovary

anther

filament

pollen

Be ready for quiz on Thur with more details:

Be ready for quiz on Thur:

pollen

ANSWER THESE: 1.stamen 2.pistil 3.anther 4.sepal 5.stigma

QUESTIONS-answer on back of notesheet.

1. What is the male part of the flower?

2. What is the female part of the flower?

3. What produces and contains pollen?

4. What is the part that looks like little green leaves ?

5. Where does pollen collect to begin germination?

Are plants made of 100% water?

…OBVIOUSLY NOT

Click icon to add picture

Compare the rainy season to the dry season growth.

In 1771 Joseph Priestly performed an experiment.

He burnt a candle in a sealed container with a plant.

The candle flame went out after a little while. Why?

He tried to light the candle, but it would not light.

After a month he was able to light the candle.

What does this show?Plants free up O2 (oxygen)

How did he light the candle?¤

PHOTOSYNTHESISUsing the energy of sunlight to convert

WATER and CARBON DIOXIDE into OXYGEN and high energy SUGARS.

What are 3 things plants need to grow?

1. Water,2. Sunlight

3. Carbon dioxide (CO2)

Where does the photosynthesis take place?

In chloroplasts

What do plants produce?Glucose sugar +

(starch = long chains of glucose molecules), Oxygen (O2)

Why is this upside down?-No… not because we are crazy!!

reaction for photosynthesis? need make

light energy chemical energy

water +carbon dioxide sugar + oxygen

How come a plant can survive in a closet?

Glucose may be stored as either glucose or starch.

It is harder to break down starch than simple sugars. Why?

Will it eventually die?

**CO2 mentionable…1 acre of corn removes 5512 pounds

(mass of 37 students) of CO2 in one growing season.

LIGHT & PIGMENTS:

In addition to water and CO2, photosynthesis requires light and chlorophyll, a molecule in chloroplasts.

CHLOROPHYLL = plants’ main pigment, appears green.

Lets try to figure out the chemical reaction called cellular respiration

Animal needs? Animals produce? EnzymesC6H12O6 + 6 O2 6 CO2 + 6 H20 + Energy

¤sugar + oxygen carbon dioxide +water+ energy

Plants go through respiration too!!

EnzymesC6H12O6 + 6 O2 6 CO2 + 6 H20 + Energy

¤sugar + oxygen carbon dioxide +water+ energy

Photosynthesis: chlorophyll

6CO2 + 6H2O + light C6H12O6 + 6O2

Respiration: enzymes

C6H12O6 + 6O2 6CO2 + 6H2O +

energy

They are the opposite

When do animals go through respiration?

24 hours a day, 365.25 days a year until they die.

When do plants go through respiration?24 hours a day, 365.25 days a year

until they die.

When do animals go through photosynthesis?

Never.

When do plants go through photosynthesis?

Only when there is light.

Transpiration When water in the

roots is pulled through the plant and exits as water vapor through the stomata of the leaves

Transpiration uses about 90% of the water that enters the plant.

Transpiration Transports nutrients. Helps plants cool off. Gives off Oxygen Absorbs Carbon

Dioxide

How does it work?1. entrance

Xylem – Pulls water and minerals from the roots through stem and up to the leaves

Phloem – Pulls glucose from photosynthesis to go throughout the plant and down to the roots

How does it work?2. exit

Opening in the bottom of the leaves› Guard Cells and

Stoma Leaf Structure

How does it cool?

80% of the cooling effect of a shade tree is from the evaporative cooling effects of transpiration.