Download - Agronomy #1
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.