Photosynthesis The Key to Life on Earth. Topic #2015 Photosynthesis Power Point Presentation Aaron...
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Transcript of Photosynthesis The Key to Life on Earth. Topic #2015 Photosynthesis Power Point Presentation Aaron...
Photosynthesis
The Key to Life on Earth.
Topic #2015Photosynthesis Power Point Presentation
Aaron Gearhart
Why Learn About Photosynthesis?
• Photosynthesis is the most important chemical reaction on earth.
• Increase your understanding of plant needs.
What is it?
• Process plants use to convert carbon dioxide and water into sugar and oxygen
Picture taken from Life: The Science of Biology, 4th edition, by Sinauer Associates and WH Freeman
Plants as Autotrophs
• Autotrophs: Make their own energy
• Heterotrophs: Get energy from other living organisms
Light• How do plants make their energy?
• Is all light the same?
• The more the better?
• What properties does light have?
Wavelength
is the
symbol for wavelength
• Energy of light is inversely related to the wave length
Picture taken from Life: The Science of Biology, 4th edition, by Sinauer Associates and WH Freeman
Light quality• Spectrums
• Visible light
• Plants mainly use Red and Blue
• Why are plants green?
Picture taken from Life: The Science of Biology, 4th edition, by Sinauer Associates and WH Freeman
Light Quantity
• Measured in micromoles/m²
• Light quantity is the amount of light that hits a surface
• What variables can you think of that would affect light quantity?
Duration• Generally referred to as daylength in
the field.• Affects flowering, bulbset, tuberset,
germination, budset… etc.
• What are some benefits of greenhouse lighting? (think back to what we discussed in the last slide)
So Where Does the Light Go to Do It’s Thing?
Plant Cell Structure• The following are
important to know• Xylem• Phloem• Guard cell• Stoma• Chloroplasts
Picture taken from Life: The Science of Biology, 4th edition, by Sinauer Associates and WH Freeman
Plant Organelle Function
• Xylem• Phloem• Guard Cell• Stomata
Stomata
Picture taken from Life: The Science of Biology, 4th edition, by Sinauer Associates and WH Freeman
The All Important Chloroplast
• What is the chloroplast?
• What is chlorophyll?
• Thylakoids?
Picture taken from Life: The Science of Biology, 4th edition, by Sinauer Associates and WH Freeman
Formula for photosynthesis
6H2O + 6CO2 ----------> C6H12O6+ 6O2
Where does light fit in?
In English terms.
Factors affecting photosynthesis
• CO2 concentration• Temperature• Available water• Light