PhotosynthesisPhotosynthesis
By: Kenzy 8C By: Kenzy 8C
What is photosynthesis?
• Process plants use to make their own food
• Plants’ leaves contain chlorophyll• Chlorophyll (green color) makes
photosynthesis possible
The chlorophyll absorbs the sunlight.
Chloroplasts: Sites of Photosynthesis
• Photosynthesis– Occurs in chloroplasts, organelles in
certain plants– All green plant parts have chloroplasts
and carry out photosynthesis• The leaves have the most chloroplasts• The green color comes from chlorophyll in the
chloroplasts• The pigments absorb light energy
• In most plants, photosynthesis occurs primarily in the leaves, in the chloroplasts
• A chloroplast contains: – stroma, a fluid – grana, stacks of thylakoids
• The thylakoids contain chlorophyll– Chlorophyll is the green pigment that
captures light for photosynthesis
Photosynthesis occurs in chloroplasts
• The location and structure of chloroplasts
LEAF CROSS SECTION MESOPHYLL CELL
LEAF
Chloroplast
Mesophyll
CHLOROPLAST Intermembrane space
Outermembrane
Innermembrane
ThylakoidcompartmentThylakoidStroma
Granum
StromaGrana
The sunlight is combined with water, Carbon Dioxide and nutrients from the soil.
CO2
The chlorophyll processes the ingredients and makes sugarsugar (plant food) and oxygen.
SugarSugar + Air
O2
Plants and animals need each other to survive.
Animals including humans make the CO2 (carbon dioxide) plants need.They (the plants) make the O2 (oxygen) and food we need.
WHWHY ARY ARE PE PLANLANTS GTS GREREEN?EN?
It's not that easy bein' green Having to spend each day the color of the leaves When I think it could be nicer being red or yellow or gold Or something much more colorful like that…
Different wavelengths of visible light are seen by the human eye as different colors.
WHYWHY ARE ARE PLA PLANTS NTS GREGREEN?EN?
Gammarays
X-rays UV Infrared
Micro-waves
Radiowaves
Visible light
Wavelength (nm)
Why are plants green?
Reflected
light
Transmitted light
It's not that It's not that easy being easy being green… but green… but it is it is essential for essential for life on life on earth!earth!
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